小流量气体流量的测量方法及应用  

The method and application of small gaseous mass flow rate measurement system

作　　者：曹智程[1] 费立森[1] 

机构地区：[1]西安航天动力研究所,陕西西安710100

出　　处：《火箭推进》2009年第3期34-37,共4页Journal of Rocket Propulsion

摘　　要：介绍了小流量气体流量测量装置的原理和应用背景,建立了小流量气体测量系统。采用两种实验方法,即质量流量计串连孔板测量法和孔板配合差压测量法,进行了测量,得到小流量拟合公式。比较了不同实验方法的精度和特点。结果表明,第二种方法重复性好,测量精度高。New approch to the control and measurement of small gaseous mass flow rate is needed when the mass flow rate is too small to be measured by traditional flow meter. In this paper, the background and principle of the instrumentation system for small gaseous mass flow rate measurement are presented. The instrumentation system were set up. Two means, namely, the small mass flow rate measurement by tandem arranged orifice plate and mass flow rate meter, and small mass flow rate measurement with orifice plate and differential pressure were tested. Different fitting equations were obtained. The accuracy and characteristics of the two methods were also compared. The results show that the second method has reasonable repeatability and the accuracy has improved effectively.

关 键 词：地面试验 流量计 气体小流量 

分 类 号：V434[航空宇航科学与技术—航空宇航推进理论与工程]