CRITICAL FLOW SONIC NOZZLES GAS FLOW FACILITY WITH MEDIUM-PRESSURE AND CLOSED-LOOP PIPELINES

Sun Lijun, Feng Qianqian, Li Shengjie, Tang Bing, Zhang Tao

Abstract

The requirement of gas flow facility with high pressure is increasing. But, the experiences of development the closed-loop high pressure facility are not enough. Critical flow sonic Nozzles gas flow facility with medium-pressure and Closed-Loop pipelines at Tianjin University Flow Lab was presented in the paper. The performance indexes, the flow loop, the uncertainty analysis of the facility were described. Discharge coefficient correction of nozzles at medium pressure and the flow rate stability control were shown in detail. The pressure of the facility is 0.3 ~ 1.6 MPa, the flow rate is 0.5 ~ 120 m³/h at working status, the uncertainty is better than 0.3% (<i>k</i> = 2).

Keywords

micro flow, leak rate, dilution method, capillary

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IMEKO-TC9-2013-027.pdf

DOI

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IMEKO TC

TC9 - Flow Measurement

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