计量学报2024，Vol.45Issue(6)：864-872,9.DOI:10.3969/j.issn.1000-1158.2024.06.12
S型皮托管对向和非对向测量方法准确度实验研究
Experimental Study on Measurement Accuracy of Nulling and Non-nulling S-type Pitot Tubes
摘要
Abstract
The accuracy of the nulling and non-nulling of the S-type pitot tube is quite different under different working conditions.The influence of wind velocity,velocity angle of attack and structural parameters on the accuracy of nulling and non-nulling of the S-type pitot tube is studied through the wind tunnel.The results show that when the wind velocity changes from 5 to 30 m/s,the maximum difference in the measurement accuracy of pitot tube is more than 10％in nulling and non-nulling at different velocity angles of attack.The pressure change of the static pressure hole in nulling and non-nulling is the main reason for the measurement error of the pitot tube at large velocity angles of attack.The pitot tube with smaller outer diameter,larger distance between total and static pressure hole,bending angle of measuring end between 15° and 30°,and smaller inner diameter of pressure tapping has higher measurement accuracy in both nulling and non-nulling.When the pitch angle is positive,the measurement accuracy of nulling is better than that of non-nulling.When the pitch angle and yaw angle are both 45°,the difference of measurement accuracy reaches the maximum,which is greater than 70％.关键词
流量测量/S型皮托管/烟道流量/对向测量/非对向测量/测量准确度Key words
flow measurement/S-type pitot tube/stack flowrate/nulling/non-nulling/measurement accuracy分类
通用工业技术引用本文复制引用
张乐垚,张亮,郭素娜,郭虎林,鲁贵祥,孔令彩..S型皮托管对向和非对向测量方法准确度实验研究[J].计量学报,2024,45(6):864-872,9.基金项目
中国计量科学研究院基本科研业务费重点领域(AKYZD2207) （AKYZD2207）
