多普勒测速系统(Doppler velocity-measuring system)是利用多普勒效应测定飞行器径向速度的无线电跟踪测量系统。由地面向飞行器或由飞行器向地面发射固定频率的等幅电磁波,因飞行器与测控站存在相对运动,接收信号的频率与发射信号的频率互不相同。其频率之差就是多普勒频移。多普勒频移正比于测控站-航天器方向上的速度分量,所以测出多普勒频移的大小,就可获得目标对测控站的相对径向速度。
本文设计了一套激光多普勒测速系统,并对该系统作了理论分析和计算。
A laser Doppler velocimetry system is designed, and its theoretical analysis and computation are made.
用三维激光多普勒测速系统测量研究了一个离心压气机转子近端壁区三维紊流流场。
Three-dimensional turbulent flow of the endwall region inside a centrifugal compressor impeller was studied using a Laser Doppler Velocimetry.
采用激光多普勒测速系统测试了蜗壳式旋风分离器内的流场,分析了环形空间内的湍流特性。
The turbulence properties of annular space in a cyclone were investigated by using the Laser Doppler Velocimetry.
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