摘要
燃料供给的实时、精确调节是冲压发动机技术研究的重点,对提高发动机的效率、改善发动机的工作性能具有重要的意义。为实现冲压发动机气态燃料在高温下流量的精确调节,提出了一种新型的拉瓦尔式燃料流量调节阀,以对流入发动机燃烧室的高温气态燃料进行流量调节。首先,开发了一种用于燃料供应的高温流量调节阀,然后通过采用有限元分析方法,分析了流经主阀阀口的气态燃料速度及压力的分布,从而找出了流量变化规律。研究结果表明,采用拉瓦尔管状阀口的流量调节阀,在不改变阀芯位移量以及一定入口压力条件下,流经阀口的燃料流量保持不变,且与出口压力无关。
It is the most important point for scramjet engine to control the supplying flow rate of fuel propely, and it is necessary to enhance the performance of the engine. In order to control the flow of gas fuel precisely in such high temperature situation in ramjet engines, a high flow control Laval valve for the ramjet engines was developed, which controls the gas flowing through the inlet passage of the engine. On this basis, a high temperature flow rate control valve for fuel supply was developed. Research on the characterristics of Laval nozzle mouth of the valve, and analysis on the velocity and pressure distribution with the finite element method were carried out. The research results indicate that, the rate of flow keeps the same when the opening of the valve and the inlet pressure are both fixed. The outlet pressure of the valve has no influence on the flow rate of the valve.
出处
《机电工程》
CAS
2012年第9期1036-1038,1045,共4页
Journal of Mechanical & Electrical Engineering
关键词
冲压发动机
拉瓦尔管
流量调节阀
流量特性
scramjet
Laval nozzle
flow-rate control valve
flow-rate characteristics
