Numerical investigation of roughness effect on wet steam ejector performance in the refrigeration cycle

Machining operation and presence of water droplets cause increase the surface roughness wet steam ejector walls change its performance in refrigeration cycle. The purpose this work is to investigate influences primary nozzle on ejectors cycle with as a working flow. Eulerian-Eulerian model validated by comparison numerical results experimental data. Moreover, different has been successfully applied nozzle, effect entire flow shown. Six properties are selected, including pressure, temperature, Mach number, average droplet radius, growth rate, liquid mass fraction. result shows increasing resulted shift shock chain damping strength, rising temperature diffuser. In addition, increment decreases ER COP 3.67% 3.8%, respectively. designers operators should be considered effects design due vital impact fraction, ER, COP.