摘要
为了讨论皮托管全压孔和静压孔几何参数对其测量特性的影响,采用试验和数值模拟相结合的方法,对不同型号的皮托管进行了研究.结果表明:对于皮托管全压,在流速较低时,由较小的全压孔测得的全压较接近参考值,而在流速较大时,大多数全压孔的测量值误差都比较大;对于皮托管静压,由较小外径的检测杆测得的静压值较接近参考值,静压孔不宜布置在太靠近测头或竖直检测杆的地方.这些结论为优化皮托管的测量提供了指导.
Experiments and numerical simulations were conducted on various Pitot tubes in order to study the effect of the geometrical parameters on their measurement characteristics. The results show that for the total pressures of a Pitot tube, those values obtained from a small total port were closer to the reference value in the lower velocity, whereas in the higher velocity, most measured results were of large errors. As for the static pressures of a Pitot tube, those values obtained from a smaller air horn were closer to the reference value, and it is noted that the static ports can not be located too near to the tip and end of the air horn. These findings provide guidance for optimizing the performance of a Pitot tube under nonstandard conditions.
出处
《传感技术学报》
CAS
CSCD
北大核心
2007年第4期941-944,共4页
Chinese Journal of Sensors and Actuators
基金
教育部高等学校博士学科点专项科研基金资助(20030335058)
关键词
流速测量
影响因素
空气试验
数值模拟
皮托管
全压孔
静压孔
flow measurement
influencing factor
airflow experiment
numerical simulation
Pitot tube
total port
static port
