Influence of Compressor Deterioration on Engine Dynamic Behavior and Transient Stall-MarginSource: Journal of Turbomachinery:;2000:;volume( 122 ):;issue: 003::page 477Author:Z. S. Spakovszky
,
J. B. Gertz
,
J. D. Paduano
,
A. H. Epstein
,
O. P. Sharma
,
E. M. Greitzer
DOI: 10.1115/1.1303817Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: This paper presents an experimental and analytical investigation of compressor stability assessment during engine transient operation. A two-dimensional, linear, compressible, state-space analysis of stall-inception (Feulner et al., 1996, ASME J. Turbomach., 118 , pp. 1–10) was modified to account for engine transients and deterioration, with the latter modeled as increased tip-clearance and flow blockage. Experiments were performed on large commercial aircraft engines in both undeteriorated and deteriorated states. Unsteady measurements of pressure in these test engines during rapid accelerations revealed the growth of pre-stall disturbances, which rotate at rotor speed and at approximately half rotor speed. These disturbances are stronger in deteriorated engines. The model showed that the signal at shaft speed was the first compressible system mode, whose frequency is near shaft speed, excited by geometric nonuniformities. The computed behavior of this mode during throttle transients closely matched engine data. The signal increased in strength as stall was approached and as the engine deteriorated. This work firmly establishes the connection between observed signals in the these engines and first principles stability models. [S0889-504X(00)01603-2]
keyword(s): Pressure , Engines , Compressors , Rotors , Signals , Flow (Dynamics) , Stability AND Measurement ,
|
Collections
Show full item record
contributor author | Z. S. Spakovszky | |
contributor author | J. B. Gertz | |
contributor author | J. D. Paduano | |
contributor author | A. H. Epstein | |
contributor author | O. P. Sharma | |
contributor author | E. M. Greitzer | |
date accessioned | 2017-05-09T00:03:37Z | |
date available | 2017-05-09T00:03:37Z | |
date copyright | July, 2000 | |
date issued | 2000 | |
identifier issn | 0889-504X | |
identifier other | JOTUEI-28679#477_1.pdf | |
identifier uri | http://yetl.yabesh.ir/yetl/handle/yetl/124466 | |
description abstract | This paper presents an experimental and analytical investigation of compressor stability assessment during engine transient operation. A two-dimensional, linear, compressible, state-space analysis of stall-inception (Feulner et al., 1996, ASME J. Turbomach., 118 , pp. 1–10) was modified to account for engine transients and deterioration, with the latter modeled as increased tip-clearance and flow blockage. Experiments were performed on large commercial aircraft engines in both undeteriorated and deteriorated states. Unsteady measurements of pressure in these test engines during rapid accelerations revealed the growth of pre-stall disturbances, which rotate at rotor speed and at approximately half rotor speed. These disturbances are stronger in deteriorated engines. The model showed that the signal at shaft speed was the first compressible system mode, whose frequency is near shaft speed, excited by geometric nonuniformities. The computed behavior of this mode during throttle transients closely matched engine data. The signal increased in strength as stall was approached and as the engine deteriorated. This work firmly establishes the connection between observed signals in the these engines and first principles stability models. [S0889-504X(00)01603-2] | |
publisher | The American Society of Mechanical Engineers (ASME) | |
title | Influence of Compressor Deterioration on Engine Dynamic Behavior and Transient Stall-Margin | |
type | Journal Paper | |
journal volume | 122 | |
journal issue | 3 | |
journal title | Journal of Turbomachinery | |
identifier doi | 10.1115/1.1303817 | |
journal fristpage | 477 | |
journal lastpage | 484 | |
identifier eissn | 1528-8900 | |
keywords | Pressure | |
keywords | Engines | |
keywords | Compressors | |
keywords | Rotors | |
keywords | Signals | |
keywords | Flow (Dynamics) | |
keywords | Stability AND Measurement | |
tree | Journal of Turbomachinery:;2000:;volume( 122 ):;issue: 003 | |
contenttype | Fulltext |