摘要
使用更加先进的网格划分技术和数值模拟方法,可以大大提高潜艇热尾流数值仿真的精度。分别采用基于重叠网格技术和基于来流法的数值模拟方法,研究了潜艇热尾流的水面温度分布和形状特征。通过实验结果对比了两种仿真方法的精度.通过对比两种仿真方法中热尾流在水中的温度衰减规律,分析了来流法误差原因。结果表明:基于重叠网格技术的数值模拟方法具有较高精度,能够体现水面热尾流的瞬态运动特征和涡特征,仿真得到的水面热尾流的形状特征、最大温差数值和出现时间都与实验结果较为吻合;基于来流法的数值模拟方法精度较差,不能体现水面热尾流的瞬态运动特征和涡特征。持续的来流增大了热尾流与环境水体之间的能量交换速度。
The accuracy of submarine thermal wake numerical simulation can be greatly improved by using more advanced meshing technology and numerical simulation method.The numerical simulation methods based on overset grid technology and inflow method are adopted respectively to study the temperature distribution and shape characteristics of submarine thermal wake on water surface.The accuracy of the two simulation methods is compared by the experimental results.By comparing the temperature attenuation law of the thermal wake in water between the two simulation methods,the error reason of the inflow method is analyzed.The results show that:The numerical simulation method based on overset grid technology has high accuracy and can reflect the transient motion and eddy characteristics of the thermal wake on water surface.The shape characteristics,maximum temperature difference value and occurrence time obtained by simulation are in good agreement with the experimental results.The numerical simulation method based on inflow method is inferior in accuracy and can not reflect the transient motion and eddy characteristics.The continuous inflow intensifies the energy exchange between the thermal wake and surrounding water.
作者
王平
杜永成
柳文林
杨立
WANG Ping;DU Yong-Cheng;LIU Wen-Lin;YANG Li(College of Basic Sciences for Aviation,Naval Aviation University,Yantai 264001,China;Academy of Power Engineering,Naval University of Engineering,Wuhan 430033,China)
出处
《工程热物理学报》
EI
CAS
CSCD
北大核心
2020年第10期2589-2595,共7页
Journal of Engineering Thermophysics
基金
“十三·五”预研项目(No.9950204090301)
水下测控技术重点实验室延伸性发展基金项目(No.YS0C261502)。
关键词
热尾流
重叠网格
来流法
温度分布
温度衰减
thermal wake
overset grid
inflow method
temperature distribution
temperature attenuation
