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| Experimental Investigation to Calibrate Pitot-tube by Laser Doppler Anemometer |
| CUI Li-shui1,2,HU He-ming2,LI Chun-hui2 |
1. Beijing Institute of Technology, Beijing 100081, China;
2. National Institute of Metrology, Beijing 100029, China |
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Abstract Pitot -tube is widely used to measure the air velocity. The coefficient α must be calibrated to correct the measurement result.Laser Doppler anemometer can be applied to calibrate Pitot-tube to acquire the coefficient α. During the process, the calibration result can be influenced by the flow round the probe of Pitot-tube and air velocity distribution deviation in long axis. The experiments are conducted to evaluate or correct this influence. The results show the calibration results will be different due to the interference of probe mounted in flow field. For this reason the proper measurement position for laser doppler anemometer is required to reduce the influence as much as possible. The inherent air velocity distribution deviation also influences the calibration result of α. This influence can be corrected by actual measurement.
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2014, Vol. 35 
