Investigating the flow field and thermal environment of the rocket gas jet impinging on the launch platform
In order to deeply study the gas impingement flow field of a launch platform composed of a liquid launch vehicle power system,the numerical simulation method was used to study the flow field and the thermal environment of the launch platform during the launch phase of the launch vehicle.Based on three-dimensional multi-component compressible Navier-Stokes equations,the Realizable k-ε two-equation turbulence model and the second-order upwind total variation diminishing(TVD)format discretization,the gas jet model of the launch phase of the dual-nozzle launch vehicle is conducted.The results show that with the increase of the rocket take-off altitude,the expansion angle of the gas jet increases gradually,and the interaction between them is enhanced.The impact of the jet on the launch platform shows a trend of first rising and then falling,with the impact at 0 m being the smallest,and the impact at 20 m being the largest.The maximum peak temperature of the support arm surface is 706 K,which is about 127% higher than that under the lowest working condition.The temperature and pressure of the cover plate surface increase with the increase of the rocket take-off altitude in the early stage,and decrease with the increase of the rocket take-off altitude in the later stage.The research method in this paper provides a reference for the safety design of the launch platform.
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维普
