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ACTA AERONAUTICAET ASTRONAUTICA SINICA ›› 2019, Vol. 40 ›› Issue (12): 123190-123190.doi: 10.7527/S1000-6893.2019.23190

• Fluid Mechanics and Flight Mechanics • Previous Articles     Next Articles

Integrated numerical analysis of fluid-thermal-structural problems in “Type Ⅳ” shock wave interference

LI Jiawei, WANG Jiangfeng, YANG Tianpeng, LI Longfei, WANG Ding   

  1. Key Laboratory of Unsteady Aerodynamics and Flow Control of Ministry of Industry and Information Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China
  • Received:2019-05-30 Revised:2019-06-17 Online:2019-12-15 Published:2019-07-10
  • Supported by:
    the Development Foundation for Major National Defense Projects of NUAA (NP2018402);National Numerical Wind Tunnel Project (NNW2018-ZT3B08);A Project Funded by the Priority Academic Program Development of Jiangsu Higher Education Institutions

Abstract: An integrated fluid-thermal-structural numerical method based on the finite volume method is proposed to study the thermal behavior of the multi-physical coupling of aerodynamic heating and thermal structural heat transfer for hypersonic cylindrical leading edge with "Type IV" shock wave interference. In this method, the external high-speed flow field and the internal structural temperature field are unified into the integrated governing equations, and the finite volume method is used to perform unified discretization and solution, avoiding the cumbersome data exchange strategy of the traditional partitioned coupling approach. In addition, a new dual temperature resistance model is developed to calculate the physical parameters on the flow-solid interface to ensure the calculation accuracy. The LU-SGS implicit time-stepping scheme and the adaptive unsteady time-step size are used to improve the calculation efficiency. The aerodynamically heated cylinder leading edge is in good agreement with the references and the experimental data, demonstrating the capability and reliability of the integrated method. Issues of the thermal structural response are studied for "Type IV" shock wave interference on hypersonic cylindrical leading edge. The property distributions of temperature and heat flux are obtained and the time-variant characteristics are presented and analyzed. The numerical simulation results show that the jet produced in "Type IV" shock interference impinges perpendicularly to the surface,and shock interference increases the maximum pressure coefficient by about 9 times and the maximum heat flux by about 4.7 times, posting severe challenges to the design and selection of thermal protection for high-speed vehicle. These results also show that the integrated method can provide theoretical and technical support for the comprehensive performance evaluation and optimization of hypersonic thermal protection systems under long-endurance flight conditions and complex flight environments.

Key words: “Type IV” shock wave interference, fluid-thermal-structural coupling, integrated numerical method, hypersonic, finite volume method

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