摘要
在分析飞机的纵向阻尼力矩时，除考虑俯仰角速度引起的俯仰阻尼力矩外，还应估算出迎角变化率引起的洗流时差阻尼力矩。根据洗流时差阻尼力矩产生的原理，推导并给出了它的计算方法。介绍了各种阻尼导数的表示方法及相互关系。最后较详细地分析了水平尾翼、马赫数、迎角变化率和下洗角随迎角的变化率诸因素对洗流时差阻尼力矩及阻尼导数的影响。
When analysing the longitudinal damping moment of a aircraft, not only should the pitching damping moment caused by the pitching angular velocity be considered, but the damping moment of lag of wash caused by the rate of change of angle of attack be calculated. This article is to analyze in detail the cause of the damping moment of lag of wash, the calculating method of which is also presented. Various expressing ways of dmping derivative, along with the relationships, are then given here. Finally, a thorough study on horizontal tail, the rate of change of angle of attack, the Mach number and the rate of change of the downwash angle along with the change of angle of attack is carried out. And the various affecting factors on the damping moment of lag of wash and damping derivative is also clearly shown.
出处
《飞行力学》
CSCD
北大核心
1998年第2期74-77,共4页
Flight Dynamics
关键词
洗流
时差阻尼力矩
时差导数
影响因素
飞机
The damping moment of lag of wash The derivative of lag of wash Affecting factors
