微吹减阻技术影响因素的数值模拟  

Numerical simulation on influencing parameter of micro-blowing technique

作　　者：李舰[1] 李椿萱[1] 贾力平[1] 甄华萍[1] 

机构地区：[1]北京航空航天大学航空科学与工程学院,北京100191

出　　处：《北京航空航天大学学报》2010年第2期218-222,共5页Journal of Beijing University of Aeronautics and Astronautics

摘　　要：以NASA格伦中心的PN3和PN23型微孔壁板为原形建立"1排微孔"、"4排微孔"、"8排微孔"和"16排微孔"4种计算模型,针对不同的几何、物理参数进行了微吹技术MBT(Micro-Blowing Technique)降低平板摩擦阻力的数值模拟参数研究.结果显示:微量吹气使主流边界层近壁面流动减速,从而改变了壁面局部摩擦力的分布;不同几何、物理参数对MBT技术减阻能力的影响满足一定的规律.参数研究的结果可为该技术的减阻应用提供一定的指导.Taking micro-porous plates PN3 and PN23 of NASA Glenn Research Center as prototypes, four flat plates made of micro-channels aligning in single-, four-, eight- and sixteen-row patterns were chosen as the numerical models, and parametrical studies on skin friction reduction utilizing micro-blowing through micro-porous walls were performed for different geometric and physical parameters. Numerical results demonstrate that the velocity near the porous wall is decelerated by the micro-blowing, and thus affects the local skin friction distribution. The parametric studies also reveal the influences on the drag reduction capacities by various relevant parameters, which will provide some guidance on the application of micro-blowing technique MBT） for drag deduction.

关 键 词：微吹技术 边界层 表面摩擦力 减阻 数值模拟 

分 类 号：O357.52[理学—流体力学]