沟槽面湍流减阻数值评估方法

doi:10.7527/S1000-6893.2016.0263

流体力学与飞行力学

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沟槽面湍流减阻数值评估方法

周健¹, 欧平¹, 刘沛清², 郭昊²

1. 中国航天空气动力技术研究院, 北京 100074;
2. 北京航空航天大学航空科学与工程学院, 北京 100083

收稿日期:2016-03-25 修回日期:2016-09-26 出版日期:2017-04-15 发布日期:2016-09-28
通讯作者: 欧平 E-mail:caaaop@163.com

Numerical evaluation method of turbulence drag reduction with riblets

ZHOU Jian¹, OU Ping¹, LIU Peiqing², GUO Hao²

1. China Academy of Aerospace Aerodynamics, Beijing 100074, China;
2. School of Aeronautic Science and Engineering, Beihang University, Beijing 100083, China

Received:2016-03-25 Revised:2016-09-26 Online:2017-04-15 Published:2016-09-28

摘要/Abstract

摘要：

为解决雷诺平均Navier-Stokes（RANS）方法模拟沟槽面减阻的实际应用问题，受Wilcox对粗糙度模化方法的启发，通过深入分析k-ω剪切应力输运（SST）湍流模型近壁区ω值的作用效果，发现在黏性底层内增加壁面ω值可使对应近壁区的湍动能、湍流黏度、雷诺应力均减小，这种对近壁区流动特性的作用效果与真实沟槽面一致。以经典的对称V型沟槽面（高度=间距）减阻实验数据为基础，通过引入减阻效果影响因子——压力梯度与偏航角，建立复杂流动条件下沟槽面几何尺寸到壁面ω值的模化函数方程，将数值模拟结果与实验结果对比，验证了模化沟槽面可以达到与真实沟槽面相同的减阻效果，并依此给出沟槽面减阻在工程实践中的应用方法，以C919翼身组合体巡航构型为例，完成其沟槽面减阻的总体设计与评估。

关键词: 沟槽面, 湍流减阻, k-ω剪切应力输运, 模化函数, 数值模拟

Abstract:

In order to apply numerical simulation method based on Reynolds-averaged Navier-Stokes (RANS) equations to drag reduction with riblets, inspired by the roughness model-Wilcox and after a deeper study on the effect of the value of ω near wall in k-ω shear stress transport (SST) turbulence model, it turns out that an increasing of wall ω in viscous sublayer leads to a decreasing of turbulent kinetic energy, turbulent viscosity and Reynolds shear stress, which shows the same change as realistic riblets. Based on the classical experimental data of riblets with symmetric V grooves (height=width), by introducing the effect factors pressure gradients and yaw angle, a modeling function between riblets geometry size and the value of wall ω is established in complex flow conditions. Comparing with the experimental data confirms that the modeling riblets can predict the drag reduction as realistic riblets. Besides, a detailed application method of modeling riblets is proposed. At last, an overall design and evaluation of the drag reduction by riblets is given in the case of the C919 wing-body combination.

Key words: riblet, turbulence drag reduction, k-ω shear stress transport, modeling function, numerical simulation

中图分类号:

周健, 欧平, 刘沛清, 郭昊. 沟槽面湍流减阻数值评估方法[J]. 航空学报, 2017, 38(4): 120263-120263.

ZHOU Jian, OU Ping, LIU Peiqing, GUO Hao. Numerical evaluation method of turbulence drag reduction with riblets[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2017, 38(4): 120263-120263.

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E-mail：hkxb@buaa.edu.cn

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主管单位：中国科学技术协会主办单位：中国航空学会北京航空航天大学

沟槽面湍流减阻数值评估方法

Numerical evaluation method of turbulence drag reduction with riblets

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