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| The Dual-chamber Negative Pressure Method for Dynamic Pressure Calibration of the Shock Tube |
| YANG Jun1,LI Cheng1,WANG Wei2,FAN Jing1 |
1.Changcheng Institute of Metrology and Measurement, Beijing 100095, China
2.China Gas Turbine Establishment, Jiangyou, Sichuan 621703, China |
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Abstract A dual-chamber negative pressure method(DCNPM) with shock tube was investigated to get micro step pressure. Using CIMM’s 100 mm shock tube and other additional installations, several absolute pressure sensors and micro pressure sensors were tested with DCNPM. The test data indicate that less than 2 kPa step pressure can be get in shock tube with DCNPM and thin paper film, and the step pressure parameters like rise time and flat duration comform to the national metrology regulation. Thereby the technical capability of the existing shock tube is extended. The sensors test results with different static pressure and pressure amplitude were compared, and the resonant frequency and damping ratio increased with the pressure. So it is worth to pay attention in practical calibration and test.
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2012, Vol. 33 
