基于Fluent的超音速雾化防灭火发泡装置流场仿真

Simulation on flow field of supersonic atomizing foaming device for fire prevention and extinguishing by FLUENT

为了研究新型泡沫除尘发泡器中的关键参数和流动特性,基于流体力学建立了发泡器内产生两相流动力学方程,并确定了相应的初始条件和边界条件;结合实测泡沫流动力学参数,采用FLUENT软件模拟研究了不同入口压力下在发泡装置内流场分布和变化特性并进行对比分析;模拟结果表明:随着入口初始压力增大,装置内混合液压力、速度均增大,但当进气压力为0.7 MPa、进液压力0.3 MPa时,出口压力满足防灭火需要。模拟思路及结果为防灭火装置研究及开发提供基础参数。

In order to study the key parameters and flow characteristics of new foam dedusting device,two-phase flow dynamics equation of foaming device was established based on fluid mechanics principle and the corresponding initial conditions and boundary conditions were determined. Based on the measured mechanical parameters of foam flow,by using FLUENT software,the distribution characteristics of flow field in the foaming device under different inlet pressure were compared and analyzed. The simulation results show that with the increase of initial inlet pressure,the pressure and speed of the mixture increases,when the intake pressure is 0. 7 MPa and the liquid inlet pressure 0. 4 MPa,the outlet pressure can meet the needs of fire prevention and extinguishing. The simulation ideas and results provide basic parameters for the research and development of fire prevention and extinguishing devices.