铁道科学与工程学报Issue(5)：975-981,7.
基于测压方法的 CRH2列车气动特性风洞试验研究
Wind tunnel test on aerodynamic characteristic of CRH2 train based on pressure measure ment methodology
摘要
Abstract
Due to the shortcomings in the aerodynamic forces measurements with a dynamometer for high speed train,a new methodology based on pressure measurements has been developed in order to improve the testing ac-curacy of fluctuating aerodynamic forces.The unsteady aerodynamic characteristics of CRH2 train under uniform cross wind were analyzed.The test results indicate that when the pressure taps distribution is appropriate and dense enough,pressure complementary calculations can also give the density of steady aerodynamic forces as ac-curately as the force test.In addition,the aerodynamic forces on the train have strong unsteady characteristics e-ven under uniform cross wind,and extreme aerodynamic forces are about 1.7 times of their mean values.The maximum spectral value in the low frequency range between 0 and 10 Hz occurs at 90°yaw angle,and the mini-mum value is found at 0°yaw angle.While the spectral value distributions in the high frequency greater than 10 Hz are just contrary.When the yaw angle is less than 60°,the proportion of low frequency energy in total is less than 50%.关键词
高速列车/气动特性/测压/测力/风洞试验Key words
high -speed train/aerodynamic characteristic/pressure measurement/force measurement/wind tunnel test分类
交通工程引用本文复制引用
邹云峰,何旭辉,史康,周佳,谭立新..基于测压方法的 CRH2列车气动特性风洞试验研究[J].铁道科学与工程学报,2015,(5):975-981,7.基金项目
国家自然科学基金资助项目（51322808，51178471，51508580）；教育部新世纪优秀人才支持计划（NCET －12－0550）；中国博士后科学基金资助项目（2014M562133）；长江学者和创新团队发展计划资助项目（IRT1296）；中南大学“创新驱动计划”资助项目 （）
