修正Realizable k-ε模型在高压淹没水射流中的应用  

Correction of Realizable k-εModel for High Pressure Submerged Water Jets

作　　者：余健翔 刘剑[2] 王观石[1] 罗嗣海[1] 汪杰 YU Jian-xiang;LIU Jian;WANG Guan-shi;LUO Si-hai;WANG Jie(School of Civil and Surveying Engineering,Jiangxi University of Science of Technology,Ganzhou 341000,China;School of Resources and Environmental Engineering,Jiangxi University of Science of Technology,Ganzhou 341000,China;College of Civil and Architectural Engineering,Panzhihua University,Panzhihua 617000,China)

机构地区：[1]江西理工大学土木与测绘工程学院,赣州341000 [2]江西理工大学资源与环境工程学院,赣州341000 [3]攀枝花学院土木与建筑工程学院,攀枝花617000

出　　处：《科学技术与工程》2021年第12期5024-5030,共7页Science Technology and Engineering

基　　金：国家自然科学基金(51874147);国家重点研发计划(2019YFC0605001);江西理工大学校级优秀博士论文培育项目(3105500027)。

摘　　要：淹没水射流在工程中具有广泛的应用,空化是高压淹没水射流的基本特征。现有的空化模型仍不完善,对各种工况普适性较差,数值模拟仍存在较大误差。为了提高数值模拟对淹没水射流的预测能力,采用Realizable k-ε模型模拟淹没水射流,使用修正的模型常数并结合滞止压力实验验证,研究5~40 MPa射流压力下的修正模型常数。结果表明,对模型常数进行修正可有效地提高模型对0~70倍直径射程范围内淹没水射流轴心压力的预测能力,使误差降低至10%以内,可见使用修正常数的Realizable k-ε模型模拟高压淹没水射流是一种简便且准确的方法。Submerged water jet is widely used in engineering and the cavitation is the basic feature of submerged water jet.The cavitation model remains not perfect,its universality for all working conditions was poor,and the numerical simulation still has large error.To improve the prediction ability of numerical simulation for submerged water jet,the Realizable k-εmodel was used for the simulation.A modified model constant was used and verified in stagnation pressure experiment.The modified model constant under 5~40 MPa jet pressure was studied.The results show that the modification of the model constant could effectively improve the prediction ability of the model for the axial pressure of submerged water jet in the range of 0~70 times of diameter,and reduce the error to less than 10%.Therefore,it is a simple and accurate method to simulate high-pressure submerged water jet by using the Realizable k-εmodel with modified constants.

关 键 词：淹没水射流 数值模拟 修正模型 Realizable k-ε模型 

分 类 号：TP602.2[自动化与计算机技术—控制理论与控制工程]