CAJ | 학술논문

基于均质平衡流理论,利用 Fluent 6.3对水下钝体空化绕流进行数值模拟,研究钝体空泡形态的变化规律,分析钝体的减阻特性。结果表明：空化数较小时,钝体从水绕流发展成空化绕流,随着空化数减小,空泡的无量纲直径和无量纲长度都增大；压差阻力系数减小,摩擦阻力系数减小并趋于0,总阻力系数比水绕流时降低,基本等于压差阻力系数。
기우균질평형류이론,이용 Fluent 6.3대수하둔체공화요류진행수치모의,연구둔체공포형태적변화규률,분석둔체적감조특성。결과표명：공화수교소시,둔체종수요류발전성공화요류,수착공화수감소,공포적무량강직경화무량강장도도증대；압차조력계수감소,마찰조력계수감소병추우0,총조력계수비수요류시강저,기본등우압차조력계수。
The flow around underwater bluff body is simulated based on the homogeneous equilibrium theory using Fluent 6.3.Change laws of bluff body’s cavity shape and drag reduction characteristics of bluff body are studied in this paper.Results show that water flow will develop into cavitation flow around a bluff body when cavitation number is smaller,and dimensionless diameter and dimensionless length of cavity will increase with decreasing of cavitation number.When pressure drag coefficients decrease, frictional drag coefficient will decrease and go to zero.And total resistance coefficient is lower than water flow around,almost equal to pressure drag coefficient.