CAJ | 학술논문

针对一优良过渡型艇,为喷气需要进行船底断阶,采用有限体积法、SIMPLEC算法和k-ε两方程湍流模型,不计自由面影响,计及气泡与水的相对运动,数值求解包含气液两相流的雷诺平均控制方程组.获得不同喷缝宽度、不同傅汝德数和相对喷气速度下的船舶的阻力特性和气泡浓度分布规律并与模型实验结果进行对比分析.结果显示:在获得高减阻率条件下,Cn随Fr增加而呈非线性增加,当Fr=0.779时,Cn达到最大值;在获得25%减阻率的条件下,Fr=0.973时相对喷缝宽度为0.112所需喷气量最小即喷气所消耗功率最小.计算结果可为高速气泡船喷缝参数设计提供参考.
침대일우량과도형정,위분기수요진행선저단계,채용유한체적법、SIMPLEC산법화k-ε량방정단류모형,불계자유면영향,계급기포여수적상대운동,수치구해포함기액량상류적뢰낙평균공제방정조.획득불동분봉관도、불동부여덕수화상대분기속도하적선박적조력특성화기포농도분포규률병여모형실험결과진행대비분석.결과현시:재획득고감조솔조건하,Cn수Fr증가이정비선성증가,당Fr=0.779시,Cn체도최대치;재획득25%감조솔적조건하,Fr=0.973시상대분봉관도위0.112소수분기량최소즉분기소소모공솔최소.계산결과가위고속기포선분봉삼수설계제공삼고.
The two-phase flow around a fine transitional with step for injecting air is figured out numerically under the condition of neglecting influences of free-surface.The drag characteristic of the ship and the distribution of the volume fraction of micro bubble are got at different air jet slot size,Fr and relative air injection velocity.The results show that at Cn=25% and Fr=0.973,the air flow rate could reach minimum if non-dimension jet slot size is 0.112.The calculation result will provide reference on the parametric design of air injection slot of High-Speed Air Cavity Craft.