结冰风洞变截面拐角数值计算与实验研究  

Numerical Computation and Experiment Study on Variable Cross-section Corner in Icing Wind Tunnel

作　　者：刘森云[1] 朱春玲[1] 刘宇[1] 赵伟伟[1] 

机构地区：[1]南京航空航天大学航空宇航学院,南京210016

出　　处：《科学技术与工程》2016年第27期83-87,共5页Science Technology and Engineering

基　　金：国家自然科学基金(11372335);(11402114);国家973计划(2015CB755800)资助

摘　　要：为了降低变截面拐角流动损失,提高拐角出口速度均匀性,采用数值计算与实验相结合的方式研究了某型结冰风洞变截面拐角流动情况。研究结果表明:在未安装导流片的情况下变截面拐角流动会出现旋涡,造成能量损失,并会导致拐角下游速度均匀性较差;圆弧直线型导流片能够改善变截面拐角流动,降低整个流道压力损失;预偏角的选取对拐角流动具有较大影响,当预偏角为0°和2.5°时拐角段损失系数较小,随着预偏角增大为5°、7.5°、10°拐角段损失不断增加。In order to reduce the variable cross-section corner flow loss and improve the velocity uniformity of the corner exit,a study was conducted on the icing wind tunnel variable cross-section by computational flow dynamics（CFD） and experiment.The result show that there are vortexes at the corner without turning vanes,and it will cause enevgy losses and poor uniformity downstream.It will improve the corner flow and reduce the flow pressure loss by installing arc-linear turning vanes.The advance angle has great influence on the corner flow,and the loss coefficient is small at the advance angle of 0° and 2.5°.It will increase of the corner losses along with the advance angle increased to 5°,7.5°and 10°.

关 键 词：变截面拐角 数值计算 实验研究 导流片 预偏角 

分 类 号：V211.74[航空宇航科学与技术—航空宇航推进理论与工程]