Simulation Of The Flame-Explosion-Proof Vavle By Using Fluent

The explosion accidents on ship’s diesel engines happened all the time in the past, so the international association of classification societies required that the flame-explosion-proof valve must be installed on the ship’s diesel engine as a safety device in Aug.1,2008. Currently, it is not ideal in the flame-explosion-proof valve research, and it stays doing experiments. Therefore, it is necessary to study the principles of depressurization and flame-proof theoretically.The principles of depressurization and flame-proof were explored and studied by using CFD simulation software called FLUENT. And according to the structure characteristics and working characteristics of the newly flame-explosion-proof valve, the rapid calculating model was put forward. The relationships between depressurization, flame-proof and layer number of the boss, between depressurization, flame-proof and flow area were studied and the judgment rules of depressurization and flame-proof was advanced. Finally, by using uniform design method, weighting method, FLUENT simulation technology, and regression analysis method, the structure size of flow channel was optimized, and a better size of the structure of the flow channel was obtained.This paper mainly included:1、The research situation of the flame-explosion-proof valve at home and abroad was summarized, and the necessity of CAE simulation was pointed out.2、According to the structural characteristics and working characteristics of the flame-explosion-proof valve, the rapid calculating model was put forward and elementary analytical unit was obtained. Therefore, the computational efficiency was improved. It laid the foundation for the follow-up study of the flame-explosion-proof valve.3、Simulation analysis of the flame-explosion-proof valve. The relationships between depressurization, flame-proof and layer number of the boss, between depressurization, flame-proof and flow area were studied and the judgment rules of depressurization and flame-proof was advanced by using rapid calculating model and CFD simulation software called FLUENT based on the i type of the flame-explosion-proof valve.4、Experimental verification. The experiment was designed and experimental platform was set up, the reasonableness of simulation analysis and the rapid modeling method was verified.5、Optimization based on the uniform design. By using uniform design method, weighting method, FLUENT simulation technology, and regression analysis method, the structure size of flow channel was optimized and the optimization result was obtained.