三体船压力跃变的喷水推进推力数值方法  

Numerical method for waterjet thrust of trimaran considering pressure jump

作　　者：张雷 张佳宁 尚宇宸 董国祥 陈伟民 ZHANG Lei;ZHANG Jianing;SHANG Yuchen;DONG Guoxiang;CHEN Weimin(Naval Architecture and Ocean Engineering College,Dalian Maritime University,Dalian 116026,China;Department of Ocean Engineering,Texas A&M University,College Station 77843,USA;State Key Laboratory of Navigation and Safety Technology,Shanghai Ship and Shipping Research Institute,Shanghai 200135,China)

机构地区：[1]大连海事大学船舶与海洋工程学院,辽宁大连116026 [2]德州农工大学海洋工程系,美国德克萨斯州卡城77843 [3]上海船舶运输研究所航运技术与安全国家重点实验室,上海200135

出　　处：《哈尔滨工程大学学报》2019年第9期1582-1588,共7页Journal of Harbin Engineering University

基　　金：国家国际科技合作专项项目(2013DFA80760);中央高校基本科研业务费专项资金项目(3132016339);高技术船舶科研计划项目

摘　　要：为实现喷水推进船舶推力的快速预报,本文提出了一种通过求解兴波阻力、粘性阻力和进流面物理参数实现喷水推进推力快速迭代求解计算的数值方法。本文依据船舶受力的平衡方程,在喷水推进流道内采用压力跃变法,建立船舶喷水推进推力计算数学模型。采用边界元法对兴波势进行求解,通过对船体加长处理,解决兴波阻力计算中流道面元与自由液面面元互相穿透导致的影响系数矩阵异常等数值问题。运用湍流边界层理论计算控制体进流面的速度、压力和进流面边界层影响系数。以三体船船模为研究对象,将数值计算结果与粘流计算流体力学喷水推进自航结果进行对比分析,结果表明:该方法预报三体船喷水推进系统推力相对误差小于5%,能够快速有效预报三体船喷水推进推力性能及推力减额,具有较强的理论研究和工程实际应用价值。To research the rapid prediction method of waterjet thrust,the mathematical model of the waterjet thrust was established by the pressure jump method in the intake duct through the balance equation of hull resistance and waterjet thrust.A new method that comprise three parts for wave-making resistance,viscous resistance and the capture area′s physical quantities was proposed to achieve the waterjet thrust efficiently.The numerical problem caused by the mutual penetration between the duct surface panel and free surface panel was solved by the modification of lengthening the hull reasonably.The capture area′s physical quantities was resolved based on the turbulent boundary layer theory.An comparative study on the computation of waterjet thrust via the present method versus RANS CFD method for a trimaran model was delivered.The result shows that the relative error of waterjet thrust is within 5%,and the present method quickly and effectively predicts the thrust and thrust deduction of trimaran,which has theoretical research and practical application value in engineering.

关 键 词：喷水推进推力 压力跃变 边界元法 边界层理论 三体船 粘流计算流体力学 自航 推力减额 

分 类 号：U661.32[交通运输工程—船舶及航道工程]