交叉潮汐透平阵列能量输出的数值研究  

Numerical Study on Power Extractions of Staggered Grid Tidal Turbine Array

作　　者：白光辉[1] 高铁瑜[1] 李国君[1] 

机构地区：[1]西安交通大学热流科学与工程教育部重点实验室,西安710049

出　　处：《西安交通大学学报》2012年第11期35-39,共5页Journal of Xi'an Jiaotong University

摘　　要：为了使交叉潮汐透平阵列得到更好的应用,针对交叉透平阵列的特性对建立在叶素理论(BE)、激盘模型和计算流体动力学(CFD)技术基础上的计算潮汐透平水动力性能和流场的BE+CFD方法做了进一步的完善.通过该方法深入研究了交叉透平阵列结构参数对阵列透平能量输出特性的影响,结果表明:透平阵列最优横向间距为2.5倍透平叶轮直径;透平阵列纵向间距越大,透平的能量输出越高,纵向间距为6倍透平叶轮直径时,4排交叉透平阵列的相对功率系数可达3.74;最优结构参数时,前两排透平的能量输出较相同条件的单机透平提高了11%.据此,提出了一种新的交叉透平阵列布置方式,经过比较发现,新的交叉透平阵列布置方式较原交叉阵列的优势更为显著,从流场周围吸收的能量更多,透平阵列的能量输出更高.To obtain better application of staggered grid tidal current turbine array,the BE＋CFD method which is based on the blade element theory,the actuator disc model and the CFD technology,and can calculate the hydrodynamic characters and the flow field of tidal current turbines was improved for staggered grid turbine array.Using this method,the influence of staggered grid turbine array＇s structural parameters on the power extraction was investigated.The results show that the optimal lateral distance is around 2.5 times the turbine impeller diameter,and the power extraction increases with the longitudinal distance.The relative power coefficient of the four rows system in this study will reach its maximum value of 3.74 when the longitudinal distance is 6d.If the system contains only two rows of turbine,the power extraction of the system with optimal layout can be 11% higher than that of the same number stand-alone turbines.In addition,a new layout of staggered grid turbine array is presented according to the results of the analysis.The comparison shows that the new layout has more obvious advantages than that of the original staggered grid turbine array because it can absorb more energy from the flow field around the turbine and then increase the power extraction of the turbine array.

关 键 词：潮汐能 交叉透平阵列 叶素理论 激盘模型 数值研究 

分 类 号：TV136.1[水利工程—水力学及河流动力学]