驻点壁面催化速率常数确定的研究

The determination of catalytic rate constant of surface materials of testing model in the shock tube

以平衡流动作为热环境估算的依据，提出了用数值求解非平衡NavierStokes方程和实验测量热流值确定模型表面材料催化速率常数的方法。用5组分17个化学反应DunnKang空气化学模型和轴对称热化学非平衡NavierStokes方程，对激波管中球头和平头圆柱模型绕流流场进行了数值模拟，给出了驻点热流随催化速率常数变化的分布，并根据激波管实验测量的热流值确定了表面材料Pt、SiO2、Ni和某种飞船材料的催化速率常数，建立了数值分析高焓流动边界层催化特性的软件。

It is introduced that the catalytic rate constant of surface materials of testing model is determined by solving nonequilibrium NavierStokes equations and measuring heat transfe r rate of the stagnation point of testing model. The flowfield around a hemisp here and a flatnosed cylinder in the shock tube is simulated numerically by using nonequilibrium NavierStokes equations with a n air chemical model of 5 species 17 reactions, and the catalytic rate constant of surface materials such as Pt, SiO2, Ni and a flight vehicle materials is de termined by using the heat transfer rate of testing in the shock tube and the di stribution of heat transfer rate along with the catalytic rate constants.