"4.1压力脉动时域分析 选取叶轮旋转第九圈内压力脉动进行分析。如图" ~ 중 영어 번역
【 중국어 】
4.1压力脉动时域分析
选取叶轮旋转第九圈内压力脉动进行分析。如图10(a)、10(b)、10(c)、10(d)、10(e)、10(f)分别代表叶轮出口、第一断面、第四断面、第六断面、出口断面和蜗壳外侧各监测点的压力脉动时域图。其中β为旋转一周内经过的角度。不同断面上的监测点压力幅值都随时间呈周期性变化，从第一断面到蜗壳出口断面压力脉动幅值整体成下降明显。其中靠近叶轮和蜗壳交界面的各监测点（即W1，W7，W10，W13）上压力脉动幅值相差最大，与之相反在距离交界面最远的各监测点上压力脉动幅值相差最小。即压力脉动的幅值在径向方向逐渐减小，并且远离交界面的监测点上压力整体大于靠近交界面处
【 영어 】
4.1 Time Domain Analysis of Pressure Fluctuation
The pressure fluctuation in the Ninth Circle of impeller rotation is analyzed. Fig. 10 (a), 10 (b), 10 (c), 10 (d), 10 (e) and 10 (f) represent pressure fluctuation time domain diagrams of impeller outlet, first section, fourth section, sixth section, outlet section and outer monitoring points of volute, respectively. Among them, beta is the angle through which the rotation takes place within a week. The pressure amplitude of monitoring points on different sections varies periodically with time, and the pressure fluctuation amplitude from the first section to the volute outlet section decreases obviously as a whole. Among them, the pressure fluctuation amplitudes at the monitoring points near the interface of impeller and volute (i.e. W1, W7, W10, W13) differ the most, while the pressure fluctuation amplitudes at the monitoring points farthest from the interface are the least. That is to say, the amplitude of pressure fluctuation decreases gradually in the radial direction, and the pressure at the monitoring point far from the interface is larger than that near the interface.