方形均速管流量系数影响因素试验研究  

Experimental Study on Factors Affecting Flow Coefficient for Square Averaging Pitot Tube

作　　者：夏南琪 张吉礼[1] 马志先[1] 赵天怡[1] 

机构地区：[1]大连理工大学建筑能源研究所

出　　处：《建筑热能通风空调》2014年第1期10-13,共4页Building Energy & Environment

基　　金：国家"十二五"科技支撑计划(2011BAJ03B12-3);中央高校基本科研业务费重大类研究型培育项目(DUT11ZD105)

摘　　要：通过伯努利方程推导出方形均速管的流量系数另一表达式。根据正交试验理论设计了方形均速管样管,以空气为介质,对样管进行了流量系数主效应因素试验,试验结果表明检测杆横截面的当量直径和静压孔中心与检测杆横截面中心的角度为影响方形均速管流量系数的主效应因素。试验的有效工况保证了相对误差控制在5%以内。Another expression of flow coefficient for square averaging pitot tube was derived from Bernoulli equation. Test square tubes were designed by means of orthogonal theory and then experiment of main factor on flow coefficient was conducted with air as medium. Results show that test bar＇s cross section equivalent diameter and the angle between the center of static vent and the center of test bar＇ s cross section are the main affecting factors. Effective metrical conditions were obtained based on error analysis, which insured the relative error under 5%.

关 键 词：方形均速管 流量系数 影响因素 试验 

分 类 号：TH814[机械工程—仪器科学与技术]