| Vertical launching system as a main launching way for shipboard missile is under a condition of high temperature and high pressure in the launching process. The exhaust gas jet impinging flow in a vertical launcher has been widely concerned.In this paper, the survey of a vertical launching system and the relative research on the subjects is introduced. The two-dimensional axisymmetric exhaust gas jet flow in the launch tube and the three-dimensional flow field in a vertical launching system are numerically simulated. The distribution of parameters in the two-dimensional axisymmetric flow field is analyzed, the influence of chamber pressure, configuration of nozzle, height of launching and the size of canister on the structure of shock wave, the strength of shock wave and mass flow rate of by-blow flow are discussed. Three-dimensional flow field of a vertical launching system and laws of parameters are studied particularly in this paper. Exhaust gas flow in the canister, jet impingement flow field in the plenum and the characteristics of flow in the uptake are presented. The effects of the chamber pressure, launch heights and the size of missile on the shape of exhaust gas jet flow, the mass flow rate of by-blow flow and flow fields on the bottom plate in the plenum are analyzed. The results are well in agreement with that of the references. The conclusion drawn in this paper provides reference for further studying of exhaust gas jet flow in vertical launching system.
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