ASME Power The resource for the Power Industry Professional EXPERIMENTAL INVESTIGATION AND NUMERICAL SIMULATION OF LIQUID DROPLET VAPORIZATION IN A COMPRESSION SYSTEM WITH WET COMPRESSION

ABSTRACT Experimental study of spray cooling system with wet compression has been carried out on a small hot wind tunnel. A mathematical model is established for liquid droplets evaporization and a 3D calculation bound on the model have been carried out. The results are in good accord with the experimental data. This paper will be good reference for spray system design for a wet compression system. And the detail information of the experiment and numerical computation take us further understanding of the real wet compression process. INTRODUCTION Wet compression on gas turbine have been brought forward very early. R.V. Kleinschmidt listed its advantages and pointed out that wet compression makes compression process approximated to isothermal compression process and such increasing engine efficient of gas turbine In the last decade, wet compression has being a widely used technology and the research about which have been a hotspot in turbo machine-dynamics. LM6000 SPRINT unit of GE, GT9D gas turbine of ALSTOM and W501D5A gas turbine of Siemense Thermodynamic analysis of wet compression was done in In order to investigate the real process of liquid droplets evaporizations in wet compression condition and to understand the thermodynamic process of such a technique, experimental studies of spray and evaporization have been carried out upon a small hot wind tunnel at Harbin Engineering University. Combining with theory analysis, we can say that second breakup and evaporization do great influence on particles diameters. And the high-speed of continue phase does benefit to particles breakup, but the influence on particles evaporization is not distinct. On the other hand, the particles evaporization rate is very sensitive to the temperature of continue phase. Numerical simulation was carried out, with the math model developed here, with FLUENT code. The calculation results show that the relative humidity declines very quickly in the airflow. So we can make use of the increased evaporation by indeed injecting more water (more water is injected than required for 100% relative humidity) and thus making use of the decline of relative humidity in the compressor