利用脉冲多普勒技术分析涡流  

Vortex analysis using pulsed Doppler techniques

作　　者：汪源源[1] PeterJFish 

机构地区：[1]复旦大学电子工程系,上海200433 [2]SchoolofElectronicEngineeringScience

出　　处：《声学学报》1998年第3期235-240,共6页Acta Acustica

摘　　要：提出了一种利用脉冲多普勒技术分析涡流的方法。首先用合适的滤波器从估计出的平均频率波形得到涡流的波形，然后计算涡流的经过频率、幅度和最大旋转速度。文中还给出了这种方法对从卡尔曼涡流产生器记录的稳流和脉动流多普勒信号的分析结果。A method was proposed to analyse the vortex using pulsed Doppler techniques. The vortex shffe wavform was first obtained from the estimated mean frequency waveform using a suitable filter.The vortex shedding frequency, amplitude and maximum rotational velocity were then calculated. This method was demonstrated on in vitro Doppler signals recorded from both steady and pulsatile flow using a Karman vortex generator.

关 键 词：脉冲多普勒 波形 幅度 旋转速度 涡流 血管 

分 类 号：O357.1[理学—流体力学] R318.01[理学—力学]