陶瓷防热瓦间缝隙气动加热规律研究

摘要

Parametric analysis of aerodynamic heating in gaps among ceramic insulating tiles array was carried out by using CFD based on analyzing gap flow characteristic. Effects of Mach number, attack angle, gap width, tile edge radius, and steps among tiles on heating rate distribution in gaps were studied. Results showed that internal heat flux in gaps is U shape distribution, and decreases with increase of Mach number, but increases as increase of attack angle, gap width, tile edge radius, and steps.%在分析缝隙内部流动特征的基础上，利用CFD技术对瓦间缝隙气动加热的参数影响规律进行了研究，着重探讨了来流马赫数、攻角、缝隙宽度、倒角半径及瓦间台阶因素对缝隙内部热流分布的影响。研究结果表明，缝隙内部热流呈U形分布，缝隙内部热流随着马赫数的增大而减小，随着攻角、缝隙宽度、倒角半径、瓦间台阶的增大而增大。