Critical pressure ratio and discharge coefficient for Two-dimensional sonic nozzles at Re=2.5 x 10~3-2.7 x 10~5 (effects of throat width)

摘要

We present the characteristics of the critical pressure and discharge coefficient on the two- dimensional sonic nozzles at a low Reynolds number. The geometric shape of the nozzle is based on the ISO 9300 sonic-venturi nozzle. The two-dimensional sonic nozzles of five different width were used in order to get low Reynolds numbers. The static pressure distribution along the wall of the nozzle and the behavior of the shock wave in the nozzle are shown.