试验风场的阻塞效应优化验证  

Optimization and Improvement of Wind Tunnel Field Test

作　　者：李帆 王志超 晏天 李庆超 LI Fan;WANG Zhichao;YAN Tian;LI Qingchao(South China Sea Standard and Metrology Centre,Guangzhou 510300)

机构地区：[1]国家海洋局南海标准计量中心,广州510300

出　　处：《气象科技》2021年第3期336-341,共6页Meteorological Science and Technology

摘　　要：为确定新型夹具固定点的位置,保证阻塞比降低到最小同时风杯组处于最优均匀性的范围内,在试验测试出试验风场最优均匀性区域的基础上,运用CAD建立三杯测风仪三维模型,计算三杯测风仪旋转过程中的最大迎风面积,最后进行阻塞效应测试加以验证。结果表明:基于CAD计算迎风面积修正了传统估算约5.8%的误差;优化后的试验风场阻塞比为0.04,降低了42%;试验风场的指示风速与自由风场的指示风速一致性良好。In order to determine the position of the fixed point of the new jig fastening piece and ensure that the blockage ratio is reduced to the minimum and the wind cup group is also in the optimal uniform field,on the basis of testing the optimal uniformity region of the test wind field,the three-dimensional model of the three-cup anemometer is established by using CAD,and the maximum frontal area in the rotation process of the three-cup anemometer was calculated.Finally,the blockage effect test experiment is carried out to verify it.The results show that the error of the traditional estimation is corrected by calculating the frontal area based on CAD,and the blockage ratio of the optimized test wind field is 0.04,which is reduced by 42%,and the indicated wind speed of the test wind field and the indicated wind speed of the free wind field are almost the same.

关 键 词：三杯测风仪 迎风面积 阻塞比 新型夹具设计 阻塞效应测试 

分 类 号：P414.7[天文地球—大气科学及气象学]