船用柴油机阻燃式防爆阀的压力降分析

提出一种阻燃式防爆阀的压力降分析方法.通过分析阻燃式防爆阀的结构和工作原理，建立了数值分析模型.借助计算流体力学技术，分析了不同的入口温度和入口压力对阀内压力分布的影响.结果显示，入口温度对阀内压力分布的影响不大，入口压力对阀内的压力分布有影响.拟合不同入口压力时基本单元截面的压力值，得到各截面的压力与入口压力、基本单元数的函数关系.该函数关系能够有效地反映阀内的压力降趋势，计算出各基本单元截面的压力值，从而可以指导具体的阻燃式防爆阀的设计.

Pressure Loss of Explosion-Proof Valve with Flame Arrester for Ship's Diesel Engine

A method of pressure loss analysis for explosion-proof valve with flame arrester sheets was presented. The structure and operational principle of the explosion-proof valve was analyzed and its numerical analytical model was established. The effect of different inlet temperature and inlet pressure on the pressure distribution inside the valve was analyzed using computational fluid dynamics (CFD) technology. The result showed that the influence of inlet temperature on pressure distribution was small while that on pressure distribution was significant. The fitting function for the pressure on the surface of each section of the basic element under different inlet pressures was done. Besides the function relationship for the pressure on the surface of each section and inlet pressure and the amount of the section was obtained. This function relationship could efficiently reflect the pressure loss and calculate the pressure of the surface of each section of the basic element, which is of importance to the design of explosion-proof valve with flame arrester
sheets.