摘要
大气飞行条件下机翼附近的跨声速湿空气流动中空气中含有的水蒸汽可能越过饱和线而发生非平衡凝结。水蒸汽凝结潜热加热气流会改变跨声速流动的特性,从而对机翼气动特性造成显著影响。本文建立了湿空气非平衡凝结流动的数学物理模型,对ONERA M6机翼在跨声速条件下的湿空气非平衡凝结流动进行了分析。结果表明,与干空气流动相比,在攻角为3.06°和空气相对湿度为50%时,ONERA M6机翼表面压力系数有显著变化。造成机翼气动特性显著变化的原因在于:湿空气中水蒸汽凝结放热对跨声速气流加热,导致机翼表面附近的流速、压力与流场结构发生了显著变化。
In atmospheric flight condition, water vapor carried by the transonic flow of moist air around a wing may expand across the saturation line and lead to non-equilibrium condensation. The addition of latent heat to moist air can obviously change the behavior of transonic flow. As a result, the aerodynamic characteristics of wing may be significantly affected. A numerical model of moist air flow with non-equilibrium condensation was established. With this model, numerical simulations were conducted to investigate the aerodynamic characteristics of the ONERA M6 wing in transonic flow of moist air. Compared with the results in dry air flow, the pressure coefficient at 3.06° angle of attack and 50°relative humidity is obviously changed in moist air flow. The mechanics leading to the change was analyzed. With the condensation of water vapor in moist air, latent heat is released and added to the surrounding air. As a result the velocity, the pressure and the flow field structure of the moist air are significantly changed.
出处
《空气动力学学报》
EI
CSCD
北大核心
2010年第2期143-148,共6页
Acta Aerodynamica Sinica
关键词
湿空气
非平衡凝结
ONERA
M6机翼
气动特性
moist air
non-equilibrium condensation
ONERA M6 wing
aerodynamic characteristics
