亚音速民机垂尾初步设计

横航向飞行品质要求是飞机设计时,选择垂尾和机翼上反角的主要依据.在对主要的横航向飞行品质要求进行分析整理的基础上,本文提出了一种“界限线”法,可供飞机初步设计时,选择合适的垂尾和机翼上反角之用.为说明这种方法的可行性和可靠性,以Y—7型飞机为算例进行了验证性计算。

VERTICAL TAILPLANE DESIGN OF SUBSONIC CIVIL AEROPLANE

Flying quality requirement is the basic criterion for tailplane sizing in aeroplane preliminary design. Most of tha main lateral and directional flying qualities are collected and expressed in simple formulas with which the relation between vertical tailplane area or vertical tailplane volume and the wing dihedral angle are determined. Using these different requirements many boundaries could be drawn in the parametric plane of vertical tailplane area and wing dihedral angle. A common area which satisfies all of the requirements will be found, the demand vertical tailplane area and the appropriate wing dihedral angle will be selected. As a calculation example, civil aeroplane Y-7 is used, the results showed that the method mentioned in this paper is feasible and reliable for engineering use.