折线型悬浮导流罩的水动力设计  

Hydrodynamic design of suspending duct with fold line shape

作　　者：陈正寿[1,2] 赵陈[1] 刘羽[1] 赵春慧[1] 王莉萍[3] 

机构地区：[1]浙江海洋学院船舶与海洋工程学院,浙江舟山316022 [2]浙江欧华造船股份有限公司,浙江舟山316101 [3]中国海洋大学数学科学学院,山东青岛266100

出　　处：《水利水电科技进展》2015年第4期49-54,共6页Advances in Science and Technology of Water Resources

基　　金：国家自然科学基金(41476078);浙江省公益技术应用研究计划(2015C34013);舟山科技计划(2014C41003)

摘　　要：为提高一种可根据海流方向做自适应调整的轴流悬浮式潮流能水轮机结构的运行效率,设计了对水轮机外围加装带外包络的三段式导流罩结构,采用数值仿真方法对该导流罩结构进行水动力性能分析,并结合模型试验进行验证。数值仿真结果表明,收缩段和扩散段都为15°攻角的折线型导流罩的水动力性能良好,带导流罩比未带导流罩在相同工况下水轮机输出功率提高30%左右;模型试验得到与数值模拟相近流场数据,证明该导流罩结构收缩段和扩散段的形状阻力相对较小,直线段流速稳定,导流聚能效果明显,为与该水轮机结构相匹配的最佳三段式折线型导流罩结构。In order to improve the operating efficiency of a suspending type axial-flow tidal current turbine, which can be self-adaptive according to the direction of ocean current, a three-section duct with outer envelope has been installed around the turbine. The hydrodynamic performances of this duct have been analyzed with numerical simulation method and the results have been verified by model tests. It has been found that the duct with fold line shape, where the attacked angle of constringent section and proliferation section is 15o, has excellent hydrodynamic performances and the power output of turbine with duct is approximately 30% more than that without duct under the same condition. Besides, the similar flow field data have been obtained from model tests. That is, the form resistance of constringent and dirergent sections is relatively small, so the enegy conversion effect is obvious for steady flow velocity in straight-line section. Therefore, the duct with fold line shape best matches this turbine scheme.

关 键 词：导流罩 水轮机 潮流能 折线型 水动力分析 

分 类 号：TV136.1[水利工程—水力学及河流动力学] P743.3[天文地球—海洋科学]