自航条件下船泵耦合的喷水推进特性数值分析  

Numerical Analysis of Waterjet Propulsion Characteristics with Pump-Hull Coupling under Self-Propulsion Condition

作　　者：徐锁林 陈红勋[1] 马峥[2] 刘超[1] XU Suolin;CHEN Hongxun;MA Zheng;LIU Chao(Shanghai Key Laboratory of Mechanics in Energy Engineering,Shanghai Institute of Applied Mathematics and Mechanics,School of Mechanics and Engineering Science,Shanghai University,Shanghai 200444,China;China Ship Scientific Research Center,Shanghai 200011,China)

机构地区：[1]上海大学力学与工程科学学院,上海市应用数学和力学研究所,上海市能源工程力学重点实验室,上海200072 [2]中国船舶科学研究中心,上海200011

出　　处：《中国造船》2021年第1期40-49,共10页Shipbuilding of China

基　　金：中国船舶及海洋工程设计研究院喷水推进技术重点实验室基金项目(6142223020302175)。

摘　　要：为了研究喷水推进船航速及运动姿态对推进特性的影响,采用CFD方法,对不同航速和姿态下的一艘喷水推进三体船进行自航计算。研究发现,在不考虑姿态的变化时,随着喷水推进装置转速的提高,航速提高,喷水推进装置导叶通道内贴近吸力面一侧流动分离减轻,推进性能提高。当航速和转速不变,仅改变运动姿态时,随着艏倾的增大,喷水推进装置入口处船底边界层变厚,动量影响系数减小,流道内流动不均匀性改善,而且推力增加;随着船体吃水深度的增加,喷水推进装置性能变化不明显,而当吃水深度过小时会引发空气吸入,性能将严重下降。这项目研究为喷水推进装置的优化设计及其与船体的匹配提供了有益参考。Computational fluid dynamics(CFD)method is applied to study the influence of ship's speed and attitude on water jet propulsion characteristics.Self-propelled calculation of a water jet propelled trimaran at different speed and attitude is carried.With the increase of pump’s rotational speed and ship's speed,flow separation in the vane channel near the suction surface is reduced and efficiency of the propelling pump is improved.When ship’s speed and pump’s rotational speed keep constant,with the increase of the inclination of the bow,boat’s bottom boundary layer at the entrance of the water jet propulsion device thickens,which results in the thrust increase because of the decrease of the momentum influence coefficient and the improvement of the flow uniformity in the flow passage.With the increase of the draft depth,performance of the water jet propulsion device changes implicitly.Air is inhaled and performance of the water jet propulsion reduces severely when the draft of the ship is too low.This study provides a useful reference for the optimal design and match of water jet propulsion device to the hull.

关 键 词：喷水推进装置 航速 姿态 推进性能 数值模拟 

分 类 号：U664.3[交通运输工程—船舶及航道工程]