A study on the measures to cut down twin-tails' unfavorable influences

作者：Zheng Sui^*; Li Gui Sheng; Cai Guang Ping; Ang Hai Song

来源：Journal of Experiments in Fluid Mechanics, 2012, 26(1): 66-69.

• Adverse pressure gradient
• Canard configuration
• CFD method
• Expected effects
• High AOA
• Incline angle
• LEX-wing configuration
• Small size
• Twin-tails
• Vertical tail
• Vortex lift
• Wind tunnel tests

The research was done on a typical canard configuration with twin-tails to find why tails always reduce the lift at high angle-of-attack by using CFD method. It was found that the vortices passing above induced a "sideslip" flow field in the region tails located. The tails thus had higher pressure on the inboard side which put an adverse pressure gradient in the field. It was this gradient to weaken and destabilize the vortices and then to reduce the vortex lift on the whole model. Based on the findings, three improving measures were designed, which were small size vertical tails, toe-in vertical tails and different tail incline angles. The wind tunnel test results showed that the first two received expected effects.

• 出版日期2012
• 单位南京航空航天大学