Analytical Temperature Of High Speed Gas Ejection Pipe Under Natural Convection Heat Transfer To Air

The equipment of ejector has been used in a variety of applications because of its simplicity, reliability, and versatility. As the developing of aerospace technology, the times of altitude simulation experiments were increasing. When the ejecting or ejected high speed fluid temperature is high ,it is important to analyze the rule of temperature distribution of ejector wall.The rule of flow in the ejector and fluid temperature distribution are achieved by numerical simulation method is compiled. It makes preparations for the next step. And through comparing three work states of ejector, ejecting of cold-flow, ejecting of high-enthalpy and altitude simulation experiments, the temperature of ejected fluid is different. The results show that when the temperature of ejected fluid became higher in the pipe, the fluid temperature in the ejector become higher, and the rule of flow is uniform.We assimilate thermal resistance to equivalent resistance. Through the method of finite volume element, numerical simulation was performed for the hyperthermia ejector under natural convection heat transfer to air. In order to verify the results, method of thermal flow couple was applied to compute the flow and the temperature distribution of pipe wall.As the temperature of the ejector wall has been got, we analyze the natural convection of single pile and multi pipes under large space and confined space, and comparing the effect as the related parameters were changed.