Numerical Simulation of Rarefied Multi-Phase Plume Flows at High Altitudes
- Paper number
IAC-11,A2,2,13,x9769
- Author
Dr. Jie Li, National University of Defense Technology, China
- Coauthor
Dr. Yu-Zhong Shi, China
- Coauthor
Dr. Li Yan, College of Aerospace and Materials Engineering, National University of Defense Technology, China
- Coauthor
Dr. Jun Liu, China
- Year
2011
- Abstract
When the vehicle is flying in the high altitude with the rarefied air, there are microscale particles from solid propellant rocket plumes, which tend to dominate radiative properties within the plume, and play great role in the efficiency of the rockets and the reliability of the vehicle, so the prediction of the rarefied gas-particle two-phase flow is in demand. In the microthrusters which is used to the spacecraft such as the satellite for the attitude control, rarefied multiphase plume flow is also existed, which is becoming increasing important due to surface contamination and thermal control. 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. Accordingly this project is aiming to study the rarefied gas-particle two-phase plume flow. Based on the microcosmic physical parameters describing the movement of particles, the mechanical and thermal models of gas-particle interaction are constructed, the transportation mechanism of the momentum and the energy for gas-particle two-phase flow is also constructed, which is two-way coupling. The direct simulation Monte Carlo (DSMC) method is developed for the gas-particle two-phase flow in the region of rarefied gas. Simulations are performed for the verified case, the results show that the model agrees closely with the momentum and energy transfer mechanism. A Monte Carlo model is also presented for the particles with particle collision,consolidation and seperation,phase change which will influence the particle velocity and temperature, as well as the surrouding gas. A program for the two-dimensional flow and the axial symmetric flow of the gas-particle two-phase flow in the region of rarefied gas is formed. Simulations are performed for the case of gas-solid inverse jet from flat-nosed cylinder interacting with rarefied hypersonic external flows, the case of gas-solid transverse jet from a two-dimensional flat plate in the transitional regime and the case of rarefied multiphase plume flows into the vacuum. The structure of flow field and the aerodynamics properties on the surface are analyzed in details. The results show that the interacting flow fields are different on the varied Knudsen parameter and loading ratio etc.. The work of this paper may provide a new approach to describe the rarefied gas-particle two-phase plume flow, and provide basic flow field data for spacecraft contamination and satellite thermal control.
- Abstract document
- Manuscript document
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