工程科学学报2016，Vol.38Issue(4)：568-574,7.DOI:10.13374/j.issn2095-9389.2016.04.017
高温长时间风洞喷管冷却结构CFD研究
CFD study on nozzle cooling structure for a wind tunnel of high temperature and long operation time
摘要
Abstract
A wind tunnel of high temperature and long operation time requires the use of cooling techniques, so we need design cooling channels on the nozzle. In this paper, rectangular cooling channels of high cooling efficiency were used to study the factors af-fecting nozzle cooling. First of all, a three-dimensional model of nozzle cooling structure was established. Secondly, the type of heat transfer of the nozzle was detailedly analyzed and at the same time radiation heat transfer was taken into account. Then based on the principle of simplicity and accuracy, a series of assumptions were made for the calculation model. Finally CFD techniques were used to carry out the numerical simulation. By analyzing the results of study, we obtained the rules how the aspect ratio of cooling channels in-fluenced nozzle cooling, the difference whether or not considering radiation heat transfer, and the impact of gas flow total temperature on nozzle cooling.关键词
风洞/喷管/冷却/计算流体动力学/高宽比/数值模拟Key words
wind tunnels/nozzles/cooling/computational fluid dynamics/aspect ratio/numerical simulation分类
航空航天引用本文复制引用
何宁,杨海波,孙冬柏..高温长时间风洞喷管冷却结构CFD研究[J].工程科学学报,2016,38(4):568-574,7.基金项目
国家重大科学仪器设备开发专项(2011YQ14014505) （2011YQ14014505）
