Numerical Simulation and Analysis of Thermal and Elastic Performance for Glass-steel Launch Tube

The glass-steel launch tube takes on complex mechanics characteristic of thermal and elastic coupling under the action of rocket projectile and high temperature burning gas jet flow. The numerical simulation and analysis of burning gas jet flow fields and thermal-elastic coupling were done with finite element method for a certain type glass-steel launch tube. Then the distribution of burning gas jet flow field and influence to launch tube were mastered,the numerical results and thermal-elastic characteristic of thermal and structure coupling for glass-steel launch tube were gained,and with the changes of physical character parameters,the influence rules to the parameters of thermal and elastic performance of launch tube were realized. The numerical results indicate that the thermal action of burning gas jet flow to launch tube is very strong,the temperature distribution of launch tube shows grads from inner to outer,the tube body temperatures gradually accord with atmosphere temperatures around after five minutes,and the changes of physical character parameters bring some influence to the parameters of thermal and elastic performance of launch tube. The simulation study provides theory warranty and important references for the design of thermal performance and structure of launch tube.