CAJ | 학술논문

针对水平轴潮流能水轮机，对其进行了力学分析并运用CFD方法对其水动力性能进行了仿真计算。比较了定常计算与非定常计算结果的区别，运用定常计算（MRF）方法得到了表现水轮机性能的功率、扭矩和推力特性曲线，分析了水轮机在不同尖速比时的表现。对水轮机模型进行了拖曳水池试验，并与仿真数据进行了比对分析，两者吻合度较好，并分析了试验过程中出现的在尖速比较大时功率系数衰减的现象，表明CFD方法对水轮机的工程实践有着指导意义。得到了尾流场的速度云图、流线分布图与衰减曲线，结果表明相对于水轮机的直径，受到其影响后的流场存在扩张现象。分析了水轮机后不同位置处的流场衰减情况，结果显示，随着水轮机后轴向距离的不同其速度恢复差别很大，对于今后潮流能水轮机的大规模布置方式研究提供了依据。
침대수평축조류능수륜궤，대기진행료역학분석병운용CFD방법대기수동력성능진행료방진계산。비교료정상계산여비정상계산결과적구별，운용정상계산（MRF）방법득도료표현수륜궤성능적공솔、뉴구화추력특성곡선，분석료수륜궤재불동첨속비시적표현。대수륜궤모형진행료타예수지시험，병여방진수거진행료비대분석，량자문합도교호，병분석료시험과정중출현적재첨속비교대시공솔계수쇠감적현상，표명CFD방법대수륜궤적공정실천유착지도의의。득도료미류장적속도운도、류선분포도여쇠감곡선，결과표명상대우수륜궤적직경，수도기영향후적류장존재확장현상。분석료수륜궤후불동위치처적류장쇠감정황，결과현시，수착수륜궤후축향거리적불동기속도회복차별흔대，대우금후조류능수륜궤적대규모포치방식연구제공료의거。
Aimed at the horizontal axis tidal current turbine, this paper conducts mechanical analysis and simulated calculation on its hydrodynamic performance using the CFD method. The steady and unsteady computing results are compared, and the power, torque and thrust characteristic curve of the turbine performance is obtained with the MRF method. The performance of the turbine at different tip speed ratios is also analyzed. An experiment was carried out that dragged the turbine in a pool, before comparing with the simulated data, proving good fitting of each other. The damping of power coefficient under high tip speed ratio during the experiment process is analyzed, indicating that the CFD simulation on the turbine can guide the engineering practice. The velocity image, streamline and damping curve of the wake are obtained, which shows that the region of wake influenced by turbine is larger compared with the turbine's diameter. The damping circumstances of different locations behind the turbine are analyzed and the results show that considerable difference exists in the velocity recovery with different axial distances behind the turbine. The method presented in this paper can provide a basis for studying the arrangement method of large-scale tidal current turbines.