粒径及送风方式对飞机座舱颗粒物分布的影响  

Influence of particle size and air supply mode on the distribution of particulate matter in aircraft cockpit

作　　者：王萌 王学德[1] Wang Meng;Wang Xuede(College of Energy and Power Engineering,Nanjing University of Science and Technology,210094,Nanjing,China)

机构地区：[1]南京理工大学能源与动力工程学院,南京210094

出　　处：《应用力学学报》2021年第4期1551-1558,共8页Chinese Journal of Applied Mechanics

基　　金：江苏省青蓝项目;国家留学基金委出国留学基金项目。

摘　　要：通过合理简化波音737-200飞机的座舱,建立物理模型后,用计算流体力学(CFD)方法研究了粒径及送风方式对飞机座舱颗粒污染物分布的影响。用FLUENT软件计算分析了天花板送风和侧壁送风方式下飞机座舱内的流场;并在座舱中设置污染源,瞬态释放了1μm、10μm、20μm三种粒径的颗粒物,在机舱设置了不同的颗粒物浓度监测点并对整个机舱内颗粒物的浓度随释放后时间的变化情况进行比对,研究了这三种粒径的颗粒物在两种送风方式下的分布情况与排除速率。研究结果表明:粒径越小,颗粒物在机舱内扩散能力越强;天花板送风时,颗粒物更易集中于机舱中间过道及机舱后侧,且颗粒物排出速率与粒径成反比;侧壁送风时,颗粒物更易集中于机舱两边侧壁及机舱前侧,且粒径大小对排除速率的影响与释放后的时间有关。In this paper,influence of particle size and air supply mode on the distribution of particulate pollutants in aircraft cockpit is studied by computational fluid dynamics(CFD)method.After reasonably simplifying the cockpit of Boeing 737-200,the physical model is established.By using FLUENT software,the flow field in the cockpit under ceiling and sidewall air supply is calculated and analyzed,then the pollution source is set in the cockpit,and the particles of 1μm,10μm and 20μm diameters are released in an instant.The distribution and removal rate of the three particle sizes under the two air supply modes are studied through the change of the concentration of particles on the monitoring surface set in the cockpit and the concentration of particles in the whole cabin with time.Results show that the smaller the particle size is,the stronger the diffusion ability of the particles in the cockpit is.When the ceiling air supply,the particles are more easily concentrated in the middle aisle and the back side of the cockpit,and the particle emission rate is inversely proportional to the particle size.When the side wall air supply,the particles are more easily concentrated in the side walls and the front side of the cockpit,and the effect of the particle size on the removal rate is related to the time.

关 键 词：飞机座舱 颗粒污染物 粒径 送风方式 

分 类 号：V245.3[航空宇航科学与技术—飞行器设计]