| 高温空气传输特性对边界层稳定性及转捩预测的影响 |
| |
| 引用本文： | 万兵兵,韩宇峰,樊宇,罗纪生.高温空气传输特性对边界层稳定性及转捩预测的影响[J].航空动力学报,2017,32(1):188-195. |
| |
| 作者姓名： | 万兵兵 韩宇峰 樊宇 罗纪生 |
| |
| 作者单位： | 天津大学 机械工程学院 力学系，天津 300072 |
| |
| 基金项目： | 国家自然科学基金（11332007）;国家自然科学基金青年科学基金资助项目（11202147）;高等学校博士学科点专项科研基金（新教师类）资助课题（20120032120007） |
| |
| 摘 要： | 为了研究黏度和导热系数对边界层内基本流和流动稳定性的影响，首先通过分析比较Sutherland公式和目前常用的Gupta等人的拟合关系式，建立了高温气体下黏度和导热系数的计算模型，并分别将Sutherland公式和新建立的计算模型应用于7组元化学平衡流的平板模型，在马赫数为10，16和20，飞行高度为30-5km等条件下分别对黏度和导热系数的模型进行比较.计算结果表明:在高温范围内，黏度和导热系数均影响着边界层的基本流、流动稳定性及转捩预测，且两者影响的趋势相反，黏度的增加、导热系数的减小都能使扰动的增长率变大，增长区变宽，转捩位置提前.
|
| 关 键 词： | 航空发动机 燃烧室黏度 导热系数 化学平衡流 流动稳定性 转捩预测 |
| 收稿时间： | 2015/5/6 0:00:00 |
Effect of transport properties of high-temperature air on boundary layer stability and transition prediction |
| |
| WAN Bing-bing,HAN Yu-feng,FAN Yu,LUO Ji-sheng.Effect of transport properties of high-temperature air on boundary layer stability and transition prediction[J].Journal of Aerospace Power,2017,32(1):188-195. |
| |
| Authors: | WAN Bing-bing HAN Yu-feng FAN Yu LUO Ji-sheng |
| |
| Abstract: | In order to study the effect of viscosity and thermal conductivity coefficient on the basic flow and flow stability in the boundary layer, the calculation model of the viscosity and thermal conductivity coefficient of high temperature gases was established by comparing Sutherland formula and Gupta fitting relation. Then Sutherland formula and the established model were applied to the 7 species air model for chemical equilibrium flow respectively, and these models were compared in flat plate boundary layer of Mach number 10, 16 and 20 at the flight height of 30-5km. The calculation result shows that, within the high temperature range, the viscosity and thermal conductivity coefficient both affect basic flow, flow stability and transition prediction. The increase of viscosity can raise the disturbance growth rate, broaden the growth zone and advance the transition location, whereas the increase of thermal conductivity coefficient leads to opposite results. |
| |
| Keywords: | aero engine combustorviscosity thermal conductivity coefficient chemical equilibrium flow flow stability transition prediction |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
| 点击此处可从《航空动力学报》浏览原始摘要信息 |
|
点击此处可从《航空动力学报》下载全文 |
