High-Speed Rarefied Round Jet and Jet Impingement Flows

摘要

This paper presents a gas kinetic study and exact solutions for a few of the problems related to a high-speed collisionless round jet: expanding into vacuum and impinging at a normally set, diffuse, or specular reflective circular plate of finite radius. Several fundamental geometry-velocity relations are used in this study and they play crucial roles. These complete results include flowfield properties and impingement properties at the plate surface. The final results include complex but accurate integrations involving geometry and specific speed ratio factors. Several numerical simulations with the direct simulation Monte Carlo method validate these analytical exact results.