摘要
介绍了湍流抑制方法及其原理,并使用该方法和目前常用的γ-Reθ过渡流模型、湍流模型对较低雷诺数下平板、翼型结构和螺旋桨的边界层流动进行了模拟,并对粘性力进行了预报.通过与实验值进行比较,讨论了3种方法的优缺点:在有过渡流的情况下,湍流模型预报的粘性力误差较大;γ-Reθ模型能够预报过渡流,但是转捩点的位置由很多因素决定,从而影响粘性力的预报准确性,并且需要求解2个额外的输运方程,计算效率较低;湍流抑制方法虽然没有预报过渡流的能力,但是在预先知道转捩点位置的情况下(模型实验或者公式估算),可以简单、高效、准确地模拟过渡现象和预报粘性力,并且没有湍流模型的限制,可以针对不同的流场选择不同的湍流模型结合使用.
The principle of turbulence suppression method (TSM) was introduced. Boundary layer transition flow over a flat plate and an airfoil was predicted by TSM, turbulence model and the γ- Re θ transition model, and the viscous force was predicted. The advantages and disadvantages of the three methods were discussed by comparing with the experimental data. Predictions of viscous force by the turbulence model have obvious error when there is transition flow. The γ- Re θ model can predict the transition flow, but the transition point is largely influenced by many factors, which affect the accuracy of viscous force prediction. Moreover, two more transport equations need to be solved, which makes calculation efficiency low. The TSM cannot predict the transition flow, but in the case of knowing the transition location in advance, the transition flow can be simulated simply, efficiently and accurately, and the viscous force can be predicted. As the TSM has no limitation for turbulence model, the TSM with different turbulence models can be applied to different flow fields.
作者
姚慧岚
张怀新
YAO Huilan;ZHANG Huaixin(State Key Laboratory of Ocean Engineering, Collaborative Innovation Center for Advance Ship and Deep-SeaExploration, Shanghai Jiao Tong University, Shanghai 200240,China;College of Engineering, Ocean University of China, Qingdao 266000,China)
出处
《江苏科技大学学报（自然科学版）》
CAS
2019年第2期14-19,共6页
Journal of Jiangsu University of Science and Technology:Natural Science Edition
基金
国家自然科学基金资助项目(51479116
11272216)
关键词
过渡流
粘性力
湍流模型
过渡流模型
湍流抑制方法
transition flow
viscous force
turbulence model
transition model
turbulence suppression model
