基于混合RANS-LES方法的三维U型弯管内部流场数值模拟  

Numerical simulation of internal flow in a three-dimensional U-bend duct using hybrid RANS-LES method

作　　者：郑家乐 韩盼盼 尤云祥[1,2] 冯爱春[1,2] 张瑞瑞[3] ZHENG Jiale;HAN Panpan;YOU Yunxiang;FENG Aichun;ZHANG Ruirui(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;School of Naval Architecture and Ocean Engineering,Jiangsu University of Science and Technology,Zhenjiang 212100,China)

机构地区：[1]上海交通大学海洋工程国家重点试验室,上海200240 [2]上海交通大学三亚崖州湾深海科技研究院,三亚572000 [3]江苏科技大学船舶与海洋工程学院,镇江212100

出　　处：《江苏科技大学学报(自然科学版)》2024年第6期37-43,共7页Journal of Jiangsu University of Science and Technology:Natural Science Edition

基　　金：江苏科技大学科研启动基金项目。

摘　　要：以三维U型弯管内部复杂的流动为对象,分别采用IDDES、SBES以及曲率修正后的SBES模型对弯管中的流动进行了数值模拟,对比分析了轴向速度、摩擦阻力系数和压力系数的试验和数值模拟结果.研究表明,SBES模型相对于IDDES模型有更好的模拟精度,且SBES模型的三类亚格子尺度模型中,WALE模型可以更为准确地模拟三维U型弯管内部流场特征.同时,曲率修正对SBES模型所得的轴向速度、摩擦阻力系数和压力系数数值模拟结果都有一定的改善效果.The complex internal flow in the three-dimensional U-bend duct is numerically investigated based on hybrid RANS-LES method. Three models are adopted, i.e. the IDDES model, the SBES model, and the SBES model employing curvature correction. The experimental and numerical results of axial velocity, frictional drag coefficient, and pressure coefficient are compared in detail, it is found that the SBES model yields more accurate results than the IDDES model, and WALE model characterizes the internal flow of the three-dimensional U-bend duct well compared with the other two sub-grid scale models. Moreover, the curvature correction employed by the SBES model improves the numerical results of axial velocity, fractional drag coefficient and pressure coefficient.

关 键 词：三维U型弯管 曲率流动 混合RANS-LES方法 IDDES模型 SBES模型 

分 类 号：O352[理学—流体力学]