超音速环形蒸汽引射器启动特性试验研究

Experimental investigation on start performance of supersonic steam annual ejector

为考察超音速环形蒸汽引射器启动特性,在地面试验台上,对采用不同蒸汽喷嘴的超音速环形蒸汽引射器模型启动关机过程中参数动态变化趋势进行了试验研究。试验结果表明:随着蒸汽喷嘴扩张角(0～20°)的增加,真空舱内极限真空压力增加,环引最小启动压力变化不明显,且关机段最小失稳压力低于启动段最小启动压力。

Experiment of a supersonic steam annual ejector was conducted at ground-test bench. Test results show that vacuum pressure increase gradually and minimal start pressure change significantly with the increase of steam nozzle expanding angle. During the shutdown phase, the malfunction pressure is lower than minimal start pressure.