槽道气垫双体船气水耦合机理及耐波性预报方法研究

项目名称： 槽道气垫双体船气水耦合机理及耐波性预报方法研究

项目编号： No.51509053

项目类型： 青年科学基金项目

立项/批准年度： 2016

项目学科： 其他

项目作者： 郭志群

作者单位： 哈尔滨工程大学

项目金额： 20万元

中文摘要： 槽道气垫双体船是一种气垫船和槽道滑行艇的杂交船型。与气垫排水占大多数的表面效应船不同，槽道气垫双体船的气垫排水量仅占总排水量的30%左右。在摇荡运动中该船型两滑行艇侧体的水动力与中间槽道内气垫的气动力通过内自由面相互影响，称作气水耦合效应。槽道气垫双体船的气水耦合效应比气动力占支配地位的表面效应船强烈，前期研究结果表明在没有考虑气水耦合效应时槽道气垫双体船的耐波性预报精度较低。本项目拟针对某高速槽道气垫双体船，独创性地把现有仅适用于排水型船体的纽曼边值问题的2.5D理论发展成可处理气、水流场的混合边值（包含侧体纽曼边条件和内自由面狄利克雷边条件）问题的2.5D+A理论，用以快速预报高速槽道气垫双体船的耐波性运动，并分析气水耦合机理。在此基础上，开展槽道气垫双体船船模的水池耐波性试验，以对2.5D+A理论的预报结果进行验证。

中文关键词： 槽道气垫双体船；耐波性；气水耦合；2.5D+A理论；波动方程

英文摘要： The channel air cushion supported catamaran (CACSCAT) is a hybrid of air cushion vessel and channel planing catamaran. The air cushion only supports 30% of CACSCAT weight, which is different from surface effect ships (SES) whose air cushion bears most of the ship weight. When CACSCAT makes movements, the hydrodynamics of planing sidehulls and aerodynamics of channel air cushion interfere with each other through the inner free surface, which is called air – water interaction. Actually CACSCAT suffers stronger air – water interaction than SES, of which aerodynamics of air cushion dominates. Previous study suggests that it is hard to precisely predict the seakeeping performance of CACSCAT without consideration of air – water interaction. In this work, in order to solve the seakeeping problem of CACSCAT, the 2.5D theory that only applies to Neumann boundary (rigid displacement hulls) value problems will be innovatively extend to a 2.5D+A theory that could treat mixed boundary (including Neumann boundary conditions of sidehulls and Dirichlet boundary conditions of inner free surface) value problems of air and water flow fields. By using the proposed 2.5D+A method, the seakeeping performance of the high speed CACSCAT could be efficiently predicted, as well as the air – water interaction can be investigated. Moreover, CACSCAT towing tank model experiments are expected to be carried out, for proving the validity of 2.5D+A method.

英文关键词： Channel air cushion supported catamaran (CACSCAT);Seakeeping performance;Air – water interaction;2.5D+A theory;Wave equation