洗流时差阻尼力矩及其影响因素分析

飞机做纵向不稳定曲线运动如扰动运动、俯冲及跃升的曲线段时，其俯仰角速度ｗｚ和迎角变化率ｄαｄｔ均有改变。分析纵向阻尼力矩时，除考虑ｗ＊ｚ引起的俯仰阻尼力矩Ｍｗｚｚｗｚ外，还应估算出ｄαｄｔ引起的洗流时差阻尼力矩Ｍαｚα。较详细地分析了洗流时差阻尼力矩的产生原理、大小及其影响因素，对飞行力学教学具有一定的参考价值

An Analysis to the Damping Moment of the Lag of Wash and Its Affecting Factors

When the aeroplane does the longitudial unsteady curve motion, like the disturbance motion, the diving or zooming curve, both its pitching angular velocity and angle of changing rate change. When analysing the longitudinal damping moment, not only should the pitching damping moment caused by the pitching angular velocity be considered, but the damping moment of the lag of wash caused by the angle of changing rate be calculated. This article analysis in detail the theory of the damping moment of the lag of wash and its size and affecting factors. It could have some referential values to the teaching of flight dynamics.