1. Zhejiang Province Institute of Metrology, Hangzhou, Zhejiang 310013, China
2. Hangzhou Tianma Metrology Science and Technology Ltd., Hangzhou, Zhejiang 310013, China
Abstract：In view of the shortcomings existed in the low reynolds number critical flow nozzles such as the difficulties of geometric measurement in small throat radius and the test of back pressure ratio on existing PVTt standard facility, an the active piston flow comparator is developed. According to the principle of mass conservation, a flying test method based on PcTt is presented. Test results show that the flying test method is accurate and feasible. The repeatability of discharge coefficient Cd is up to (0.02～0.05)%.
沈文新,詹志杰,金岚,马小平. 基于质量守恒原理的临界流喷嘴动态检定方法研究[J]. 计量学报, 2011, 32(3): 213-216.
SHEN Wen-xin,ZHAN Zhi-jie,JIN Lan,MA Xiao-ping. The Critical Flow Nozzles Flying Test MethodBased on the Principle of Mass Conservation. Acta Metrologica Sinica, 2011, 32(3): 213-216.
［1］王自和.低雷诺数下临界流文丘里喷嘴的背压比［C］//2006年全国流量计量学术交流会,郑州, 2006, 215-221.
［2］JJG 620-2008,临界流文丘里喷嘴 ［S］.
［3］Kramer R B, Dopheide M D. Actively driven piston prover for the calibration of sonic nozzles［C］//The 14th International Flow Measurement Conference, Flomeko, Johannesburg, 2007, 18-21.
［4］李春辉,王池.音速喷嘴扩散段形状对流出系数的影响［J］. 计量学报, 2008, 29(5):423-426.
［5］李春辉,王池.临界流喷嘴数值模拟研究初探［J］. 计量技术, 2006, (10):7-9.
［6］Wang C, Li X, Duan H M,et al.Establishment of Piston Devices［C］//The 12th International Flow Measurement Conference, Flomeko, Guilin,Guangxi,China, 2004, 14-17.
2011, Vol. 32 
