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.
［1］何宝林.以孔板和皮托管为标准器的风速测量标准装置［J］.计量学报,2006,27（2）:124-127.
［2］盛森芝,沈熊,舒玮.流速测量技术［M］．北京:北京大学出版社.1987:41-44.
［3］沈熊.激光多普勒测速技术及应用［M］.清华大学出版社.1998:264-272.
［4］Terao Y, Choi Y M, Gutkin M, et al. Final report on the APMP air speed key comparison(APMP.M.FF-K3)［J］.Metrologia, 2010, 47(7), 88-94.
［5］ISO 3966—2008 measurement of fluid flow in closed conduits—Velocity area method using pitot static tube［S］.second edition. 2008: 14-28.
［6］McKeon B J, Li J, Jiang W, et al. Pitot probe corrections in fully developed turbulent pipe flow［J］. Meas sci Technol, 2003,14(8):1449-1458.
［7］Djenidi L,Antonia R A. LDA measurements in low Reynolds number turbulent boundary layer［J］. Experiments in Fluids, 1993, 14(1): 280-288.
［8］孙志强,周孑民,张宏建等.皮托管测量影响因素分析Ⅰ.检测杆与安装角的影响［J］.传感技术学报,2007,20(3):690-693.
［9］孙志强,周孑民,张宏建,等.皮托管测量影响因素分析 Ⅱ.全压孔与静压孔的影响［J］.传感技术学报传感技术学报,2007,20(4):941-944.
［10］王敏,周树道,王彦杰,等.影响皮托管测风精度的几个因素［J］.实验室研究与探索,2010,29(3):35-37.
2014, Vol. 35 
