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汉语拼音：shī sù

飞机或机翼在迎角大于最大升力迎角时工作的情况，其特点为气流分离，操纵失效。

失速 [飞行体以小攻角@@@@@angle of attack@@@@@飞行时，会有升力和阻力作用于飞行体上，此升力将依攻角的增加而增大。但是当攻角增加到@@@@@°－@@@@@°时，流场在机翼的背面上会完全剥离，此时升力明显地下降，而阻力却增加，结果造成飞行体不再能飞行，是为失速。#####]

1. 飞行体以小攻角@@@@@angle of attack@@@@@飞行时，会有升力和阻力作用于飞行体上，此升力将依攻角的增加而增大。但是当攻角增加到@@@@@°－@@@@@°时，流场在机翼的背面上会完全剥离，此时升力明显地下降，而阻力却增加，结果造成飞行体不再能飞行，是为失速。

• This paper use the software FLUENT to simulate numerically effects of the big camber and stall delay on the wind turbine performances.

  本文通过FLUENT软件分别对原型叶片、大弯度叶片和失速延迟叶片进行三维数值模拟计算。

• They made a few unusual maneuvers while they were up there, including flying sideways and inducing stall warnings.

  在高空他们做了一些不寻常的动作，包括飞行侧身和诱导失速飞行。

• For comparison the stall lines of a multi-stage axial flow com-pressor have been predicted with these two models respectively .

  为了比较，在数字机上分别用这两种模型预算了一台多级轴流压气机的失速线。

• The hinge moment coefficient breaks before the stall of angle of attack and can be used for predicting stall more safely.

  铰链力矩系数在失速迎角达到之前就发生突变，可以更安全地用来预测失速的发生。

• Finally an overview of current state of active control of rotating stall and surge strategies is categorized by the type of actuators.

  最后，本文针对不同类型的控制器，分别对旋转失速与喘振主动控制策略进行了总结。

• Airfoil trailing-edge vortex separation occurs, resulting in movement of the flow field near the airfoil stall.

  翼型后缘出现的分离涡，导致翼型附近流场的流动失速。

• At 2 per cent, however, "stall speed" connotes an inability to behave like the historical capitalistic model should.

  但2%的“失速式”增长，意味着西方无法重现过去那种资本主义模式下的运转。

• If needed, Beijing is capable of passing the fiscal expansion policy to resist to possible stall of economy increase.

  如果有需要，北京完全有能力通过财政扩张政策，抵挡可能出现的增长失速。

• The injective numerical results showed that the injection of upstream near the rotor leading 30% axial chord edge can suspend the stall.

  喷气数值计算结果表明，转子上游约30%轴向弦长处的喷气推迟了失速的发生。