商用客机驾驶舱通风系统的送风方式研究

Research on Air Supply Methods of a Typical Commercial Flight Cockpit Ventilation System

为了探究通风系统送风方式如何影响客机驾驶舱的空气质量,采用计算流体力学(Computational Fluid Dynamics,CFD)方法,针对波音737客机驾驶舱建立数值计算模型。研究重点对比不同送风模式下驾驶舱内的流场结构特点、乘员呼吸区的空气流速,并结合乘员呼吸区的污染物清除效率和空气龄进行空气质量的定量评估。结果表明:风挡进气口可能减缓呼吸区的空气流速,而个人通风口则可以显著提升乘员呼吸区的空气质量;周期信号送风技术可以有效提高空气净化效果,与恒值信号相比,污染物清除率提升7.5%,平均空气龄降低7.39%。

To investigate the impact of ventilation system air supply methods on air quality in the cockpit of a commercial aircraft,this study employs the Computational Fluid Dynamics(CFD)method to develop a numerical calculation model tailored to the Boeing 737 aircraft cockpit.The research prioritizes contrasting flow field structure characteristics within the cockpit across various air supply modes,analyzing the fresh airflow,and quantitatively evaluating air quality,taking into account pollutant removal efficiency and air age within the passenger breathing zone.Results suggest that windshield inlets may decelerate the airflow rate within the breathing zone,while the personal vent markedly enhance air quality in the passenger breathing zone;moreover,periodic signal air supply technology can effectively elevate air purification performance.In comparison with constant signals,the pollutant removal rate raises by 7.5%,and the mean air age is reduced by 7.39%.