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CompressorStall

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PISTON ENGINE

GAS TURBINEENGINE

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TURBOPROP

TURBOJET

TURBOSHAFT

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4/23

TURBOFAN

AFTERBURNINGTURBOFAN/TRUBOJE

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5/23

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6/23

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COMPRESSION

PISTON ENGINES= COMPRESSION

RATIO

GAS TURBINE ENGINES

= PRESSURE RATIO /OVERALL PRESSURE RATIO

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8/23

COMPRESSION

PISTON ENGINES=COMPRESSION

RATIO

GAS TURBINE ENGINES

= PRESSURE RATIO /OVERALL PRESSURE RATIO

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9/23

COMPRESSION

CR = VOLUME DECREASE

PR = PRESSURE INCREASE!!!

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10/23

Axial Compressors

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11/23

Compressors Stall / Surge

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STALLED

CELL

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13/23

2 Types of Flow Separation

1.Positive Stalling Flow

Separation

suction sie of

!lae

2."egative Stalling Flow

Separation pressure sie of !lae

"#T$% stall is most li&ely to 'appen on t'e

suction sie of t'e !lae.

7/25/2019 Gte Report

14/23

2 T(P$S #F C#)P*$SS#*

ST ++ / S,*-$

1.ROTATING STALL (TransientSta!

".A#I$S%MMETRIC STALL /

COMPRESSOR SURGE (H&n'

7/25/2019 Gte Report

15/23

Causes

1.Frei'n )*e+t s&+tin / )ir, stri-e

". Interna En'ine Fai&res

.Pne&ati+ Bee, Ma0&n+tins. Interna Cearan+e C2an'es

3.Air+ra0t 4eratin &tsi,e its

,esi'n en5e4e6.En'ine 4eratin &tsi,e its 7i'2t

an&a 4r+e,&res

8.T&r)&ent r 2t air79 int t2e

7/25/2019 Gte Report

16/23

Cate'ries 0 Sta

1.Re+5era)e sta

a! N Cre9 A+tinRe:&ire,

)! Re:&ires Cre9 a+tin

".Nn$re+5era)e sta

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C4ressr sta

1. Ta-e$;

". Ci)

. Ats42eri+ F&+t&atins

. E

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18/23

Developmets

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19/23

Developmets

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20/23

Developmets

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21/23

Developmets

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22/23

Developmets

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23/23