| 湍流入流下泵喷推进器力谱特性研究 |
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| 引用本文： | 汤王豪, 黄修长, 饶志强, 等. 泵喷定子襟翼作动对转子非定常力抑制方法数值研究[J]. 中国舰船研究, 2023, 18(6): 21–29. doi: 10.19693/j.issn.1673-3185.03229 |
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| 作者姓名： | 汤王豪 黄修长 饶志强 华宏星 |
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| 作者单位： | 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;3.船海特装和动力系统国家工程中心，上海 200240 |
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| 摘 要： | 目的 转子非定常力是泵喷推进器轴系振动的主要激励源，其产生机理和抑制机理受转−定子干扰流动的影响，需研究其抑制方法。 方法在泵喷推进器定子后缘引入襟翼结构，利用襟翼作动产生二次流动，改变转子入流条件，调控转−定子干扰流动，达到抑制转子非定常力的目的。以具有前置定子襟翼的Suboff全附体艇后泵喷推进器为研究对象，采用基于SST k–ω湍流模型的URANS方法和动网格技术建立可实现定子襟翼作动的数值模型。针对转子非定常力转子叶频分量的抑制，给出定子襟翼作动规律的表达式。 结果结果显示，在襟翼作动最优控制下，泵喷的水动力性能变化不超过1%，转子轴向非定常力在转子叶频处下降了83.35%，单个转子叶片轴向非定常力在转子叶频处降低了81.80%；襟翼作动对定子尾迹与转子入流速度的调控是抑制转子非定常力的机理。 结论研究表明，最优控制下的定子襟翼作动能够在保持水动力性能的同时使转子非定常力特征线谱得到显著抑制，可为泵喷推进器的叶频等线谱控制提供一种新的思路。
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| 关 键 词： | 泵喷推进器 非定常力 襟翼作动 转−定子干扰 流动调控 |
| 收稿时间： | 2022-12-23 |
| 修稿时间： | 2023-02-16 |
Study on force spectrum characteristics of a pump-jet under inflow turbulence |
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| TANG W H, HUANG X C, RAO Z Q, et al. Numerical investigation on unsteady force suppression of pump-jet rotor by oscillating stator trailing edge flaps[J]. Chinese Journal of Ship Research, 2023, 18(6): 21–29. doi: 10.19693/j.issn.1673-3185.03229 |
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| Authors: | TANG Wanghao HUANG Xiuchang RAO Zhiqiang HUA Hongxing |
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| Affiliation: | 1.Institute of Vibration, Shock and Noise , Shanghai Jiao Tong University, Shanghai, 200240;2.State Key Laboratory of Mechanical System and Vibration, Shanghai Jiao Tong University, Shanghai, 200240;3.National Engineering Research Center of Special Equipment and Power System for Ship and Marine Engineering, Shanghai, 200240 |
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| Abstract: | ObjectivesThe unsteady force of the rotor is the main excitation source of pump-jet shafting vibration, and rotor-stator interaction has an important impact on the characteristics of the unsteady force. Therefore, the suppression method of pump-jet unsteady force should be studied. MethodsOscillating flaps are introduced onto the trailing edge of the stator. The secondary flow generated by the flaps is used to affect the rotor inflow conditions so as to suppress the unsteady force of the rotor. A numerical model is established on the basis of the unsteady Reynolds-averaged Navier–Stokes equation (URANS) method of the shear stress transport (SST k–ω) turbulence model, and a SUBOFF with full appendages and a pump-jet with stator trailing edge flaps is taken as the research object. Aiming at suppressing the unsteady force amplitude at the rotor blade passing frequency, the oscillating law of the stator flaps is given. ResultsThe results show that under the optimal control of the flaps, the hydrodynamic performance of the pump-jet varies by less than 1%, the axial unsteady force of the rotor decreases by 83.35% at the rotor blade pass frequency (BPF) and that of a single rotor blade decreases by 81.8% at the rotor BPF. Further analysis shows that the oscillating flaps can manipulate the stator wake and velocity on the rotor inlet plane. ConclusionsThe results show that stator trailing edge flaps can significantly suppress the characteristic line spectrum of rotor unsteady force while maintaining hydrodynamic performance, which will shed some light on controlling the BPF line spectra of pump-jets. |
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| Keywords: | pump-jet propulsor unsteady force oscillating stator flaps stator-rotor interaction active flow control |
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