指周期脉动变星处在脉动周期中的相位。
详细分析了尾水管进口截面的压力脉动的幅值和相位，并对尾水管内的流动做了分析。
Amplitude and phase of pressure fluctuation at the inlet of draft tube as well as the inner flow in draft tube are analyzed in detail.
如果驱动压力脉动幅值足够大，到一定的相位差时，脉动燃烧停止工作。
The pulse flame will be blowout at certain phase difference, if the amplitude of the exciting pressure pulsation is great enough.
用相位多普勒颗粒测速仪（PDPA）测量了颗粒的平均与脉动速度，研究了壁面粗糙度对水平后台阶气粒两相流动的影响。
The effect of wall roughness on gas-particle flows in a horizontal backward-facing step is studied using a phase-Doppler particle anemometer (PDPA) by measuring the mean and RMS particle velocities.
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