CAJ | 학술논문

基于Fluent 6．3软件平台，选用Reynolds时均的Realizable k－ε湍流模型对复杂碟式机架进行三维定常风场作用的数值模拟。应用带圆柱内域分区的多风向角建模方法，建立满足流场充分发展和网格独立解的计算域模型，模拟得到了45组工况的总风载荷、风压分布及绕流特性等结果。分析风载荷随工况的变化规律，并将载荷曲线同抛物雷达天线风洞试验结果进行定性的对比分析，验证了模拟结果的合理性。采用因次方法探讨了聚光器镜面风载荷占机架总风载荷的比值，给出了典型工况聚光器体型系数分布及各分区载荷极值，进一步分析流场绕流特性揭示了载荷产生的机制，所得结论为碟式光热太阳能整机结构抗风设计提供依据。
기우Fluent 6．3연건평태，선용Reynolds시균적Realizable k－ε단류모형대복잡설식궤가진행삼유정상풍장작용적수치모의。응용대원주내역분구적다풍향각건모방법，건립만족류장충분발전화망격독립해적계산역모형，모의득도료45조공황적총풍재하、풍압분포급요류특성등결과。분석풍재하수공황적변화규률，병장재하곡선동포물뢰체천선풍동시험결과진행정성적대비분석，험증료모의결과적합이성。채용인차방법탐토료취광기경면풍재하점궤가총풍재하적비치，급출료전형공황취광기체형계수분포급각분구재하겁치，진일보분석류장요류특성게시료재하산생적궤제，소득결론위설식광열태양능정궤결구항풍설계제공의거。
Based on Fluent 6.3 software,Navier-Stokes equations with Reynolds time average were chosen to simulate 3D steady wind field of a complex dish frame.Computational domain model satisfying unrestraint flow field and grid independent solutions was built by applying the multi-angle wind modeling method with inner domain subareas of a cylinder.45-group results of total wind load,wind pressure distribution and flow around characteristics were acquired with simulations.Varying laws of wind load with different working conditions were analyzed.The reasonableness of simulation results was verified with a qualitative comparative analysis between load curves and parabolic radar antenna wind tunnel test results.The ratio of the condenser mirror load to the total wind load of the frame was explored by adopting the dimensionless method.Condenser shape factor distribution and extremes of each subarea load were acquired under typical working conditions. And the load generating mechanism was revealed with further analysis of the flow around characteristics.The study results provided a basis for wind-resistant design of the whole structure of a photo-thermal solar energy dish.