深V型双断级滑行艇水动力特性的初步数值研究  

Preliminary Numerical Study on Hydrodynamic Characteristics of Deep-V Planing Boat with Double Steps

作　　者：姚丁元 蒋一 沈冬祥 倪其军[2] YAO Dingyuan;JIANG Yi;SHEN Dongxiang;NI Qijun(Unit 63983 of the Chinese People's Liberation Amy,Jiangsu Wuxi 214035,China;China Ship Scientific Research Center,Jiangsu Wuxi 214082,China)

机构地区：[1]中国人民解放军63983部队,江苏无锡214035 [2]中国船舶科学研究中心,江苏无锡214082

出　　处：《船舶工程》2020年第10期41-46,共6页Ship Engineering

基　　金：国家自然科学基金(51479181)。

摘　　要：利用模型试验和数值手段对比研究了深V型双断级滑行艇和无断级滑行艇的静水阻力特性。试验结果表明,双断级滑行艇在起滑之后的高速航行阻力及纵向运动稳定性上较无断级模型存在明显优势,在容积弗劳德数为5.21的航速下总阻力降低了19.2%。利用CFD软件CFX能够较好地捕捉到两模型之间的差异,计算结果表明,各断级之后的空穴均随着航速的提升而不断扩张,断级模型总体浸湿面积较无断级模型最大降低了33.4%,并且双断级使得艇底水动高压分布趋于均匀,有利于改善纵向运动稳定性。The model tests and numerical simulations are carried out to compare and investigate the resistance characteristics of double-stepped planning hull and non-stepped planning hull in deep-V type. The experimental results show that the stepped model has advantage in high-speed resistance and longitudinal motion stability;the total resistance is decreased by 19.2% at the Froude number of 5.21. The comparison between calculated and experimental results confirm that the CFD software CFX could capture the diversity caused by steps. It is found that the air cavity behind step extends backwards with increasing speed, as consequence, the maximum reduction of wetted area can be 33.4% for the stepped model;the presence of steps could also improve the longitudinal stability since the high pressure region is divided and distributed more uniformly on hull bottom.

关 键 词：双断级 滑行艇 模型试验 数值计算 阻力 

分 类 号：U661.31[交通运输工程—船舶及航道工程]