航行姿态对气泡高速艇艇底气穴稳定性的影响  

Influence of trim and heel on stability of air cavity of high speed craft

作　　者：孙小帅[1] 董文才[1] 

机构地区：[1]海军工程大学舰船工程系,武汉430033

出　　处：《海军工程大学学报》2013年第5期31-36,共6页Journal of Naval University of Engineering

基　　金：全国优秀博士学位论文作者专项基金资助项目(200551)

摘　　要：为探索气泡高速艇航行过程中航态变化对艇底气穴形态及其稳定性的影响，基于RANS方程与VOF两相流模型，构建了气泡高速艇艇底气穴形态及粘性流场数值计算模型，研究了纵倾和横倾对艇底气穴形态、面积及尾部气穴逸出的影响规律。数值计算结果表明：艇底气穴沿舷侧和纵向去流方向扩散，饱和气流量状态下气穴面积随航速提高而增加；尾倾角增大对Fv-2．796状态下的气穴面积影响不大，但会引起Fv=1．398及Fv=2．097状态下的气穴面积增加；尾倾4°～6°有利于保持气穴的稳定性；存在一个临界横倾值，当横倾角超过2。后，气穴向吃水较浅的一侧偏移，气穴面积急剧减少。In order to study the influence of high speed craftrs sailing attitude on air cavity shape and stability, a numerical model was established based on RANS equations and VOF multiphase model, to calculate air cavity shape in the bottom hollow and viscous flow field around the high speed air cavity craft and to investigate the influence of trim and heel on air cavity shape, area and caudal air escape. The results which have been obtained are. air cavity in the bottom hollow spreads with the inflow transversely and longitudinally the area of air cavity increases as the speed goes up; the increase in trim degree has little effect on the area of air cavity when Fv is 2. 796, but cause the area of air cavity to expand when Fv is 1. 398 and 2. 097° the trim between 4° and 6° is helpful to the stability of the air cavity ~ there exists a limitation heel degree; when the heel degree is bigger than 2°, air cavity will break greatly and drift to the smaller draft side, thus to decrease the area of air cavity greatly.

关 键 词：气泡高速艇 气穴形态 航行姿态 稳定性 

分 类 号：U631.1[交通运输工程—船舶与海洋工程]