摘要
采用欧拉方法的混合两相流模型及标准k-ε湍流模型,对采用控制气泡逸出技术的高速艇进行数值模拟,得到模型在喷气与不喷气状态下航行时的粘性流场,探讨不同控制气泡逸出方法对摩擦阻力减阻效果的影响,以寻求出使气泡在艇底保持及运动稳定性较好的最佳减阻措施。计算结果表明:在艇底加防溅条没有达到预期的减阻效果,优化后的新船型明显提高微气泡的减阻率。
A mixed two-phase flow model of Eulerian method and the standard k-ε turbulence model was adopted to simulate numerically a high-speed craft for air bubbles escaping control technology.The viscous flow of the model with air-jetting and no air injection were obtained,and the effect of frictional resistance reduction in different air bubbles escaping control methods was discussed in order to find the best reduction measure being able to maintain good stability of air bubbles in the bottom of the craft..Numerical results showed that adding bars which can control air bubbles escaping at the bottom of the craft does not achieve the desired drag reduction effect,while the new optimized hull form significantly improve the effect of micro-bubble drag reduction.
出处
《船海工程》
2010年第2期12-17,共6页
Ship & Ocean Engineering
基金
国家863项目(2006AA112223)
关键词
高速艇
微气泡减阻
防溅条
数值计算
high-speed craft
drag reduction
control air bubbles escaping bars
numerical simulation
