游步甲板区域烟雾扩散特性数值模拟

Numerical Simulation of Smoke Pervasion for Passenger Deck Area

基于N-S方程,利用Fluent软件进行数值模拟。通过分析湍流区域、速度比k(0.5、1.0、1.5、2.0)、偏航角φ(0°～30°,步长为5°)对烟雾扩散特性的影响可得:在偏航角度φ=0°时,排除烟囱本身的局部空气动力学干扰,发现烟雾对称扩散,速度比k大于1.5时烟雾下洗现象基本消除;在k=1,φ=20°时可以明显地观察到在烟囱背部开始产生下洗现象。

The numerical analysis is made based on the Navier Stokes equations and numerical simulation is conducted using Fluent software.By analyzing the effects of turbulent region,four velocity ratios(k=0.5,1.0,1.5 and 2.0)and seven yaw anglesφ(0~30°in steps of 5°)on the smoke pervasion,the results show that the smoke pervasion pattern is symmetrical about the longitudinal mid section when yaw angle is 0°,eliminating local aerodynamic interference from the chimney.The downwash does not occur when the velocity ratio k is more than 1.5,and when k is 1.0 andφis 20°,the downwash is found on the back of the chimney.