Experimental Investigation of a Reciprocating Double-plunger Gas Flow Standard Device
XU Chun-wei1,ZHANG Gao-ming2,XU Zhi-peng2
1. Zhejiang Institute of Mechanical & Electrical Engineering, Hangzhou, Zhejiang 310053, China
2. Zhejiang Provincial Key Laboratory of Flow Measurement Technology, China Jiliang University,
Hangzhou, Zhejiang 310018, China
Abstract：To solve the problems of restricted dimension of cylinder and limited flow range of the plunger gas flow standard devices, a reciprocating double-plunger gas flow standard device was developed, operating modes including single-cylinder, parallel double-cylinder and tandem double-cylinder modes were explored. For different operating modes, the repeatability and accuracy of the device were verified by the calibration experiment of a sonic nozzle with the nominal flow rate of 0.06m3/h. Results revealed that the repetitive rate of the device was less than 0.02% at different modes, the errors of the device at single-cylinder and parallel double-cylinder modes were less than 0.02%, while the error of the device at tandem double-cylinder mode was less than 0.05%.
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