Compressor intercooling has traditionally been employed to reduce compressor work and augment gas turbine output power. Conventional intercooling schemes are usually applied through nonmixed heat exchangers between two compressor stages or by cooling the outside of the compressor casing. Any cooling schemes that may affect the flow field inside the compressors have not been favorably considered due to concerns of any disturbance that might adversely affect the compressor’s performance stability. As the inlet fog cooling scheme has become popular as an economic and effective means to augment gas turbine output power on hot or dry days, consideration has been given to applying fog cooling inside the compressors by injecting fine water droplets between stages (i.e., interstage fogging). This paper focuses on developing a stage-by-stage wet compression theory for overspray and interstage fogging that includes the analysis and effect of preheating and precooling at each small stage of the overall compressor performance. An algorithm has been developed to calculate the local velocity diagram and allow a stage-by-stage analysis of the fogging effect on airfoil aerodynamics and loading with known 2D meanline rotor and stator geometries. Thermal equilibrium model for water droplet evaporation is adopted. The developed theory and algorithm are integrated into the systemwise FogGT program to calculate the overall gas turbine system performance.
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September 2010
Research Papers
Overspray and Interstage Fog Cooling in Gas Turbine Compressor Using Stage-Stacking Scheme—Part I: Development of Theory and Algorithm
Ting Wang,
Ting Wang
Energy Conversion & Conservation Center,
University of New Orleans
, New Orleans, LA 70148-2220
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Jobaidur R. Khan
Jobaidur R. Khan
Energy Conversion & Conservation Center,
University of New Orleans
, New Orleans, LA 70148-2220
Search for other works by this author on:
Ting Wang
Energy Conversion & Conservation Center,
University of New Orleans
, New Orleans, LA 70148-2220
Jobaidur R. Khan
Energy Conversion & Conservation Center,
University of New Orleans
, New Orleans, LA 70148-2220J. Thermal Sci. Eng. Appl. Sep 2010, 2(3): 031001 (10 pages)
Published Online: November 17, 2010
Article history
Received:
May 11, 2010
Revised:
September 21, 2010
Online:
November 17, 2010
Published:
November 17, 2010
Connected Content
A companion article has been published:
Overspray and Interstage Fog Cooling in Gas Turbine Compressor Using Stage-Stacking Scheme—Part II: Case Study
Citation
Wang, T., and Khan, J. R. (November 17, 2010). "Overspray and Interstage Fog Cooling in Gas Turbine Compressor Using Stage-Stacking Scheme—Part I: Development of Theory and Algorithm." ASME. J. Thermal Sci. Eng. Appl. September 2010; 2(3): 031001. https://doi.org/10.1115/1.4002754
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