| 引用本文: | 李福正,黄桥高,潘光,秦登辉.定子预旋角对泵喷推进器敞水脉动特性影响[J].哈尔滨工业大学学报,2022,54(12):46.DOI:10.11918/202106114 |
| LI Fuzheng,HUANG Qiaogao,PAN Guang,QIN Denghui.Effect of stator pre-whirl angles on open-water fluctuation characteristics of pump-jet propulsor[J].Journal of Harbin Institute of Technology,2022,54(12):46.DOI:10.11918/202106114 |
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| 摘要: |
| 为改善某泵喷推进器(简称泵喷)低频压力脉动, 降低泵喷噪声辐射，在原有泵喷基础上分别调整定子进流角、出流角及安装角，并数值分析了前置泵喷一定范围内定子预旋角下的性能。分析表明：推力、扭矩和最高效率都随预旋角增大而增大, 其中安装角影响最大, 出流角次之, 进流角最小; 分析桨叶推力脉动频域结果, 发现单叶片推力脉动受定子影响, 其对应频率主要为BPFs(定子叶频)倍频, 并在1BPFs最大; 而桨叶总推力脉动频率受定子和转子共同影响, 在4BPFr达到最大。通过分析叶片表面压力标准差, 发现桨脉动最强位置为前缘及叶梢附近, 而定子则位于后缘; 进一步分析定子和转子周围监测点压力脉动特性, 得到主要频率信息为1BPFr, 并且在泵喷尾部中高半径处脉动最强。结果表明, 泵喷低频脉动幅度随角度增加而增加, 但角度调整方式对其影响规律在正、负角不同; 此外, 探究了桨叶前缘同一轴向、不同径向位置的相位关系, 出流角和安装角对相位影响较大, 并且相位关系依预旋角正、负分别呈两极化分布。 |
| 关键词: 泵喷推进器 预旋角 安装角 进流角 出流角 压力脉动 相位关系 |
| DOI：10.11918/202106114 |
| 分类号:U661.31;U664.33 |
| 文献标识码:A |
| 基金项目:国家自然科学基金(51979226);中央高校基本科研业务费专项基金(3102019HHZY030019, 3102020HHZY030018) |
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| Effect of stator pre-whirl angles on open-water fluctuation characteristics of pump-jet propulsor |
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Fuzheng LI1,2, Qiaogao HUANG1,2, Guang PAN1,2, Denghui QIN1,2
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1.School of Marine Science and Technology, Northwestern Polytechnical University, Xi'an 710072, China;2.Key Laboratory of Unmanned Underwater Vehicle Technology (Northwestern Polytechnical University), Ministry of Industry and Information Technology, Xi'an 710072, China
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| Abstract: |
| To reduce the low-frequency fluctuation and radiated noise of pump-jet propulsor (PJP), by adjusting the pre-whirl angles including inlet angle, outlet angle, and stagger angle of a given PJP, this paper numerically analyzes the hydrodynamic performances of the PJP with limited range of stator pre-whirl angles. Results showed that the thrust, torque, and peak efficiency all increased with increasing pre-whirl angle, and the stagger angle had the greatest effect, followed by the outlet angle, and the inlet angle was the least. Through analysis of the rotor force fluctuation in frequency domain, it was found that the force fluctuation of single rotor was affected by stator, and the corresponding frequency was stator blade passing frequency (BPFs), with the maximum amplitude at 1BPFs, while the frequency corresponding to the total thrust was jointly affected by rotor and stator, with the maximum at 4BPFr. The standard deviation of surface pressure on blades was analyzed, and the region with the highest fluctuation was near the leading edge and tip of rotor, while that for stator located around trailing edge. Further analysis on pressure fluctuation characteristics of probes around rotor and stator was carried out. The obtained major frequency was 1BPFr, and the most intense pressure fluctuation was observable at medium and high radius of PJP's wake. Overall, the low-frequency pressure fluctuation of PJP was increasing with the increase in pre-whirl angle, yet the influence law of three methods of adjusting pre-whirl angles was different under positive and negative angles. In addition, the phases of probes at same axial position but different radial positions near the leading edge of rotor were studied. Results showed that the effect of outlet angle and stagger angle was more significant, and the phase difference was obviously different according to the sign of pre-whirl angles. |
| Key words: pump-jet propulsor(PJP) pre-whirl angle stagger angle inlet angle outlet angle pressure fluctuation phase |
