Study On Temperature Field And Stress Field Of Engine Nozzle

Enginge nozzle is a important component which play a vital function forcombustion outcome's acceration and inflation．The inner surface usually sustainultra-high temperature and air pressure．In order to prevent the heat transfer from thissite to substrate,thermal barrier coatings technology is applied in nozzle'sdesigning．Obtaining the value changes of sprout at different time is very helpful toinstruct and optimize the design of rocket sprout without question．However,concernthe development level of modem testing technology,it is difficult to measure thetemperature value or stress value in such a short process．So we employ the infinite element method to simulation reality in that case with the purpose to get datas change in rocket sprout when high heat is loaded． The content of this paper include below key points,(1)From the result output by Marc．Mentat,Analysis heating distribution inside the nozzle and decide that flux heat conductivity ofthe flow ofburning gas and heat radiation of the high temperature gas tothe inside wall of nozzle is the main way of conductivity．(2) From the result output by Marc．Mentat, we compare the influences result from the thickness changes of the mid-bond layer between ZrO₂,and draw the conclusion that decreasing the thickness could relief the heat filled up in the nozzle.(3) Analysis the stress distribution characteristic in the models with multiple mid-bond layers or single layer of coating.