侧壁式气垫船峰值减阻数值研究  

Numerical analysis of peak resistance reduction by bubbly layer for surface effect ship

作　　者：杨静雷[1] 杨东梅[1] 李平[1] 林壮[1] YANG Jinglei;YANG Dongmei;LI Ping;LIN Zhuang(College of Shipbuilding Engineering, Harbin Engineering University, Harbin 150001, China)

机构地区：[1]哈尔滨工程大学船舶工程学院,黑龙江哈尔滨150001

出　　处：《哈尔滨工程大学学报》2017年第11期1709-1714,共6页Journal of Harbin Engineering University

基　　金：国家自然科学基金项目(51509055;51509053)

摘　　要：针对侧壁式气垫船在越峰过程中阻力峰值过大的问题,本文基于N-S方程,采用以多面体为核心的体网格形式,计算了其在静水中的阻力值,验证了数值计算在阻力峰值处的精确度。借助气幕减阻思想,利用一层高压高速的均匀气幕来代替传统的艏部气封装置,研究了侧壁式气垫船在气幕下的密封性能。在此基础上,数值计算了侧壁式气垫船在约束型气幕及非约束型气幕下,指端距离基线高度、喷口位置、喷口角度等气幕参数对减阻率的影响。结果表明:气幕参数的变化对减阻率影响较大,减阻率在气流量为180 m3/h时达到峰值,而最高减阻率可达到了35%;艏封采用合理的气幕形式可有效的降低侧壁式气垫船的阻力峰值。To solve the problem of a considerably large peak value surface effect ship(SES)during take off,this study calculates the resistance of a ship in calm water using the polyhedron volume mesh based on N S equations and verifies the accuracy of the resistance peak.Based on the idea of reducing resistance via bubbly layer,a uniform layer comprising a high pressure high speed air film is used to replace the traditional header gas sealing device,and the sealing performance is then calculated.A numerical method simulates the air curtain of the SES for a binding or non binding situation on this basis and analyzes the effect of the air curtain on the resistance reduction rate(including the height from baseline to finger,the nozzle position,and the vent angle).Results show that different air curtain parameters have vastly different effects on the drag reduction rate;the drag reduction rate reaches the peak at a gas flow of180m3/h and the value of the peak is35%.Results show that the header sealing device can effectively reduce the SES resistance peak while using a reasonable bubbly layer.

关 键 词：侧壁式气垫船 数值计算 气幕 减阻率 阻力峰值 气流量 

分 类 号：U661.3[交通运输工程—船舶及航道工程]