Effect of swirling vanes on performance of steam–water jet injector

Abstract

The effect of water swirling vanes and steam swirling vanes on the steam–water jet injector with central water nozzle was experimentally investigated. The performance of the steam–water jet injector with water/steam swirling vanes was compared with that without swirling vanes. The exergy analysis was also carried out. According to the experimental results and analysis, the water swirling vanes could effectively enhance the performance of the jet injector, but the steam swirling vanes weakened the performance of the jet injector. When the water swirling vanes were equipped, the maximum amplitudes of increase in the entrainment ratio and exergy efficiency were 172% and 93%, respectively, and the highest inlet water temperature increased from 70 °C to 80 °C. The performance of steam–water jet injector with water swirling vanes was also investigated. The results showed that the entrainment ratio decreased with the increase of the inlet water pressure and temperature, and increased with the increase of inlet steam pressure. The resistance coefficients increased with the increase of the inlet water pressure and temperature, and decreased with the increase of inlet steam pressure.