大压缩比两级燃气引射系统参数匹配试验研究
Experimental investigation on parameter matching of high compression-ratio two-stage gas ejector system
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摘要: 建立了单模块两级超声速环形引射系统，采用不同参数的高温燃气分别作为一二级引射器驱动工质，对二级引射器单独启动特性、两级引射器自身参数匹配特性及有负载情况下系统匹配特性进行了试验研究。研究结果表明：二级引射器单独启动存在流量下限；两级引射器自身参数匹配范围是比较宽的，但在有负载情况下，其匹配范围大为缩小；对于多级引射而言，各级引射气体压力与负载压力的相互匹配至关重要。Abstract: A single-module two-stage ejector test facility was established to investigate the supersonic ejector performance, and hot gases with various were used as parameters first-stage and second-stage driving fluids. The investigation indicates that there is a lower limit of flux when second-stage ejector start alone, and the parameter matching range is relatively wide for the system itself, but the parameter matching range will reduce greatly for the system with load. Pressure matching is a all-important question for multi-stage ejector.
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Key words:
- ejector /
- high vacuum /
- two-stage gas ejector /
- parameter matching
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