国家数值风洞风雷软件分布式粗糙壁面边界层流动模拟  

Distributed rough surface boundary layer flow simulation using NNW-PHengLEI software

作　　者：杜一鸣 陈祖昌 邱福生[1] 麻彤 佟胜喜 DU Yiming;CHEN Zuchang;QIU Fusheng;MA Tong;TONG Shengxi(College of Aerospace Engineering,Shenyang Aerospace University,Shenyang 110136,China;Liaoning General Aviation Academy,Shenyang Aerospace University,Shenyang 110136,China)

机构地区：[1]沈阳航空航天大学航空宇航学院,沈阳110136 [2]沈阳航空航天大学辽宁通用航空研究院,沈阳110136

出　　处：《沈阳航空航天大学学报》2024年第4期11-24,共14页Journal of Shenyang Aerospace University

基　　金：国家自然科学基金(项目编号:12202284);江西省飞行器设计与气动仿真重点实验室开放基金(项目编号:EI202280263);沈阳航空航天大学引进人才科研启动基金(项目编号:22YB11)。

摘　　要：针对粗糙元均匀分布壁面,基于国家数值风洞风雷软件,在k-ωSST湍流模型和γ-Re_(θt)转捩模型中分别引入粗糙壁面边界条件修正及粗糙壁面转捩动量厚度雷诺数,同时增加了部分粗糙表面设置,实现了局部/全局粗糙壁面边界层流动模拟能力。算例研究表明,对于全湍状态翼型,粗糙壁面导致失速攻角减小4°,1×10^(-3)倍弦长量级的等效粗糙元高度使最大升力系数下降约36%。同时粗糙壁面会使边界层转捩提前,导致翼型的摩擦阻力增大。计算分析证明,Hellsten等提出的粗糙壁面比耗散率边界条件能够较准确地反映粗糙度造成的影响,气动力计算结果与实验值基本吻合,流场模拟结果符合粗糙壁面流动特征;同时能够保证与转捩模型及其粗糙壁面修正的稳定耦合计算,对于转捩位置及其随粗糙度和来流湍流度变化趋势的模拟结果符合实验结果,但转捩区长度还需通过更严谨的实验进行进一步验证和修正。Based on the NNW-PHengLEI software,for surfaces with uniformly distributed rough elements,rough surface boundary condition corrections and transition momentum thickness Reynolds numbers were introduced into the k-ωSST turbulence model and theγ-Re_(θt) transition model respectively.At the same time,some rough surface settings were added to achieve local/global rough surface boundary layer flow simulation capability.Test results show that when an airfoil is in a fully turbulent state,rough surfaces can reduce the stall angle of attack by 4°,and an equivalent roughness height of 1×10^(-3) of chord length can cause a decrease in maximum lift coefficient by approximately 36%.Additionally,rough surfaces can advance the boundary layer transition,leading to an increase in skin friction drag.The computational analysis proves that the rough surface boundary condition proposed by Hellsten et al.can reflect the roughness effect more accurately than the dissipation rate boundary condition.The computational aerodynamic forces are consistent with the experimental data,and the flow field simula‐tion results conform to the flow characteristics of rough surfaces.In addition,Hellsten’s model makes it possible to ensure stable coupling simulation with the transition model and its rough surface correlation function.The simulation results for the transition onset location and its trend with roughness level and freestream turbulent intensity are consistent with the experimental data.Still,the transition length needs further verification and correction through more rigorous experiments.

关 键 词：边界层流动 粗糙壁面 湍流模型 转捩模型 国家数值风洞风雷软件 

分 类 号：V211.3[航空宇航科学与技术—航空宇航推进理论与工程]