Application of Gas-Kinetic Unified Algorithm for Solving Boltzmann Model Equation with Vibrational Energy Excitation
Year: 2025
Author: Fan Li, Zhi-Hui Li, Jia-Zhi Hu, Wen-Qiang Hu
Communications in Computational Physics, Vol. 37 (2025), Iss. 1 : pp. 250–288
Abstract
In recent decades, the gas-kinetic unified algorithm (GKUA) is proposed to simulate the gas flow in the whole flow regimes. In previous studies, GKUA was extended to problems of flows around the aircraft and internal flows considering the influence of rotational energy, as well as the flows around the aircraft considering the influence of vibrational energy. In this paper, we try to apply the model considering the effect of vibrational energy to the engine internal and external mixed flow problem, and build a numerical simulation framework of engine internal and external mixed flow considering the effect of vibrational energy. The reliability of the algorithm is verified by using one-dimensional shock tube problem and two-dimensional nozzle internal flow problem. The results show that the model can describe the flow problem of high temperature nozzle internal flow. Then the two-dimensional nozzle internal and external mixed flow problem of 25N attitude control engine is studied, the unsteady evolution and non-equilibrium effect of the mixed flow field are analyzed, and the flow parameter distribution of the mixed flow field without internal energy excitation, considering rotational energy excitation and considering vibrational energy excitation are compared.
You do not have full access to this article.
Already a Subscriber? Sign in as an individual or via your institution
Journal Article Details
Publisher Name: Global Science Press
Language: English
DOI: https://doi.org/10.4208/cicp.OA-2024-0145
Communications in Computational Physics, Vol. 37 (2025), Iss. 1 : pp. 250–288
Published online: 2025-01
AMS Subject Headings: Global Science Press
Copyright: COPYRIGHT: © Global Science Press
Pages: 39
Keywords: Thermodynamic non-equilibrium Boltzmann model equation gas-kinetic unified algorithm aerodynamics covering various flow regimes nozzle flow.
Author Details
-
Modeling Non-Equilibrium Rarefied Gas Flows Past a Cross-Domain Reentry Unmanned Flight Vehicle Using a Hybrid Macro-/Mesoscopic Scheme
Yang, Weiqi
Men, Jing
Xu, Bowen
Ding, Haixia
Li, Jie
Drones, Vol. 9 (2025), Iss. 4 P.239
https://doi.org/10.3390/drones9040239 [Citations: 0]