Research on Cooling Characteristics of a New Transpiration Cooling Thrust Chamber Based on Metal Additive Manufacturing Technology
At present,high heat load components in the aerospace field are facing increasingly severe thermal environment tests.In this paper,a new transpiration cooling thrust chamber is designed and manufactured by metal additive manufacturing technology,and the overall cooling performance of the new transpiration cooling thrust chamber is studied by high temperature gas heat transfer test.It is found that the new transpiration cooling thrust chamber has the characteristics of high efficiency and economy to cope with the improvement of external thermal environment,and the improvement of coolant supply can further greatly improve the cooling effect.In the experimental study of temperature ratio(K=4.47～5.12)and flow ratio(M=0.03～0.15),the influence of flow ratio on the inner wall temperature and comprehensive cooling efficiency is much greater than that of temperature ratio.And there is an optimal flow ratio to maximize cooling efficiency and cooling economy.The new transpiration cooling thrust chamber based on metal additive manufacturing technology studied in this paper has simple processing method and high overall cooling efficiency,which can provide reference for the design,processing and manufacturing of advanced aerospace thermal protection cooling structure in the future.
transpiration cooling rocket thrust chambermetal additive manufacturing technologyheat transfer testoverall cooling efficiencyoptimal flow ratio
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