二、直升机空气动力学
1、滑流理论
英文释义中文释义备注说明momentum theory滑流理论vertical flight垂直飞行hover悬停
in descent/vertical descent/vertical climb下降/上升induced power/velocity诱导功率/速度outflow流出流
inflow流入流disc桨盘streamtube流管线flow pattern流型steady/unstead定常/非定常
downwash/upwash下洗流/上洗流kinetic energy动能compressibility effect压缩性效应tip loss叶尖损失
2、叶素理论
Blade Element Theory/Elementary Blade Theory 叶素理论section shape剖面inflow angle来流角airfoil翼型
blade incidence桨叶迎角lift slop 升力线斜率blade span翼展（相对于旋翼而言）leading edge前缘trailing edge后缘
blade桨叶沿半径从内向外分为三个部分：inboard、mid-span、tip partsnon-uniform flow 非均匀来流
ideal twist儒氏旋翼blade mean lift coefficient平均升力系数与升力系数不是同一个概念
三、前飞理论部分
英文释义中文释义备注说明
advance ratio前进比advancing side前行桨叶retreating side后行桨叶flapping motion挥舞运动flapping hinge挥舞铰flapping coefficient挥舞系数region of reversed flow反流区
Equilibrium Equation力平衡方程Coriolis force/moment哥氏力/哥氏力力矩interia force/moments惯性力
restraining force约束力gravitational force/moments重力/力矩damping 阻尼mechanical damper机械阻尼器
gyroscopic moment陀螺力矩crosscoupling交叉耦合oscillatory bending stress振荡弯曲应力
roll moment滚转力矩resultant force/moment合力/合力矩 A be communicated to B 力A传到B
lead-lag hinge摆振铰feathering hinge变距铰oncoming stream direction迎流方向reference plane参考面
separated flow气流分离全称:retreating blade stallblade stalling桨尖失速全
称:advancing blade compressiblity drag
riseazimuth angle方位角shock induced flow seperation激波-气流分离stalling characteristic失速特性
free stream dynamic pressure自由来流动压boundary layer附面层
asymmetry/symmetry不对称/对称
flow reversl气流反向horizontal tailplane水平安定面vertical fin垂直安定面lateral/longitudinal cyclic coefficient横向/纵向周期变距headwind逆风tailwind顺风
四、性能计算部分：
英文释义中文释义备注说明
performance assessment性能评估helicopter performance calculation直升机性能计算ground effect地面效应
autorotation自转飞行high rate of climb悬停升限wind tunnel test风洞测试patrol/loiter task巡航飞行
cruise speed巡航速度weight capability承重能力rate of climb 爬升率absolute ceiling绝对升限
service ceiling 实用升限optimum speed 最佳速度minimum rate of descent 最小下降率
maximum edurance/loiter time 最大续航时间maximum glide distance最大航行距离maximum range最大航行里程maximum speed最大速度specific range比航程
dihedral action上反作用
longitudinal/lateral trim equation纵向/横向配平方程shaft power轴功率power requirement需用功率
induced requirement诱导功率stability 稳定性static stability静稳定dynamic stability动稳定
incidence disturbance动稳定扰动的几种情况forward speed disturbance angular velocity disturbance
sideslip disturbance yawing disturbance
stability augmentation system增稳系统。