Abstract
Wet compression systems increase the useful power output of a gas turbine by reducing the compressor work through the reduction of air temperature inside the compressor. The actual wet compression process differs from the conventional single phase compression process due to the presence of latent heat component being absorbed by the evaporating water droplets. Thus the wet compression process cannot be assumed isentropic. In the current investigation, the gas-liquid two phase has been modeled as air containing dispersed water droplets inside a simple cylinder-piston system. The piston moves in the axial direction inside the cylinder to achieve wet compression. Effects on the thermodynamic properties such as temperature, pressure and relative humidity are investigated in detail for different parameters such as compression speeds and overspray. An analytical model is derived and the requisite thermodynamic curves are generated. The deviations of generated thermodynamic curves from the dry isentropic curves (PVγ = constant) are analyzed.
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Recommended by Associate Editor Jun Sang Park
Heuy Dong Kim received his B.S. and M.S. degrees in Mechanical Engineering from Kyungpook National University, Korea, in 1986 and 1988, respectively. He then received his Ph.D. from Kyushu University, Japan, in 1991. Currently, he is a Professor at Andong National University, Korea. His research interests include turbomachinery, ramjet and scramjet, shock tube and technology, shock wave dynamics, explosions and blast waves, flow measurement, aerodynamic noise, and supersonic wind tunnels.
Abhay Mohan received his B.S. degree in Mechanical Engineering from the University of Kerala, India, in 2008. Then he worked in aerospace industry for close to five years. Currently, he is pursuing his Master’s degree at Andong National University, Korea. His research interests include CFD and turbomachinery flows.
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Mohan, A., Chidambaram, P.K., Suryan, A. et al. Thermo-fluid dynamic analysis of wet compression process. J Mech Sci Technol 30, 5473–5483 (2016). https://doi.org/10.1007/s12206-016-1115-4
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DOI: https://doi.org/10.1007/s12206-016-1115-4