【作者】 杨帆； 王丽铮； 王家楣； 陈顺怀； 罗亮；

【Author】 YANG Fan;WANG Lizheng;WANG Jiamei;CHEN Shunhuai;LUO Liang;School of Transportation, Wuhan University of Technology;

【机构】 武汉理工大学交通学院；

【摘要】 针对一条货轮的气膜减阻问题,为了方便数值计算与模型试验结果对比,将原船缩小31.98倍作为计算的物理模型,求解三维不可压缩定常湍流以及气液两相流。在对喷气方向和喷气位置相关参数进行数值筛选的基础上数值分析船舶减阻效果,结果显示:在三个喷缝同时喷气的情况下,总阻力比原船减小了19%,其中摩擦阻力减小22%,采用上述筛选结果进行模型试验所获总阻力减阻率为15%,表明数值计算与试验结果吻合较好。更多还原

【Abstract】 Aiming at the drag reduction of a river-sea bulk cargo by gas film, the original ship has been scaled 31.98 times smaller to be the calculation model in order to compare the simulation results with the experimental ones, which turns to solve the incompressible unsteady turbulent flow and the gas-liquid two phase flow. On the basis of numerical filtering of the jetting direction and position, the simulation shows that with three slots jetting simultaneously, the total drag coefficient is reduced by 19% and frictional drag coefficient decreased by 21%, which corresponds to the results of completed towing experiment.更多还原