摘要
影响皮托管测量风速的因素很多,主要从气体压缩性、全压孔尺寸、静压孔位置及压力损失等方面对风速的影响进行了探讨。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,除对风速引入压缩性、压损修正系数外,全压孔内外径之比应选在0.5且内径越小越好,静压孔选在距离全压孔7倍于内径位置处,此时测量误差最小。
Measurement of wind speed using a pitot tube is affected by various factors.This article explores the influen-cing factors of wind speed,mainly from the gas compressibility,the size of total pressure hole,location of static vent and pressure loss.Experiment s 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,in addition to the introduction of compressibility and pressure loss c...
出处
《实验室研究与探索》
CAS
北大核心
2010年第3期35-37,共3页
Research and Exploration In Laboratory
关键词
压缩性
压力损失
全压孔
静压孔
compressibility
pressure loss
total pressure hole
static vent
