船体与喷水推进器相互作用机理及其尺度效应研究

项目名称： 船体与喷水推进器相互作用机理及其尺度效应研究

项目编号： No.51209212

项目类型： 青年科学基金项目

立项/批准年度： 2013

项目学科： 水利科学与海洋工程学科

项目作者： 刘承江

作者单位： 中国人民解放军海军工程大学

项目金额： 25万元

中文摘要： 喷水推进器装船后其内外流场与船体外流场的相互作用既改变了喷水推进器的推力和功率特性，又改变了船体的阻力特性,有时还会引起船体阻力的减小。因喷水推进器集成于船体内部，故喷水推进器与船体相互作用机理较螺旋桨船更为复杂。本项目拟采用计算流体力学方法分别数值求解模型尺度和实尺度下喷水推进器分系统、裸船体分系统和"喷水推进器+船体"系统三维粘性流场，以研究各分系统特性和两者相互作用机理及其对推力、功率特性和阻力特性等的影响。为验证计算结果的可信性，进行验证与校核分析，并采用船模阻力试验、自航试验及相关试航数据进行校验。主要研究：（1）船体尺寸、船型、姿态、航速、自由液面等船体因素对喷水推进器伴流及推力、功率等性能的影响；（2）喷水推进器进水口吸水、喷口射流等对船体流场、姿态及阻力等的影响；（3）推力减额等关键因子的影响因素及其大小随航速、船体姿态、船型等因素的变化规律；（4）相互作用机理的尺度效应。

中文关键词： 船舶；喷水推进；相互作用；尺度效应；计算流体力学

英文摘要： Considering a waterjet system in a hull, the interaction between the hull system and the waterjet system will change the thrust performance and the power performance of the waterjet, as well as the resistance performance of the hull, sometimes hull resistance to be decreased. Mechanism of hull-waterjet interaction is more complicated than that of hull-propeller system, because of the tight integration of waterjet and hull. The project is to simulate the complicated three-dimensional viscous flow field of waterjet subsystem, hull subsystem and waterjet-hull system both in model scale and full scale numerically by computational fluid dynamics method in order to study performance of each constituent subsystem and mechanism of interaction, as well as the effects on thrust performance and power performance of waterjet and resistance performance of hull. To validate the creditability of computational results, verification and validation analysis are conducted. Also data from bare model hull resistance measurements, self-propulsion tests and other tests are used to validate the results. Contents of this research are: (1) effects of size, type, pose, speed, free surface of hull on inflow pattern and thrust performance and power performance of waterjet; (2) effects of suction flow of intake, nozzle jet of waterjet on flo

英文关键词： ship；waterjet propulsion；interaction；scale effect；computational fluid dynamics