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CompressorStall
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PISTON ENGINE
GAS TURBINEENGINE
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TURBOPROP
TURBOJET
TURBOSHAFT
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TURBOFAN
AFTERBURNINGTURBOFAN/TRUBOJE
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COMPRESSION
PISTON ENGINES= COMPRESSION
RATIO
GAS TURBINE ENGINES
= PRESSURE RATIO /OVERALL PRESSURE RATIO
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COMPRESSION
PISTON ENGINES=COMPRESSION
RATIO
GAS TURBINE ENGINES
= PRESSURE RATIO /OVERALL PRESSURE RATIO
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COMPRESSION
CR = VOLUME DECREASE
PR = PRESSURE INCREASE!!!
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Axial Compressors
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Compressors Stall / Surge
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STALLED
CELL
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2 Types of Flow Separation
1.Positive Stalling Flow
Separation
suction sie of
!lae
2."egative Stalling Flow
Separation pressure sie of !lae
"#T$% stall is most li&ely to 'appen on t'e
suction sie of t'e !lae.
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2 T(P$S #F C#)P*$SS#*
ST ++ / S,*-$
1.ROTATING STALL (TransientSta!
".A#I$S%MMETRIC STALL /
COMPRESSOR SURGE (H&n'
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Causes
1.Frei'n )*e+t s&+tin / )ir, stri-e
". Interna En'ine Fai&res
.Pne&ati+ Bee, Ma0&n+tins. Interna Cearan+e C2an'es
3.Air+ra0t 4eratin &tsi,e its
,esi'n en5e4e6.En'ine 4eratin &tsi,e its 7i'2t
an&a 4r+e,&res
8.T&r)&ent r 2t air79 int t2e
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Cate'ries 0 Sta
1.Re+5era)e sta
a! N Cre9 A+tinRe:&ire,
)! Re:&ires Cre9 a+tin
".Nn$re+5era)e sta
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C4ressr sta
1. Ta-e$;
". Ci)
. Ats42eri+ F&+t&atins
. E
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Developmets
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Developmets
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Developmets
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Developmets
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Developmets
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