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Transcript of Heat Flux Method
Experimental And Numerical Study OfLaminar Burning Velocity Of Methane-Air
Mixture Using Heat Flux Method
Pawan Kumar (SC11B038)
Under the guidance of:Dr. Prathap C.
Asst. Professor, IIST
Indian Institute of Space Science and Technology
Thiruvananthapuram
29 April, 2015
Flat FlameUsing Heat
Flux Method
Introduction
Aim
LaminarBurningVelocity
Heat FluxMethod
ExperimentalResult
NumericalMethod
Results AndDiscussions
ComputationalResult
Conclusions
Scope ofFuture Work
Outline
1 IntroductionAim
2 Laminar Burning Velocity
3 Heat Flux MethodExperimental Result
4 Numerical Method
5 Results And DiscussionsComputational Result
6 Conclusions
7 Scope of Future Work
Flat Flame Using Heat Flux Method 29 April, 2015 2/33
Flat FlameUsing Heat
Flux Method
Introduction
Aim
LaminarBurningVelocity
Heat FluxMethod
ExperimentalResult
NumericalMethod
Results AndDiscussions
ComputationalResult
Conclusions
Scope ofFuture Work
Aim
1 To design a new flat flame burner according to VanMaaren (1993) and fabricated it. The burner is validatedaccording to CH4-Air mixture. 1, 2
2 Using Heat Flux MethodExperimentally anchor an adiabatic laminar Flat Flame.Measurement of Laminar Burning Velocity of 1-D adiabaticflame using Flat Flame Burner.
3 2-D and 3-D simulation using ANSYS-FLUENT
4 Comparison of 2-D and 3-D simulation results.
1L. De Goey, A. Van Maaren, and R. Quax, Stabilization of adiabatic premixed laminar flames on a flatflame burner,
2K. J. Bosschaart and d. L. Goey, Extension of the heat flux method to subatmospheric pressures,
Flat Flame Using Heat Flux Method 29 April, 2015 3/33
Flat FlameUsing Heat
Flux Method
Introduction
Aim
LaminarBurningVelocity
Heat FluxMethod
ExperimentalResult
NumericalMethod
Results AndDiscussions
ComputationalResult
Conclusions
Scope ofFuture Work
Aim
1 To design a new flat flame burner according to VanMaaren (1993) and fabricated it. The burner is validatedaccording to CH4-Air mixture. 1, 2
2 Using Heat Flux MethodExperimentally anchor an adiabatic laminar Flat Flame.Measurement of Laminar Burning Velocity of 1-D adiabaticflame using Flat Flame Burner.
3 2-D and 3-D simulation using ANSYS-FLUENT
4 Comparison of 2-D and 3-D simulation results.
1L. De Goey, A. Van Maaren, and R. Quax, Stabilization of adiabatic premixed laminar flames on a flatflame burner,
2K. J. Bosschaart and d. L. Goey, Extension of the heat flux method to subatmospheric pressures,
Flat Flame Using Heat Flux Method 29 April, 2015 3/33
Flat FlameUsing Heat
Flux Method
Introduction
Aim
LaminarBurningVelocity
Heat FluxMethod
ExperimentalResult
NumericalMethod
Results AndDiscussions
ComputationalResult
Conclusions
Scope ofFuture Work
Aim
1 To design a new flat flame burner according to VanMaaren (1993) and fabricated it. The burner is validatedaccording to CH4-Air mixture. 1, 2
2 Using Heat Flux MethodExperimentally anchor an adiabatic laminar Flat Flame.Measurement of Laminar Burning Velocity of 1-D adiabaticflame using Flat Flame Burner.
3 2-D and 3-D simulation using ANSYS-FLUENT
4 Comparison of 2-D and 3-D simulation results.
1L. De Goey, A. Van Maaren, and R. Quax, Stabilization of adiabatic premixed laminar flames on a flatflame burner,
2K. J. Bosschaart and d. L. Goey, Extension of the heat flux method to subatmospheric pressures,
Flat Flame Using Heat Flux Method 29 April, 2015 3/33
Flat FlameUsing Heat
Flux Method
Introduction
Aim
LaminarBurningVelocity
Heat FluxMethod
ExperimentalResult
NumericalMethod
Results AndDiscussions
ComputationalResult
Conclusions
Scope ofFuture Work
Introduction
Combustion is a rapid oxidation
process of fuel which generates
essentially heat and sometimes light.
• A flame front is a visible part of exothermic reaction.
• Flame is self sustaining zone of localized combustion.
Flat Flame Using Heat Flux Method 29 April, 2015 4/33
Flat FlameUsing Heat
Flux Method
Introduction
Aim
LaminarBurningVelocity
Heat FluxMethod
ExperimentalResult
NumericalMethod
Results AndDiscussions
ComputationalResult
Conclusions
Scope ofFuture Work
On the basis of phases the fuel can be divided in three type :
Fuel
Gas SolidLiquid
Methane(CH4)
Flat Flame Using Heat Flux Method 29 April, 2015 5/33
Flat FlameUsing Heat
Flux Method
Introduction
Aim
LaminarBurningVelocity
Heat FluxMethod
ExperimentalResult
NumericalMethod
Results AndDiscussions
ComputationalResult
Conclusions
Scope ofFuture Work
Types of Flame: On the basis of state of mixedness
• Premixed Flame
• Non-Premixed Flame
The laminar premixed flames can be characterised by thefollowing ways:
• Laminar Burning Velocity
• Quenching Distance: Minimum distance for flame to quench.
• Flammability Limit: The lowest mole fraction of fuel andoxidiser require to anchor a flame.
• Minimum Ignition Energy : Minimum amount of energyrequired to ignite a sustainable flame
Flat Flame Using Heat Flux Method 29 April, 2015 6/33
Flat FlameUsing Heat
Flux Method
Introduction
Aim
LaminarBurningVelocity
Heat FluxMethod
ExperimentalResult
NumericalMethod
Results AndDiscussions
ComputationalResult
Conclusions
Scope ofFuture Work
Types of Flame: On the basis of state of mixedness
• Premixed Flame
• Non-Premixed Flame
The laminar premixed flames can be characterised by thefollowing ways:
• Laminar Burning Velocity
• Quenching Distance: Minimum distance for flame to quench.
• Flammability Limit: The lowest mole fraction of fuel andoxidiser require to anchor a flame.
• Minimum Ignition Energy : Minimum amount of energyrequired to ignite a sustainable flame
Flat Flame Using Heat Flux Method 29 April, 2015 6/33
Flat FlameUsing Heat
Flux Method
Introduction
Aim
LaminarBurningVelocity
Heat FluxMethod
ExperimentalResult
NumericalMethod
Results AndDiscussions
ComputationalResult
Conclusions
Scope ofFuture Work
Experimental Methods For Laminar BurningVelocity
Stationary Flames
• Conical Flame Method(Orifice/Nozzle/Slot)
• Counter Flow Method
• Flat Flame Method (Heat FluxMethod)
Propagating Flames
• Cylindrical Tube Method
• Spherical Bomb Method
Flat Flame Using Heat Flux Method 29 April, 2015 7/33
Flat FlameUsing Heat
Flux Method
Introduction
Aim
LaminarBurningVelocity
Heat FluxMethod
ExperimentalResult
NumericalMethod
Results AndDiscussions
ComputationalResult
Conclusions
Scope ofFuture Work
Experimental Methods For Laminar BurningVelocity
Stationary Flames
• Conical Flame Method(Orifice/Nozzle/Slot)
• Counter Flow Method
• Flat Flame Method (Heat FluxMethod)
Propagating Flames
• Cylindrical Tube Method
• Spherical Bomb Method
Flat Flame Using Heat Flux Method 29 April, 2015 7/33
Flat FlameUsing Heat
Flux Method
Introduction
Aim
LaminarBurningVelocity
Heat FluxMethod
ExperimentalResult
NumericalMethod
Results AndDiscussions
ComputationalResult
Conclusions
Scope ofFuture Work
Experimental Methods For Laminar BurningVelocity
Stationary Flames
• Conical Flame Method(Orifice/Nozzle/Slot)
• Counter Flow Method
• Flat Flame Method (Heat FluxMethod)
Propagating Flames
• Cylindrical Tube Method
• Spherical Bomb Method
Flat Flame Using Heat Flux Method 29 April, 2015 7/33
Flat FlameUsing Heat
Flux Method
Introduction
Aim
LaminarBurningVelocity
Heat FluxMethod
ExperimentalResult
NumericalMethod
Results AndDiscussions
ComputationalResult
Conclusions
Scope ofFuture Work
Laminar Burning Velocity
is defined as the relative velocity, of unburned reactantspropagating normal to the flame front.
SL = Ug
Flame Front
Unburnt Gas
Burner
Flat Flame Using Heat Flux Method 29 April, 2015 8/33
Flat FlameUsing Heat
Flux Method
Introduction
Aim
LaminarBurningVelocity
Heat FluxMethod
ExperimentalResult
NumericalMethod
Results AndDiscussions
ComputationalResult
Conclusions
Scope ofFuture Work
Laminar Burning Velocity
is defined as the relative velocity, of unburned reactantspropagating normal to the flame front.
SL = Ug
Flame Front
Unburnt Gas
Burner
Flat Flame Using Heat Flux Method 29 April, 2015 8/33
Flat FlameUsing Heat
Flux Method
Introduction
Aim
LaminarBurningVelocity
Heat FluxMethod
ExperimentalResult
NumericalMethod
Results AndDiscussions
ComputationalResult
Conclusions
Scope ofFuture Work
Figure 1: Complete Setup Of Heat Flux Method
11 12
3
7
4
6
1
2
5
8
9
10
A (1). Compressor (5). Methane Cylinder (9). Computer
(2). Air tank with pressure (6). Methane Rotameter (10). Sony Camera
(3). Valve (7). Burner Stand (11). Hotwater Chamber
(4). Air Rotameter (8). Burner with Flame (12). Coldwater Chamber
Experimetal Setup for Flat Flame Burner Using Heat Flux Method
Flat Flame Using Heat Flux Method 29 April, 2015 9/33
Flat FlameUsing Heat
Flux Method
Introduction
Aim
LaminarBurningVelocity
Heat FluxMethod
ExperimentalResult
NumericalMethod
Results AndDiscussions
ComputationalResult
Conclusions
Scope ofFuture Work
Heat Flux Method
The heat flux method is based on measuring the net heat lossfrom the flame to the burner.
Flat Flame Using Heat Flux Method 29 April, 2015 10/33
Flat FlameUsing Heat
Flux Method
Introduction
Aim
LaminarBurningVelocity
Heat FluxMethod
ExperimentalResult
NumericalMethod
Results AndDiscussions
ComputationalResult
Conclusions
Scope ofFuture Work
Heat Flux Method
The heat flux method is based on measuring the net heat lossfrom the flame to the burner.
Flat Flame Using Heat Flux Method 29 April, 2015 10/33
Flat FlameUsing Heat
Flux Method
Introduction
Aim
LaminarBurningVelocity
Heat FluxMethod
ExperimentalResult
NumericalMethod
Results AndDiscussions
ComputationalResult
Conclusions
Scope ofFuture Work
Energy Balance
To analyse the heat flux balance in the burner platequantitatively, we will consider the energy equation :
− ∂∂x
[λp,x(r)∂Tp
∂x
]− 1
r∂∂r
[λp,r (r)r ∂Tp
∂r
]= α(x)[Tg − Tp]
λ = Thermal Conductivity (for brass λ = 129Wm−1K−1)α = Volumetric Heat Transfer Coefficient (Wm−3K−1)p= Plateg = gasx and r are axial and radial direction respectively.Tp and Tg = f(x,r)
Flat Flame Using Heat Flux Method 29 April, 2015 11/33
Flat FlameUsing Heat
Flux Method
Introduction
Aim
LaminarBurningVelocity
Heat FluxMethod
ExperimentalResult
NumericalMethod
Results AndDiscussions
ComputationalResult
Conclusions
Scope ofFuture Work
Energy Balance
To analyse the heat flux balance in the burner platequantitatively, we will consider the energy equation :
− ∂∂x
[λp,x(r)∂Tp
∂x
]− 1
r∂∂r
[λp,r (r)r ∂Tp
∂r
]= α(x)[Tg − Tp]
λ = Thermal Conductivity (for brass λ = 129Wm−1K−1)α = Volumetric Heat Transfer Coefficient (Wm−3K−1)p= Plateg = gasx and r are axial and radial direction respectively.Tp and Tg = f(x,r)
Flat Flame Using Heat Flux Method 29 April, 2015 11/33
Flat FlameUsing Heat
Flux Method
Introduction
Aim
LaminarBurningVelocity
Heat FluxMethod
ExperimentalResult
NumericalMethod
Results AndDiscussions
ComputationalResult
Conclusions
Scope ofFuture Work
Energy Balance
To analyse the heat flux balance in the burner platequantitatively, we will consider the energy equation :
− ∂∂x
[λp,x(r)∂Tp
∂x
]− 1
r∂∂r
[λp,r (r)r ∂Tp
∂r
]= α(x)[Tg − Tp]
λ = Thermal Conductivity (for brass λ = 129Wm−1K−1)α = Volumetric Heat Transfer Coefficient (Wm−3K−1)p= Plateg = gasx and r are axial and radial direction respectively.Tp and Tg = f(x,r)
Flat Flame Using Heat Flux Method 29 April, 2015 11/33
Flat FlameUsing Heat
Flux Method
Introduction
Aim
LaminarBurningVelocity
Heat FluxMethod
ExperimentalResult
NumericalMethod
Results AndDiscussions
ComputationalResult
Conclusions
Scope ofFuture Work
−1r∂∂r
[λp,r (r)r ∂
∂r
∫ h
oTpdx
]=
∫ h
oα(x)[Tg − Tp]
+λp,x∂Tp
∂x|x=h − λp,x ∂Tp
∂x|x=0 = q(r)
Where as q is net heat transfer . For 1-D flame , q isindependent of r.
Avg .Temperature : Tp(r) = 1h
∫ h
oTpdx
• Temperature gradient along φ is zero because of symmetry.
• Also this is for steady state.
Flat Flame Using Heat Flux Method 29 April, 2015 12/33
Flat FlameUsing Heat
Flux Method
Introduction
Aim
LaminarBurningVelocity
Heat FluxMethod
ExperimentalResult
NumericalMethod
Results AndDiscussions
ComputationalResult
Conclusions
Scope ofFuture Work
−1r∂∂r
[λp,r (r)r ∂
∂r
∫ h
oTpdx
]=
∫ h
oα(x)[Tg − Tp]
+λp,x∂Tp
∂x|x=h − λp,x ∂Tp
∂x|x=0 = q(r)
Where as q is net heat transfer . For 1-D flame , q isindependent of r.
Avg .Temperature : Tp(r) = 1h
∫ h
oTpdx
• Temperature gradient along φ is zero because of symmetry.
• Also this is for steady state.
Flat Flame Using Heat Flux Method 29 April, 2015 12/33
Flat FlameUsing Heat
Flux Method
Introduction
Aim
LaminarBurningVelocity
Heat FluxMethod
ExperimentalResult
NumericalMethod
Results AndDiscussions
ComputationalResult
Conclusions
Scope ofFuture Work
−1r∂∂r
[λp,r (r)r ∂Tp(r)
∂r
]= q(r)
h
Assuming that the conduction coefficient λp,r does not dependon temperature, and therefore not on r , equation can be solvedeasily by Integrating over burner plate thickness x=0 to x=h.
Tp(r) = Tcenter − q4λh
r 2
Using the above equation relation between Tp and r isparabolic and axis symmetric.
Flat Flame Using Heat Flux Method 29 April, 2015 13/33
Flat FlameUsing Heat
Flux Method
Introduction
Aim
LaminarBurningVelocity
Heat FluxMethod
ExperimentalResult
NumericalMethod
Results AndDiscussions
ComputationalResult
Conclusions
Scope ofFuture Work
EXPERIMENTAL FACILITY
Figure 2: Burner Head
Flat Flame Using Heat Flux Method 29 April, 2015 13/33
Flat FlameUsing Heat
Flux Method
Introduction
Aim
LaminarBurningVelocity
Heat FluxMethod
ExperimentalResult
NumericalMethod
Results AndDiscussions
ComputationalResult
Conclusions
Scope ofFuture Work
The new burner3 is shown in Figure 1. It consists of a burnerhead, and a plenum chamber.
3Vaan Maaren.
Flat Flame Using Heat Flux Method 29 April, 2015 14/33
Flat FlameUsing Heat
Flux Method
Introduction
Aim
LaminarBurningVelocity
Heat FluxMethod
ExperimentalResult
NumericalMethod
Results AndDiscussions
ComputationalResult
Conclusions
Scope ofFuture Work
Burner Head
• Perforated Plate
• Heating/Cooling Jacket
Figure 3: Burner Head (Heating/Cooling Jacket)
Flat Flame Using Heat Flux Method 29 April, 2015 15/33
Flat FlameUsing Heat
Flux Method
Introduction
Aim
LaminarBurningVelocity
Heat FluxMethod
ExperimentalResult
NumericalMethod
Results AndDiscussions
ComputationalResult
Conclusions
Scope ofFuture Work
Plate Dia Thickness Hole Dia Pitch Pattern32 2 0.5 0.7 Hexagonal
Table 1: Perforated Plate Specification4
4All dimension are in mm
Flat Flame Using Heat Flux Method 29 April, 2015 16/33
Flat FlameUsing Heat
Flux Method
Introduction
Aim
LaminarBurningVelocity
Heat FluxMethod
ExperimentalResult
NumericalMethod
Results AndDiscussions
ComputationalResult
Conclusions
Scope ofFuture Work
Thermocouple
K-type thermocouples were attached to the brass plate having1.5 mm blind hole at different radial locations, as thetemperature distribution is constant in the tangential direction.
Figure 4: Thermocouple Temperature Variation
Flat Flame Using Heat Flux Method 29 April, 2015 17/33
Flat FlameUsing Heat
Flux Method
Introduction
Aim
LaminarBurningVelocity
Heat FluxMethod
ExperimentalResult
NumericalMethod
Results AndDiscussions
ComputationalResult
Conclusions
Scope ofFuture Work
Thermocouple
K-type thermocouples were attached to the brass plate having1.5 mm blind hole at different radial locations, as thetemperature distribution is constant in the tangential direction.
Figure 4: Thermocouple Temperature Variation
Flat Flame Using Heat Flux Method 29 April, 2015 17/33
Flat FlameUsing Heat
Flux Method
Introduction
Aim
LaminarBurningVelocity
Heat FluxMethod
ExperimentalResult
NumericalMethod
Results AndDiscussions
ComputationalResult
Conclusions
Scope ofFuture Work
Thermocouple
K-type thermocouples were attached to the brass plate having1.5 mm blind hole at different radial locations, as thetemperature distribution is constant in the tangential direction.
Figure 4: Thermocouple Temperature Variation
Flat Flame Using Heat Flux Method 29 April, 2015 17/33
Flat FlameUsing Heat
Flux Method
Introduction
Aim
LaminarBurningVelocity
Heat FluxMethod
ExperimentalResult
NumericalMethod
Results AndDiscussions
ComputationalResult
Conclusions
Scope ofFuture Work
Procedure
1 Supply the air for some time.
2 Supply the hot water in heating jacket and wait till theradial profile temperature of plate become uniform.
3 After that pass the methane and ignite the flame.
4 Wait for certain time for constant temperature.
5 Vary the velocity with keeping the equivalence ratioconstant and change the flow rate of air and CH4 usingrotameter.
6 Also change the equivalence ratio and find thecorresponding velocity.
Flat Flame Using Heat Flux Method 29 April, 2015 18/33
Flat FlameUsing Heat
Flux Method
Introduction
Aim
LaminarBurningVelocity
Heat FluxMethod
ExperimentalResult
NumericalMethod
Results AndDiscussions
ComputationalResult
Conclusions
Scope ofFuture Work
Procedure
1 Supply the air for some time.
2 Supply the hot water in heating jacket and wait till theradial profile temperature of plate become uniform.
3 After that pass the methane and ignite the flame.
4 Wait for certain time for constant temperature.
5 Vary the velocity with keeping the equivalence ratioconstant and change the flow rate of air and CH4 usingrotameter.
6 Also change the equivalence ratio and find thecorresponding velocity.
Flat Flame Using Heat Flux Method 29 April, 2015 18/33
Flat FlameUsing Heat
Flux Method
Introduction
Aim
LaminarBurningVelocity
Heat FluxMethod
ExperimentalResult
NumericalMethod
Results AndDiscussions
ComputationalResult
Conclusions
Scope ofFuture Work
Experimental Result:
Figure 5: Laminar Burning Velocity(Sl) vs Equivalence Ratios(φ)
Flat Flame Using Heat Flux Method 29 April, 2015 19/33
Flat FlameUsing Heat
Flux Method
Introduction
Aim
LaminarBurningVelocity
Heat FluxMethod
ExperimentalResult
NumericalMethod
Results AndDiscussions
ComputationalResult
Conclusions
Scope ofFuture Work
Figure 6: Uncertainity in Result of Present Study
Flat Flame Using Heat Flux Method 29 April, 2015 20/33
Flat FlameUsing Heat
Flux Method
Introduction
Aim
LaminarBurningVelocity
Heat FluxMethod
ExperimentalResult
NumericalMethod
Results AndDiscussions
ComputationalResult
Conclusions
Scope ofFuture Work
Numerical Method
Flat Flame Using Heat Flux Method 29 April, 2015 21/33
Flat FlameUsing Heat
Flux Method
Introduction
Aim
LaminarBurningVelocity
Heat FluxMethod
ExperimentalResult
NumericalMethod
Results AndDiscussions
ComputationalResult
Conclusions
Scope ofFuture Work
2-D Axis-symmetry Simulation
Quadrilateral 199,064
Total Cells 199,064
Total Points 200,550
Flat Flame Using Heat Flux Method 29 April, 2015 22/33
Flat FlameUsing Heat
Flux Method
Introduction
Aim
LaminarBurningVelocity
Heat FluxMethod
ExperimentalResult
NumericalMethod
Results AndDiscussions
ComputationalResult
Conclusions
Scope ofFuture Work
2-D Axis-symmetry Simulation
Quadrilateral 199,064
Total Cells 199,064
Total Points 200,550
Flat Flame Using Heat Flux Method 29 April, 2015 22/33
Flat FlameUsing Heat
Flux Method
Introduction
Aim
LaminarBurningVelocity
Heat FluxMethod
ExperimentalResult
NumericalMethod
Results AndDiscussions
ComputationalResult
Conclusions
Scope ofFuture Work
Pointwise Grid
2-D Computational Grid
Flat Flame Using Heat Flux Method 29 April, 2015 23/33
Flat FlameUsing Heat
Flux Method
Introduction
Aim
LaminarBurningVelocity
Heat FluxMethod
ExperimentalResult
NumericalMethod
Results AndDiscussions
ComputationalResult
Conclusions
Scope ofFuture Work
ANSYS-FLUENT Problem Setup
There are many options to specify when computational fluiddynamics model needs to be setup.
Table 2: Steps To solve Computational Fluid Dynamics Model
Solver Type Pressure-BasedViscous Model Laminar
Gravitational Effects OFF2D Space Axisymmetric
Pressure Velocity Coupling SIMPLEMomentum Equation Discretization Second-Order Upwind
Species Equation Discretization Second-Order UpwindEnergy Equation Discretization Second-Order Upwind
The viscous model was set to be laminar, since the Reynoldsnumber was kept ( Re< 2000) and the work is at steady state.
Flat Flame Using Heat Flux Method 29 April, 2015 24/33
Flat FlameUsing Heat
Flux Method
Introduction
Aim
LaminarBurningVelocity
Heat FluxMethod
ExperimentalResult
NumericalMethod
Results AndDiscussions
ComputationalResult
Conclusions
Scope ofFuture Work
• Gas : Ideal
• Flow : Laminar
• Inlet pressure : 1 atm
• Inlet Temperature : 300 K
• Fuel : Methane
• Oxidiser : Air
• Chemical Kinetics Scheme : Methane-AirSingle Step Chemistry
• Patching : 2400 K
• Adapation : Gradient Based
Flat Flame Using Heat Flux Method 29 April, 2015 25/33
Flat FlameUsing Heat
Flux Method
Introduction
Aim
LaminarBurningVelocity
Heat FluxMethod
ExperimentalResult
NumericalMethod
Results AndDiscussions
ComputationalResult
Conclusions
Scope ofFuture Work
Flat Flame Using Heat Flux Method 29 April, 2015 26/33
Flat FlameUsing Heat
Flux Method
Introduction
Aim
LaminarBurningVelocity
Heat FluxMethod
ExperimentalResult
NumericalMethod
Results AndDiscussions
ComputationalResult
Conclusions
Scope ofFuture Work
Results And Discussions
Computational Result:
Figure 7: Mass Fraction (CH4,O2,CO2,H2O) along with AxialCoordinate (m)
Flat Flame Using Heat Flux Method 29 April, 2015 27/33
Flat FlameUsing Heat
Flux Method
Introduction
Aim
LaminarBurningVelocity
Heat FluxMethod
ExperimentalResult
NumericalMethod
Results AndDiscussions
ComputationalResult
Conclusions
Scope ofFuture Work
3-D Simulation
Figure 8: 3-D Grid
Hexahedral 8,039250
Prism 127,710
Total Cells 8,166960
Total Points 8,398,954
Flat Flame Using Heat Flux Method 29 April, 2015 28/33
Flat FlameUsing Heat
Flux Method
Introduction
Aim
LaminarBurningVelocity
Heat FluxMethod
ExperimentalResult
NumericalMethod
Results AndDiscussions
ComputationalResult
Conclusions
Scope ofFuture Work
3-D Simulation
Figure 8: 3-D Grid
Hexahedral 8,039250
Prism 127,710
Total Cells 8,166960
Total Points 8,398,954
Flat Flame Using Heat Flux Method 29 April, 2015 28/33
Flat FlameUsing Heat
Flux Method
Introduction
Aim
LaminarBurningVelocity
Heat FluxMethod
ExperimentalResult
NumericalMethod
Results AndDiscussions
ComputationalResult
Conclusions
Scope ofFuture Work
Comparison between 2-D and 3-D result
Flat Flame Using Heat Flux Method 29 April, 2015 29/33
Flat FlameUsing Heat
Flux Method
Introduction
Aim
LaminarBurningVelocity
Heat FluxMethod
ExperimentalResult
NumericalMethod
Results AndDiscussions
ComputationalResult
Conclusions
Scope ofFuture Work
Comparison between 2-D and 3-D result conti..
Flat Flame Using Heat Flux Method 29 April, 2015 30/33
Flat FlameUsing Heat
Flux Method
Introduction
Aim
LaminarBurningVelocity
Heat FluxMethod
ExperimentalResult
NumericalMethod
Results AndDiscussions
ComputationalResult
Conclusions
Scope ofFuture Work
Conclusions
In this project work, the methane-air flames has beenanchored on the basis of the experiment , 2D and 3Dnumerical simulation of a perforated-plate burner.
The measured values of laminar burning velocity werecompared with the literature data and the comparison wasgood.
The flame height increase with the increase in the inletvelocity.
Comparision between 2-D and 3-D simulation was alsoreasonably good.
Flat Flame Using Heat Flux Method 29 April, 2015 31/33
Flat FlameUsing Heat
Flux Method
Introduction
Aim
LaminarBurningVelocity
Heat FluxMethod
ExperimentalResult
NumericalMethod
Results AndDiscussions
ComputationalResult
Conclusions
Scope ofFuture Work
Scope of Future Work
Future work can be continued through well developedmeasurement technique is as follows:
• Velocity measurement can also be calculated forpropagating flame by using other method like freelypropagating Spherical Flame Method.
• The present design can be modified more importantly withthe application of a microcontroller operated by itsappropriate programming to derive the desired result (as inthe form of velocity) directly on to the display.
• The setup is only suitable for gaseous fuels. So, this setupcan be modified for the measurement of burning velocityof liquid fuels.
• This setup can also be used for see the dilutant effect onlaminar burning velocity.
Flat Flame Using Heat Flux Method 29 April, 2015 32/33
Thank You!