脊状表面流场数值计算方法研究  

Research at the computational methods of flow fields over riblets surface

作　　者：胡海豹[1] 宋保维[1] 刘占一[1] 黄桥高[1] 潘光[1] 

机构地区：[1]西北工业大学航海学院,陕西西安710072

出　　处：《空气动力学学报》2011年第3期348-354,共7页Acta Aerodynamica Sinica

基　　金：国家自然科学基金(50835009);陕西省自然科学基础研究计划项目(2010JQ1009);西北工业大学"翱翔之星"计划;"新人新方向"等校内项目

摘　　要：根据现有湍流数值模拟方法的特点和脊状表面减阻理论研究的实际需要,研究了基于雷诺平均N-S方程的脊状表面流场数值计算方法,并基于纵向及横向脊状表面的形状特点,提出了不同脊状表面计算域选取及网格剖分的方法。一系列典型横向及纵向脊状表面流场数值计算结果表明,所采用的这套脊状表面数值计算方法不仅能够精确获得脊状表面的减阻特性,还可以获得脊状结构内部及附近流速、压强、涡量等细微流场结构的分布规律。Through analysis the characteristics of turbulence simulation methods at present and the actual requirements in drag reduction investigations over riblets surface,the simulation method of riblets surface flow field based on Reynolds-averaged N-S equation has been established.In allusion to the different characteristics of the longitudinal and transverse riblets surfaces,different computational regions and computational meshs were selected reasonably.A series of simulation results gain in this paper prove that not only the drag reduction values but also the distributing characteristics of flow velocity,pressure,and vortex,etc over riblets surface could be gain accurately using the computational methods.

关 键 词：脊状表面 减阻 湍流 涡量 

分 类 号：O357[理学—流体力学]