空气动力学学报2013，Vol.31Issue(3)：350-356,370,8.
龙卷风风场特性的CFD数值模拟
CFD numerical simulation of tornado wind field characteristics
摘要
Abstract
Based on computational fluid dynamics (CFD,a numerical model of tornado generator was established and the characteristics of tornado wind field with a single vortex structure were studied.Radial and altitudinal distributions of the tangential velocity were presented,and the comparison of the radial distribution of tangential velocity with the theoretical formulas of Rankine vortex model and parameterized cyclone model was conducted,so as to verify the rationality of the numerical simulation results of tornado wind field.Influences on characteristics of tornado wind field were further studied by changing the inlet angle and velocity magnitude.The parameters of each numerical calculation model were given,which include core radius,maximum tangential velocity and swirl ratio near surface.Therefore,the tornado-like wind field with different intensities and scales was obtained.The present method provides a new approach to simulate tornadoes and can be used for study on tornado-resistant building designs.关键词
龙卷风/数值模拟/计算流体动力学/涡流比Key words
tornado/ numerical simulation/ CFD/ swirl ratio分类
数理科学引用本文复制引用
徐枫,肖仪清,李波,欧进萍..龙卷风风场特性的CFD数值模拟[J].空气动力学学报,2013,31(3):350-356,370,8.基金项目
国家自然科学基金(51008103) （51008103）
国家自然科学基金重大研究计划重点项目(90815030,90715031) （90815030,90715031）
