湍流入流下泵喷推进器力谱特性研究

师帅康; 黄修长; 饶志强; 华宏星

doi:10.19693/j.issn.1673-3185.02249

湍流入流下泵喷推进器力谱特性研究

doi: 10.19693/j.issn.1673-3185.02249

师帅康^{1, 2,},
黄修长^{1, 2, ,},
饶志强^{1, 2},
华宏星^{1, 2}

1.
上海交通大学振动、冲击、噪声研究所, 上海 200240
2.
上海交通大学机械系统与振动国家重点实验室, 上海 200240

基金项目: 国家自然科学基金资助项目(51875336)

详细信息

作者简介:
师帅康，男，1997年生，博士生。研究方向：泵喷推进器流致振动。E-mail: ShuaiKang_Shi@sjtu.edu.cn

黄修长，男，1983年生，博士，副研究员。研究方向：流致振动、动力学建模与分析。E-mail: xchhuang@sjtu.edu.cn

通信作者:
黄修长

中图分类号: U664.34
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- 被引次数: 0
出版历程
- 收稿日期: 2020-12-31
- 修回日期: 2021-04-02
- 网络出版日期: 2022-02-25
- 刊出日期: 2022-03-02

Study on force spectrum characteristics of a pump-jet under inflow turbulence

SHI Shuaikang^{1, 2
,},
HUANG Xiuchang^{1, 2
, ,},
RAO Zhiqiang^{1, 2},
HUA Hongxing^{1, 2}

1.
Institute of Vibration, Shock and Noise, Shanghai Jiao Tong University, Shanghai 200240, China
2.
State Key Laboratory of Mechanical System and Vibration, Shanghai Jiao Tong University, Shanghai 200240, China

湍流入流下泵喷推进器力谱特性研究由师帅康，等创作，采用知识共享署名4.0国际许可协议进行许可。

摘要

摘要: 目的旨在解决泵喷推进器在湍流入流作用下非定常力谱不明的问题。方法通过湍流生成栅格和频谱合成法相结合的方法，产生具有时间脉动和空间相干结构的湍流，然后将此种方法与模拟相结合，获得泵喷推进器非定常力的宽带谱。结果结果显示，所采用的计算方法能够获得泵喷推进器导管、定子和转子合理的非定常力宽带谱；泵喷推进器非定常力宽带谱由叶频及倍频处“驼峰”、定子叶频及相邻定子数倍轴频处特征线谱组成，随着叠加叶片数量的增加，力谱中的“驼峰”变得更加明显，特征线谱峰值呈周期性变化，并在叶片数为转子数时达到最小；由于前置定子和导管的使用，泵喷推进器非定常力宽带谱的幅值比螺旋桨高，但“驼峰”没有螺旋桨明显。结论所做研究有助于明确由湍流引起的泵喷推进器非定常力特性，可为低噪声泵喷推进器设计提供参考。
- 泵喷推进器 /
- 湍流 /
- 大涡模拟 /
- 宽带谱
Abstract: Objectives This paper aims to clarify the characteristics of the unsteady force spectrum of a pump-jet operating under inflow turbulence. Methods The turbulence grid and Fourier synthesis method are employed to produce inflow turbulence with spatial flow structure and temporal fluctuation, combined with large eddy simulation (LES) to obtain the broadband unsteady force spectrum of the pump-jet. Results The results show that the proposed method can obtain the unsteady force broadband spectrum for the duct, stator and rotor. The unsteady force broadband spectrum of the pump-jet is composed of the ''humps'' around the blade passing frequency and its multiples, the characteristic line spectrum at the stator blade passing frequency and the shaft frequency of the adjacent stator multiples. As the number of blades increases, the ''humps'' become more obvious and the characteristic peaks change periodically and reach the minimum when the number of blades is equal to the number of rotors. Due to the use of the stator and duct, the amplitudes of the unsteady force broadband spectrum of the pump-jet are higher than those of the propeller, but the ''humps'' are not as obvious. Conclusions The results of this paper can be helpful for clarifying the unsteady force characteristics of a pump-jet induced by inflow turbulence, and provide ideas for the vibration and noise reduction of pump-jets.
- pump-jet /
- turbulence /
- large eddy simulation (LES) /
- broadband spectrum

HTML全文

图 1 计算域和边界条件

Figure 1. Computational domain and boundary conditions

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图 2 泵喷推进器计算网格

Figure 2. Grid of pump-jet

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图 3 泵喷推进器非定常力谱

Figure 3. Unsteady force spectrum for pump-jet

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图 4 泵喷推进器单个叶片力谱(原始力谱)及特征峰值变化

Figure 4. Unsteady force spectrum (original spectrum) for single blade and the variation of characteristic peaks for pump-jet

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图 5 泵喷推进器不同叶片数量时的非定常力谱

Figure 5. Unsteady force spectrum of pump-jet under different blade numbers

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图 6 螺旋桨非定常力谱

Figure 6. Unsteady force spectrum of propeller

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图 7 螺旋桨单个叶片力谱(原始力谱)及特征峰值变化

Figure 7. Unsteady force spectrum (original spectrum) for single blade of propeller and the variation of characteristic peaks for original spectrum

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图 8 Q=30 000时螺旋桨和泵喷推进器流场中的涡量对比

Figure 8. Comparison of vorticity in flow field of propeller and pump-jet at Q=30 000

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图 9 泵喷推进器和螺旋桨不同截面的速度分布

Figure 9. Velocity distribution in different sections for pump-jet and propeller

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图 10 3个典型时刻泵喷推进器的瞬态流场和不同叶片推力的时域历程

Figure 10. Instantaneous flow field at three moments and time-domain history of different blade thrust

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表 1 泵喷推进器的几何参数

Table 1. Parameters of pump-jet

转子参数	数值	定子参数	数值
转子数	9	定子数	11
直径/mm	218	定子安装角/(°)	20
毂径比	0.273	叶片剖面	NACA 66
叶片剖面	NACA 66

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