【摘要】 为了探究高压循环泵的内部流动特性,采用压力脉动传感器采集进口和出口处的压力脉动数据,选取0.5Q_d,0.65 Q_d,0.8 Q_d,1.0 Q_d（Q_d为设计点流量）工况下数据进行了时域、频域和循环平稳三方面分析。研究结果表明:出口处的压力脉动波动情况大于进口处,随着流量的增加,进口处的压力脉动有效值逐渐减小,出口处压力脉动有效值呈现出先减小后略微上升的趋势。出口处的压力脉动主要特征频率为转频(f_RF)和叶通频;进口处的压力脉动特征频率随着流量的增大,其主频由转频先向低频区移动,在设计流量下主频变为转频。小流量进口处压力脉动主要是低频调制现象,出口为叶频调制,随着流量的增大,压力脉动主要受轴频及其谐频、叶通频以及5.2 f_RF的频率调制,进口处和出口处压力脉动的循环平稳分析结果相近。更多还原

【Abstract】 In order to explore the internal flow characteristics of the high-pressure circulating pump, pressure pulsation sensors are used to collect the pressure pulsation data at the inlet and outlet, and 0.5 Q_d, 0.65 Q_d, 0.8 Q_d, 1.0 Q_d（ Q_d is the design point flow） are selected for time domain, frequency domain and cyclostationary three-dimensional analysis. The results show that the pressure fluctuation at the outlet is greater than that at the inlet. As the flow increases, the effective value of the pressure pulsation at the inlet gradually decreases, and the effective value of the pressure pulsation at the outlet shows a trend of first decreasing and then slightly increasing; The rotation frequency( f_RF) and blade pass frequency are the main feature frequency of the pressure pulsation. As the flow rate increases, the main frequency of the pressure pulsation feature frequency at the inlet moves from the rotation frequency to the low frequency area, and the main frequency becomes the rotation frequency under the design flow. The pressure pulsation at the inlet of small flow is mainly low-frequency modulation, while the outlet is blade frequency modulation. With the increase of flow, the pressure pulsation is mainly modulated by the shaft frequency, its harmonic frequency, the blade pass frequency and 5.2 f_RF,the cyclostationary analysis of pressure pulsation at the inlet and outlet shows similar results.更多还原