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.
出处
《北京航空航天大学学报》
EI
CAS
CSCD
北大核心
2010年第2期218-222,共5页
Journal of Beijing University of Aeronautics and Astronautics
关键词
微吹技术
边界层
表面摩擦力
减阻
数值模拟
micro blowing technique
boundary layers
skin friction
drag reduction
numerical simulation
