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HYPERLOOP CFD Analysis

Objective

To calculate aerodynamic load on the pods at its top speed, fnd out where ow

separation occurs, observe the shocks ormed and to optimize the exterior shape o

the pod.

Problem physics

Since pure vacuum is not easible to produce the tubes are maintained at 1 !a

pressure and a temperature o "# by usin$ pumps.

%n reality the pod accelerates to its top speed o &' mph in one minute. (owever

or the simulation % have assumed the pod accelerates to its top speed o &'mph

instantaneously at start time o analysis. The pod aerodynamics is studied without

considerin$ the e)ect o compressor intake or now. The air in ront o the pod which

tries to ow throu$h the bypass area * between pod and tube + $ets choked. This airis accumulated in ront o the pod thereby increasin$ pressure in the ront o the

pod*the pod acts like a piston compressin$ the air in ront o it+.The air which

mana$es to pass throu$h the bypass expands when it reaches the back o the pod

reachin$ supersonic speeds. ddin$ a compressor intake at the ront can reduce the

e)ect but cannot eliminate the problem o air accumulation at the ront due to the

desi$n constraints o an intake system.

Tube dimensions *in inches+ are as $iven below

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Computational domain

-omputational domain as modeled in -T%. This is a case o pod without an intake.

nly hal o the tube and pod is modeled by takin$ symmetry into account.

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eshin!

/nstructured tetra0prism mesh usin$ elauney method. 2efnements are made only

in the boundary layers and in the wake re$ion. !rism layers are used at the

boundaries.

3irst the mesh was $enerated usin$ ctree method and then elauney method wasused later $enerate the fnal mesh usin$ the ormer mesh.

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"O#$DARY CO$D%&%O$'The wall boundaries apart rom the pod itsel are movin$ with the velocity o the

pod in a rame o reerence attached to the pod. The pod is ali$ned alon$ the 45axis

lon$itudinally and velocity o pod is in the positive 45direction.

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Dynamic (radient Adaptive esh

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CO$CL#'%O$

ll the iterations in each time step was conver$ed.

nly 1.e5" seconds o ow was simulated.