EVAPORATION BEHAVIOR OF WATER DROPLETS FLOWING THROUGH AXIAL FLOW COMPRESSORS

摘要

Evaporation of a water droplet flowing through an axial flow compressor is studied theoretically and experimentally. A droplet evaporation model applicable to a rapid change of ambient air temperature is proposed. Change in droplet diameter, evaporation rate and resultant temperature decrease of the ambient air are calculated with the effect of heat absorbed by the water in the droplet taken into consideration. The model has been verified by fundamental experiment using a high temperature wind tunnel. Cumulative evaporation profile along axial position is estimated by the model for the compressor of a heavy duty gas turbine and design considerations with respect to diameter of the atomized water droplet are made for practical application.