Research On The Two-phase Plume Flow Field's Characteristics Of Hypersonic Vehicles

When the hypersonic vehicle is flying in the near space with the rarefied air, the rocket plume will come into being gas-particle two-phase flow, which tend to influence the aerodynamic load distribution and radiative properties due to the particles, so the prediction of the rarefied gas-particle two-phase flow is in demand. The present research work has focused on the two-phase flow in which the gas phase is continuous, and the study on the gas-particle two-phase flow in which the gas phase is non-continuous is developing. This article will research on the rarefied two-phase flow of the hypersonic vehicle.Firstly, the interfere properties of jet flow to the coming flow field is investigated in this paper. Using Gambit software to create grid and adopting DSMC arithmetic, numerical simulate the interfere properties of jet flow to the coming flow field. Through numerical simulating of jet flow field of the typical shape and the complex shape, gained the interactional correlation conclusion of jet flow and the coming flow on the rarefied condition.Secondly, the flow field structure of the rarefied gas-particle two-phase flow is investigated. Based on studying the jet flow field, the DSMC arithmetic of the rarefied gas-particle two-phase flow will research on the next step. The ineractional,collision,consolidation and separation,phase change model of the rarefied gas-particle two-phase flow is researched mostly in this article, and the correlation procedure is compiled for numerical simulating, and the correlation conclusion is gained.Lastly, the particle radiation model of the rarefied two-phase flow is researched. Based on studying of the rarefied gas-particle two-phase flow, using the gas-particle two-phase flow field parameter as the original parameter of the radiational field, reaearched the particle radiation model of the rarefied gas-particle two-phase flow and compiled the DSMC procedure. Simulated the high altitude rarefied two-phase flow just consideration of particle, and analyzed the simulated result.