摘要
各向异性的复杂流动在工程中广泛存在,且在中低雷诺数下还会存在转捩现象。处理各向异性复杂流动需采用基于雷诺应力各向异性的湍流模型,然而这些模型均是基于完全湍流假设而建立,不具备预测转捩的能力。近年来新发展的几种各向异性框架下的转捩模型又具有鲁棒性差及使用不便等缺点。为此,本文将γ转捩模型与ASST(Anisotropic Shear Stress Transport,ASST)湍流模型相结合,提出了ASST-γ转捩模型,以有效应对复杂流场中的转捩现象。为综合评估ASST-γ对转捩的预测能力,本文针对旁路转捩、自然转捩及分离诱导转捩三种主要转捩类型,分别选取经典的转捩算例进行了数值计算。结果表明:ASST-γ模型对三类转捩的数值计算结果均与试验结果吻合度较高,尤其在分离诱导转捩中的预测精度优于传统SST-γ模型;ASST-γ模型具备预测三类转捩的能力,有望解决复杂流场中的转捩问题。
Anisotropic complex flows are prevalent in various engineering applications,with transition phenomena occurring at low to moderate Reynolds numbers.Turbulence models based on Reynolds stress anisotropy are employed to handle these anisotropic complex flows.However,such models are based on fully developed turbulence assumption and lack the capability to predict transition phenomena.In recent times,these models are modified with transition models,which still exhibit poor robustness and practical inconvenience.To address this,this paper combinesγtransition model with the SST turbulence model,forming the ASST-γtransition model to effectively deal with the transition phenomena in complex flow fields.To comprehensively evaluate the predictive ability of the ASST-γmodel for transition,classical transition cases are numerically calculated for three main types of transition:bypass transition,natural transition,and separation-induced transition.The results indicate that the numerical calculations of the ASST-γmodel for the three types of transition are in good agreement with experimental results.In particular,it demonstrates better predictive accuracy for the type of separation-induced transition compared to the SST-γmodel.ASST-γmodel is capable of predicting these three types of transitions,offering a promising solution to transition issues in complex flow fields.
作者
李宁
韩盼盼
马乔
邱小平
尤云祥
吴凯健
LI Ning;HAN Pan-pan;MA Qiao;QIU Xiao-ping;YOU Yun-xiang;WU Kai-jian(State Key Laboratory of Ocean Engineering,Shanghai Jiao Tong University,Shanghai 200240,China;Yazhou Bay Institute of Deepsea Technology,Shanghai Jiao Tong University,Sanya 572000,China;Shanghai Junyu Information Technology Limited,Shanghai 201800,China)
出处
《船舶力学》
北大核心
2026年第1期61-68,共8页
Journal of Ship Mechanics
关键词
雷诺应力各向异性
湍流模型
转捩模型
Reynolds stress anisotropy
turbulence model
transition model
