含灰气体激波管侧壁层流边界层流动特征

水文采用数值方法求解含灰气体激波管中侧壁层流边界层,揭示了这类流动中呈现的三个特征不同的区域.为了研究两相边界层的发展,本文构造了一个包括六点和四点格式的隐式有限差分程序,引进了适当描述气固两相间相互作用的非斯托克斯关系,并分别给出了气体和粒子的速度与温度剖面。此外,文中还讨论了激波管压力比、粒子载荷比和粒子尺寸对侧壁边界层流动特性的影响。

THE CHARACTERISTICS OF LAMINAR SIDEWALL BOUNDARY-LAYER FLOWS IN A DUSTY-GAS SHOCK TUBE

Laminar sidewall boundary-flayer flows in a dusty-gas shock tube are solved numerically by a finite-difference procedure. The results indicate that there exist three different characteristic flow regions. The details are given of an implicit four-and six-point scheme to study the development of the boundary layer. An appropriate non-Stokes relation to describe the interaction between the two phases is employed. The resulting velocity and temperature profiles across the boundary layer are given for gas and particle phase, respectively. The effects of the diaphragm pressure ratio, the mass loading ratio of particles and the particle size upon the flow properfie.; are discussed.