对转喷水推进器前后叶轮能量配比对其性能影响的数值研究

doi:10.19423/j.cnki.31-1561/u.2024.03.003

船舶 ›› 2024, Vol. 35 ›› Issue (03): 30-42.DOI: 10.19423/j.cnki.31-1561/u.2024.03.003

对转喷水推进器前后叶轮能量配比对其性能影响的数值研究

梁宁, 王赟, 冯若凡, 曹琳琳^*, 吴大转

浙江大学能源工程学院杭州 310012

收稿日期:2023-10-31 修回日期:2023-11-29 出版日期:2024-06-25 发布日期:2024-06-24
通讯作者: 曹琳琳（1981-）,女,博士,副研究员。研究方向：舰船技术推进。吴大转（1977-）,男,博士,教授。研究方向：低噪声泵、风机与推进技术。
作者简介:梁宁（1991-）,男,博士研究生,工程师。研究方向：舰船技术推进。王赟（1995-）,男,本科,工程师。研究方向：结构设计与减振降噪。冯若凡（2000-）,男,硕士研究生。研究方向：舰船技术推进。
基金资助:
国家自然科学基金“基于谱分析的推进泵叶片空泡激振源机理及控制研究”（52171326）

Numerical Study on the Effect of Energy Ratio Between the Front and Rear Impellers on the Performance of a Counter-Rotating Waterjet

LIANG Ning, WANG Yun, FENG Ruofan, CAO Linlin^*, WU Dazhuan

College of Energy Engineering, Zhejiang University, Hangzhou 310012, China

Received:2023-10-31 Revised:2023-11-29 Online:2024-06-25 Published:2024-06-24

摘要/Abstract

摘要： 面向新型舰船高效推进系统的研制需求,将对转叶轮形式与喷水推进技术相结合,以更高能量密度的能量转化模型代替传统模式。该文采用计算流体力学的数值模拟方法,对基本参数相似、前后叶轮能量配比不同的2种推进方案开展了定常内流场分析与非定常叶轮干涉特性研究,结果表明：2种能量配比的对转喷水推进器推进效率基本相同,适应航速范围广、高效区宽;前叶轮起到了整流作用,降低了进口流道流场不均匀性对后叶轮的影响;增加后转子负载,减小前叶轮负载的能量配比方式有利于对转喷水推进器非定常性能的提升,推进器叶轮激振力与压力脉动幅值下降明显。

关键词: 喷水推进器, 对转叶轮, 能量配比, 水动力性能, 激振力, 压力脉动

Abstract: Facing the development needs of efficient propulsion systems for new-type ships, the traditional modes have been replaced by the energy conversion mode with a higher energy density by combing the counter-rotating impeller with the waterjet propulsion technology. The steady internal flow field analysis and unsteady impeller interference characteristics are studied for two different propulsion schemes with similar basic parameters and different front and rear impeller energy distribution ratios by using the CFD numerical simulation method. The results show that the propulsion efficiency of the counter-rotating waterjets with two different energy distribution ratios are basically the same, with a wide range of speed and a wide range of high-efficiency. The front impeller plays an adjusting function and reduces the influence of the non-uniformity of the inlet flow field on the rear impeller. The unsteady performance of the counter-rotating waterjet can be improved by increasing the load of the rear rotor and reducing the energy distribution mode of the load of the front impeller, with significant reduction of the impeller exciting force and pressure fluctuation amplitude.

Key words: waterjet, counter-rotating impeller, energy distribution ratio, hydrodynamic performance, exciting force, pressure pulsation

中图分类号:

梁宁, 王赟, 冯若凡, 曹琳琳, 吴大转. 对转喷水推进器前后叶轮能量配比对其性能影响的数值研究[J]. 船舶, 2024, 35(03): 30-42.

LIANG Ning, WANG Yun, FENG Ruofan, CAO Linlin, WU Dazhuan. Numerical Study on the Effect of Energy Ratio Between the Front and Rear Impellers on the Performance of a Counter-Rotating Waterjet[J]. Ship & Boat, 2024, 35(03): 30-42.

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对转喷水推进器前后叶轮能量配比对其性能影响的数值研究

Numerical Study on the Effect of Energy Ratio Between the Front and Rear Impellers on the Performance of a Counter-Rotating Waterjet

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