基于激光多普勒测速仪的皮托管校准实验研究

doi:10.3969/j.issn.1000-1158.2014.06.18

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摘要用皮托管测量风速时需要其校准系数α来修正测量结果,激光多普勒测速仪可用于皮托管的校准。在校准过程中,皮托管探头附近的绕流和实验段流场在轴线上的速度分布偏差会影响校准结果。为评估或修正这些影响进行了实验研究,实验结果表明:皮托管探头对原有流场的干扰会影响α的校准结果,因此校准时须找到合理的激光多普勒测速仪测量位置以尽可能地避免这种影响;实验段流场轴线上固有的速度分布偏差也会影响校准结果,这种影响可以通过实际测量来修正。

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	崔骊水
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关键词 ：计量学, 风速, 校准, 皮托管, 激光多普勒测速仪

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.

Key words： Metrology; Air velocity; Calibration; Pitot -tube; Laser doppler anemometer

基金资助:科技部科技支撑项目(2013BAK12B01)

作者简介: 崔骊水(1979-),男,陕西榆林人,中国计量科学研究院副研究员,硕士,主要研究方向为气体流速和流量计量。cuils@nim.ac.cn

引用本文:

崔骊水,胡鹤鸣,李春辉. 基于激光多普勒测速仪的皮托管校准实验研究[J]. 计量学报, 2014, 35(6): 603-606.
CUI Li-shui,HU He-ming,LI Chun-hui. Experimental Investigation to Calibrate Pitot-tube by Laser Doppler Anemometer. Acta Metrologica Sinica, 2014, 35(6): 603-606.

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http://jlxb.china-csm.org:81/Jwk_jlxb/CN/10.3969/j.issn.1000-1158.2014.06.18 或 http://jlxb.china-csm.org:81/Jwk_jlxb/CN/Y2014/V35/I6/603