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Theoretical analysis of the effect of water and ethanol injection on axial compressor instabilities

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Title Theoretical analysis of the effect of water and ethanol injection on axial compressor instabilities
 
Creator KANT, P
KRISHNA, BSK
PRADEEP, AM
KUMAR, S
 
Subject ROTATING STALL
FLOW COMPRESSORS
GAS-TURBINE
SURGE
DISTURBANCES
PERFORMANCE
Moore-Grietzers' model
Compressor instabilities
Liquid injection
Rotating stall
Surge
 
Description Two types of instabilities that occur in compression systems rotating stall and surge have an adverse effect on the compressor performance. Several techniques have been explored to minimize the effect of these instabilities. It has been observed that injection of a liquid into the compressor not only improves thermodynamic efficiencies but also results in stabilizing the system. Therefore, water and ethanol injection has been investigated as an effective tool for controlling these compressor instabilities. In the present paper a modified Moore-Greitzer model has been proposed for wet compression-based system using water and ethanol. Under this work the effect of injection of water (1) at various stages of compressor, (2) at different altitudes and (3) by varying amounts has also been presented. The effect of various parameters on wet compression such as (a) Optimum stage for liquid injection (b) Optimum amount of liquid injection and (c) Effect of altitude on liquid injection is also examined in the present work which shows that the liquid injection helps in improving the performance of compression systems in terms of increase in the stall margin and pressure rise coefficient. (C) 2011 Elsevier Ltd. All rights reserved.
 
Publisher PERGAMON-ELSEVIER SCIENCE LTD
 
Date 2012-06-26T06:13:07Z
2012-06-26T06:13:07Z
2011
 
Type Article
 
Identifier APPLIED THERMAL ENGINEERING,31(10)1703-1711
1359-4311
http://dx.doi.org/10.1016/j.applthermaleng.2011.02.012
http://dspace.library.iitb.ac.in/jspui/handle/100/14017
 
Language English