直流式风洞测量不确定度评定研究  

Research on measurement uncertainty evaluation of direct flow wind tunnel

作　　者：王旭 白赢策[2] 张昊喆 金元尚 赵雪明 Wang Xu;Bai Yingceng;Zhang Haozhe;Jin Yuanshang;Zhao Xueming(Jilin Meteorological Observation Support Centre,Changchun 130062,China;Meteorological Observation Centre of CMA,Beijing 100081,China)

机构地区：[1]吉林省气象探测保障中心,长春130062 [2]中国气象局气象探测中心,北京100081

出　　处：《国外电子测量技术》2024年第9期141-148,共8页Foreign Electronic Measurement Technology

基　　金：国家计量技术法规项目(市监计量发[2021]50号)资助。

摘　　要：为科学评定分析直流式风洞运行数据准确性,以WZ860070-E型直流式风洞为研究对象,参照QX/T84-2007《气象低速风洞性能测试规范》对风洞的流场均匀性和流场稳定性进行测试实验。通过GUM方法对2、40、60 m/s测试点的流速均匀性、流速稳定性的测试结果开展测量结果不确定度评定。结果表明,测量重复性引入的分量为主要影响量;扩展不确定度评定结果基本满足JJF1094-2002《测量仪器特性评定》的合格判据,可信程度较高;受标准测试设备性能及外界因素影响,2 m/s风速流场均匀性和流场稳定性的测量结果扩展不确定度结果同高风速的相比偏大。In order to scientifically analyze the quality of operation data of the direct current wind tunnel,taking the WZ860070-E type direct current wind tunnel as the research object,the test experiments on the flow field uniformity and stability of the wind tunnel were carried out with reference to QX/T84-2007"Performance Test Specifications for Meteorological Low-Speed Wind Tunnels".The measurement result uncertainty evaluation was carried out for the test results of flow velocity uniformity and stability at the test points of 2,40,and 60 m/s through the GUM method.The experiment shows that the component introduced by measurement repeatability is the main influencing quantity,the evaluation result of expanded uncertainty basically meets the qualified criterion of JJF 1094-2002"Evaluation of Measuring Instrument Characteristics",and the credibility is relatively high,affected by the performance of the test equipment and external factors,the expanded uncertainty results of the measurement results of the uniformity and stability of the 2m/s wind speed flow field are larger compared with those of the high wind speed.

关 键 词：直流式风洞 流速均匀性 流速稳定性 不确定度 

分 类 号：TH765[机械工程—仪器科学与技术]