摘要
为研究泵喷推进器的艇后推进特性及导管主要参数对推进特性的影响,给出基于推进效率和推进器功率的导管主要参数选择范围,该文通过改进的延迟脱体涡模拟(improved delayed detached eddy simulation,IDDES)方法求解艇后泵喷推进器在不同航速、转速和导管主要参数下的流场,研究了不同航速和不同导管主要参数下的泵喷推进性能和自航因子,其中导管主要参数包括倾角、轴向长度、最大厚度、进口直径和出口直径。结果显示:除导管最大厚度外,导管的倾角、轴向长度、进出口直径对自航因子及推进器功率有较明显影响,倾角和出口直径的变化会显著改变推进器流量,进而影响功率和推进效率。结论表明:选择艇用泵喷推进器导管主要参数时,除了取值要在合理范围,倾角和出口直径还要根据艇体尾段的线型和角度来优化取最佳值。
This article focuses on the propulsion characteristics of the pump-jet propulsor(PJP)behind the hull and the influence of the main dimensions of the duct.The flow fields of the PJP behind the hull under different ship speeds,rotational velocities and main dimensions of the duct are solved by the Improved Delayed Detached Eddy Simulation(IDDES)method to provide the selection ranges of the main dimensions of the duct based on the propulsion efficiency and the propulsor power.It investigates the propulsion performance of the PJP and the self-propulsion factors under different ship speeds and main dimensions of the duct including the inclination angle,axial length,maximum thickness,inlet diameter,and outlet diameter.The results show that except for the duct maximum thickness,the inclination angle,axial length,inlet diameter,and outlet diameter of the duct have significant impacts on the self-propulsion factors and the power.The variation of the inclination angle and the outlet diameter significantly change the flow rate of the propulsor,thereby affecting the propulsion efficiency and the power.It indicates that when determining the main parameters of the duct of the PJP for a submarine,except for proper selection of the values within reasonable ranges,the inclination angle and outlet diameter should also be optimized based on the shape and angle of the hull stern.
作者
李晗
黄桥高
潘光
李福正
何幸
LI Han;HUANG Qiaogao;PAN Guang;LI Fuzheng;HE Xing(School of Marine Science and Technology,Northwestern Polytechnical University,Xi’an 710072,China;Key Laboratory of Unmanned Underwater Vehicle,Northwestern Polytechnical University,Xi’an 710129,China)
出处
《船舶》
2023年第6期73-84,共12页
Ship & Boat
基金
国家自然科学基金资助项目(51979226)。
关键词
泵喷推进器
数值模拟
水动力
自航因子
pump-jet propulsor
numerical simulation
hydrodynamics
self-propulsion factor
