跨音速飞行中机翼水汽凝结的数值模拟研究

Numerical Simulation Research on Condensation of Water Vapor Around Airfoil in Transonic Flying

飞机在大气中跨音速飞行时,机翼附近的空气压力会发生剧烈的变化,引起局部饱和水汽压的波动,使其中含有的水蒸气可能高于饱和线而发生凝结,这会对机翼的空气动力学特性造成影响。本文以NACA0012翼型为研究,建立在湿空气中飞行时的气流及水汽凝结的数学模型,分析了在跨音速飞行时,攻角α为0°、2°、4°,空气相对湿度φ为20%、40%、60%、80%的情况下水汽凝结情况进行了模拟分析,得出在上述几种状态下的水雾分布情况,为针对水雾对机翼空气动力学特性影响的研究提供了一定的依据。

The air pressure arouml airfoils would be changing severely during transonic flying in atmosphere, thai would vary lhe partial saturation vapor pressure lower to make the vapor carried by moist air condense for it may expand across the saturation line, which couhl affect the aerodynamic characteristics of airfoils. The numerical model of vapor condensation and airflow during flying in the moist air about the NACA0012 airfoil was established, the situations of vapor condensation in transonic flying under the angle of attack were 0°, 2° and 4°, and the relative humidity were 20%, 40%, 60% and 80% were analysed, the distributions of vapor under situations above were got, which provide the eertain basis to the studies about water mist effect on airfoil aerodynamic charaeteristics.