CAJ | 학술논문

采用数值模拟和理论分析相结合的方法，研究了前缘剖面形状对双三角翼涡运动的影响，分析了前缘剖面形状对三角翼、双三角翼涡运动影响的不同机理：对三角翼，尖前缘可以形成组织最好的涡结构，但对于双三角翼，圆前缘生成的旋涡结构较靠近翼面，涡结构紧密，诱导能力较强，可以形成有利的涡涡干扰，使内翼涡通过剪切层向外翼涡输入涡量更加容易，合并涡变得更加稳定，推迟了涡破裂，而且由于涡较靠近翼面，因而可以产生较高的非线性涡升力，这同传统的认识是不一致的。
채용수치모의화이론분석상결합적방법，연구료전연부면형상대쌍삼각익와운동적영향，분석료전연부면형상대삼각익、쌍삼각익와운동영향적불동궤리：대삼각익，첨전연가이형성조직최호적와결구，단대우쌍삼각익，원전연생성적선와결구교고근익면，와결구긴밀，유도능력교강，가이형성유리적와와간우，사내익와통과전절층향외익와수입와량경가용역，합병와변득경가은정，추지료와파렬，이차유우와교고근익면，인이가이산생교고적비선성와승력，저동전통적인식시불일치적。
The effects of different leading-edge profiles on the vortex flows over double delta wings were investigated both numerically and theoretically. And the different mechanisms of the leading-edge profiles affecting the vortex flows over both single-delta-wings and double-delta-wings were analyzed and contrasted. While over single delta wings, the structures of the vortices resulting from sharp leading-edges are organized best, over double-delta-wings, the structures of the vortices resulting from round leading-edges are closer to the wing surface, and are tighter than those resulting from sharp leading-edges. This shows that, over double-delta-wings, round leading-edges have stronger inducement abilities, and can constitute more favorable vortices interactions, which makes it easier to transfer vorticity from the inner vortices to the outer vortices through the shear layers. Thus, the combined vortices become more stable, and the vortices breakdown can be well prolonged. Moreover, because they are closer to the wing surface, the vortices resulting from round leading-edges can provide a higher nonlinear lift than under other circumstances, which is different from the traditional views.