稳态热边界客机座舱实验平台搭建及实验验证

Establishment and validation of an airliner experimental platform with stable thermal boundary condition in an aircraft cabin

在一架暴露于室外环境的全尺寸MD-82型飞机上建立了一个客机座舱实验平台,用来验证数值模拟模型的准确性和研究座舱气流组织。为了获得机舱稳态热边界条件,在飞机外表面铺设闭孔海绵保温材料,并通过地面空调机组向座舱内提供恒温空调送风,辅以模拟真人发热的假人模型。采用一套热电偶系统测量热边界条件,并建立了一维非稳态导热数值计算模型,对夏季室外条件下平台热边界进行预测。实测和数值模拟结果都证明,每一个实验日内座舱内壁面的热边界温度值波动都小于±0.25℃;但不同月份间壁面温度的变化值超过±1℃。因此需合理安排夏季实验日程,以避免室外高温导致的实验误差。

Establishes an airliner experimental platform in a full-size MD-82 aircraft cabin outside for the validation of numerical simulation models and the airflow distribution study in an aircraft cabin.To obtain stable thermal boundary conditions in the cabin,covers the aircraft with the insulation materials of closed-cell foam,and supplies the thermostatic air provided by a ground air conditioning unit,and then places the manikins to simulate real human generating heat.Uses a thermocouple system to measure thermal boundary conditions,and establishes a set of one-dimensional numerical simulation model of unsteady heat conduction to forecast the temperature of sidewalls in the cabin under the outdoor conditions in summer.The results of both measurement and numerical simulation all validates that the temperature fluctuation of thermal boundary in one experimental day is smaller than ±0.25 ℃,but the temperature fluctuation in different months would extend to more than ±1 ℃.Therefore,the experiment period needs to be arranged reasonably to avoid the measurement error from the high outdoor temperature.