双三角翼的翼面压力分布与空间涡态相关分析  

Correlative Analysis between Pressure Distributions and Vortex Patterns of Double Delta Wings

作　　者：冯亚南[1] 郑波[1] 权少平 

机构地区：[1]北京航空航天大学流体力学研究所

出　　处：《空气动力学学报》1999年第2期150-154,共5页Acta Aerodynamica Sinica

摘　　要：本文将双三角翼翼面测压试验结果与空间涡态观察测量结果进行了定性的相关对比分析，分析表明：垂直于双三角翼翼面的典型横截面上压力系数Ｃｐ展向分布与空间涡态有明显的对应关系，Ｃｐ分布的峰值数目反映了双三角翼的双涡态和单涡态，Ｃｐ峰值随α变化反映了涡强随α的变化，Ｃｐ峰值所在展向位置反映着涡核的展向位置，Ｃｐ峰形的平坦反映了涡的破裂。The pressure distributions on two models of the double delta wing are measured in the low speed wind tunnel in BUAA.They are 75°/45° and 75°/60° double delta wings with the sharp or the round outboard leading edge.The correlations between pressure distributions and the vortex partterns are studied.The analysis indicate that two peaks of the pressure distributions on some typical cross sections of the double delta wing characterize the double vortices while the one peak of those characterize the single or the merged vortex patterns.The position of the vortex core can be marked by the location of the spanwise pressure peak.The vortex breakdown can be displayed by the decrease in the pressure peak and the flat pressure distribution with an increase in angles of attack.The blunted outboard leading edge of the double delta wing causes inboard and outboard vortices close each other and stronger interaction.The pressure distributions and vortex breakdown positions are unsymmetric about the centreline of the wing due to a side slip.All of the unsymmetric vortex flow characteristics can be found on the correlative pressure distribution.

关 键 词：大迎角 分离流 双三角翼 压力分布 空间涡态 

分 类 号：V221.41[航空宇航科学与技术—飞行器设计]