摘要
提出了一种能够利用波浪能发电的装置,其吸收海水能量的主要构件是卧式水轮机.为了研究卧式水轮机的水动力学性能,采用有限体积法,并利用非定常SST k-ω湍流模型和滑移网格技术,对其进行了三维数值模拟与实验研究,分析了在六种不同叶片展长下叶轮的水动力学特性.通过将数值计算结果和实验结果进行比较,验证了SST k-ω湍流模型和滑移网格技术的可行性.结果发现:叶片展长递增对水轮机叶片的合力系数几乎没有影响,但是对轮机转矩系数和叶轮能量利用率影响很大;在低尖速比时,叶片展长对水轮效率影响不大,当尖速比大于2.5时,叶片展长对水轮效率的影响明显加大;叶片展长越长,叶片切向力越大,水轮机对水能的吸收能力越强.
A device transferring wave energy to power was proposed. Its main component was horizontal hydro turbine. The unsteady SST k-ω turbulence model and sliding mesh technique were employed to study the hydrodynamic performance of the horizontal hydro turbine. The dynamic characteristics and surface pressure of the blade of six different lengths were analyzed. The feasibility of k-ω turbulence model and sliding technique were verified by the comparison between the numerical simulation and test results. It was found that with the increasing of blade length, there was no impact on the force coefficient of the turbine blade. But it had a great influence on the torque coefficient and energy utilization ratio of the blade. At low speed ratio, the blade length had little impact on the efficiency of the hydro turbine. When the speed ratio was above 2.5, greater influence of blade length on the hydro turbine was observed. The bigger the blade length, the greater the tangential force was. The adsorption ability of the hydro turbine was stronger.
出处
《能源研究与信息》
2017年第1期55-61,共7页
Energy Research and Information
基金
国家海洋局可再生能源专项(SHME2013JS01)
上海市优秀学科带头人计划(B类)资助项目(14XD1424300)
上海交通大学海洋工程国家重点实验室基金项目(1303)
上海海洋大学科技发展专项基金项目(1416)
关键词
滑移网格
叶片展长
水轮机
能量利用率
sliding mesh
blade length
hydro turbine
energy utilization ratio
