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词汇 Rocket nozzle
分类 英语词汇 英语翻译词典
释义

Rocket nozzle

中文百科

火箭发动机喷管 Rocket engine nozzle

（重定向自Rocket nozzle）
渐缩渐阔喷管，颜色从绿到红显示流速近似增长趋势
渐缩渐阔喷管，展示流速(v)在流动方向上增大，温度(t)和压力(p)降低。马赫数(M)从亚音速，音速，增长到超音速。
喷管可以是完全膨胀，围压或过度膨胀。不完全或过度膨胀都会损失效率，超过度膨胀损失的效率较少，但尾气流不稳定。[7]

火箭发动机喷管是用于火箭发动机的一种（通常是渐缩渐阔喷管）推力喷管。它用于膨胀并加速由燃烧室燃烧推进产生的燃气，使之达到超高音速。

英语百科

Rocket engine nozzle 火箭发动机喷管

（重定向自Rocket nozzle）
Figure 1: A de Laval nozzle, showing approximate flow velocity increasing from green to red in the direction of flow
Nozzle on the first stage of an RSA-3 rocket
Diagram of a de Laval nozzle, showing flow velocity (v) increasing in the direction of flow, with decreases in temperature (t) and pressure (p). The Mach number (M) increases from subsonic, to sonic at the throat, to supersonic.
Nozzles can be (top to bottom):underexpanded,ambient,overexpanded,grossly overexpanded.If a nozzle is under- or overexpanded, then loss of efficiency occurs relative to an ideal nozzle. Grossly overexpanded nozzles have improved efficiency relative to an overexpanded nozzle (though are still less efficient than a nozzle with the ideal expansion ratio), however the exhaust jet is unstable.[7]

A rocket engine nozzle is a propelling nozzle (usually of the de Laval type) used in a rocket engine to expand and accelerate the combustion gases produced by burning propellants so that the exhaust gases exit the nozzle at hypersonic velocities.
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