小孔间距布局对厢体气膜减阻效果的影响  

Influence of Hole Spacing Layout on Air Film Drag Reduction Effect of Van Body Surface

作　　者：谢小鹏[1] 刘淑平[1] 曹立峰[1] 卢小辉[1] XIE Xiaopeng;LIU Shuping;CAO Lifeng;LU Xiaohui(School of Mechanical and Automotive Engineering,South China University of Technology,Guangzhou Guangdong 510640,China)

机构地区：[1]华南理工大学机械与汽车工程学院

出　　处：《润滑与密封》2019年第9期1-6,24,共7页Lubrication Engineering

基　　金：广东省自然科学基金项目(2016A030313452);2017年华南理工大学研究生专业竞赛项目(2017SJ01),2017年华南理工大学校级教研教改项目(201729);华南理工大学第四批“探索性实验”教学项目(201703)

摘　　要：为研究小孔间距布局对厢体气膜减阻效果的影响,通过优化厢体模型结构设计一种被动式气膜发生器,在渗流小孔直径1 mm、小孔与厢体表面倾斜度90°不变的情况下,通过模拟风洞实验测试厢体表面有渗流和无渗流喷出时小孔纵向间距为1.1~3 mm和小孔横向间距为1.1~5 mm的厢体模型所受到的总阻力。结果表明:小孔纵向间距的变化对厢体表面气膜减阻效果的影响很小;随着小孔横向间距的增加,厢体表面气膜减阻效果先增大后减小,且在小孔横向间距1.1~3 mm范围内减阻效果最佳;在主流速度和渗流速度比值相等的情况下,气膜减阻效果随着主流速度和渗流速度的增大而减小。In order to study the influence of hole spacing layout on the air film drag reduction effect of van body surface,a passive air film generator was designed by optimizing van model.Under the condition that the diameter of seepage hole is 1 mm and the inclination between hole and chamber surface is 90°,the total resistance of the chamber model with longitudinal spaces of the small holes from 1.1 to 3 mm and transverse distance of the small holes from 1.1 to 5 mm was tested by simulated wind tunnel test with or without the seepage of the van surface.The results show that the longitudinal spaces of the small holes have little influence on the drag reduction effect.The drag reduction effect of the van body surface is increased first and then decreased with the increasing of the lateral spaces of the small holes,and the best drag reduction effect is obtained when the hole lateral space is from 1.1 to 3 mm.The drag reduction effect is decreased with the increasing of mainstream speed and seepage speed when the ratio of mainstream speed and seepage speed is equal.

关 键 词：模拟风洞 气膜发生器 减阻效果 纵向间距 横向间距 

分 类 号：TH117[机械工程—机械设计及理论]