船舶气层减阻复杂水气界面数值模拟方法研究  

Numerical Study of Complex Water-Air Interface in Ship Drag Reduction by Air Layer

作　　者：郑巢生 洪方文[1,2] 张晓嵩 ZHENG Chaosheng;HONG Fangwen;ZHANG Xiaosong(China Ship Scientific Research Center,Wuxi 214082,China;National Key Laboratory on Ship Vibration and Noise,Wuxi 214082,China;School of Naval Architecture,Ocean and Civil Engineering,Shanghai Jiao Tong University,Shanghai 200240,China)

机构地区：[1]中国船舶科学研究中心,无锡214082 [2]船舶振动噪声重点实验室,无锡214082 [3]上海交通大学船舶海洋与建筑工程学院,上海200240

出　　处：《中国造船》2022年第3期127-134,共8页Shipbuilding of China

摘　　要：形成稳定的气层是进行气层减阻的重要前提条件。论文以循环水槽内的船模气层减阻试验模型为对象,分别通过准DNS和URANS方法针对船底气层复杂水气界面开展数值模拟研究,考察两种数值模拟方法对宏观气层形态特性捕捉的影响,分析气层水气界面流场特征。计算结果表明,针对给定的工况,与URANS方法相比,准DNS方法模拟的船底气层水气界面形态,特别是通气台阶后无气层覆盖区的预报与试验更为吻合。通过气层内的流场特性对比,分析了流场涡系结构不稳定性对水气界面不稳定性的影响,以及对预报气层形态的影响。In air-layer drag reduction, the formation of stable air-layer is an important prerequisite. An experimental air-layer drag reduction model in LCC is chosen to study the numerical method. Water-air interface of the air-layer under the hull bottom is simulated with quasi-DNS method and URANS method respectively. The simulation results show that, the quasi-DNS can predict air-layer-uncovered region behind ventilation step,which is in better agreement with the experiment, compared with URANS method, and the effects of the flow vortex structure instability on water-air interface instability and the air layer shape are analyzed as well.

关 键 词：气层减阻 水气界面 数值模拟 

分 类 号：U664.3[交通运输工程—船舶及航道工程]