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采用大涡模拟方法数值模拟了障碍物后池火与水喷淋的相互作用问题,研究目的是探讨水喷淋对障碍物后池火的控制和抑制的有效性,以及障碍物对流动特性和温度场的影响。文中采用低马赫数近似下三维可压缩滤波形式的Navier Stokes方程和组分方程进行有限差分数值求解,燃烧过程中所产生的热释放采用携带燃烧反应热的Lagrangian粒子(热元模型)来模拟。文中数值模拟了风洞内障碍物后热源产生的热气流及其与水喷淋的相互作用,并探讨了在有无水喷淋情况下的温度场和速度场特性,以及喷水装置位置对温度场的影响。
The large eddy simulation method is used to simulate the interaction between the obstacle rear pool fire and water spray. The purpose of this study is to investigate the effectiveness of water spray on the control and suppression of obstacle rear pool fire as well as the effects of obstacles on flow characteristics and Effect of temperature field. In this paper, Navier Stokes equations and component equations of three-dimensional compressible filter with low Mach number are used to solve the finite difference numerical solution. The heat release generated during the combustion process is simulated by Lagrangian particles (thermo-element model) with combustion reaction heat. In this paper, the hot air flow generated by the post-heat source in the wind tunnel and its interaction with water spray are numerically simulated. The temperature field and velocity field with or without water spray are discussed. Effect of temperature field.