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作 者:田丽梅[1] 梅浩然 李新红 王银慈[1] 杨乐 邵鹏
机构地区:[1]吉林大学工程仿生教育部重点实验室,长春130022 [2]吉林市奥吉通泵业有限责任公司,吉林132016
出 处:《农业机械学报》2015年第4期65-69,119,共6页Transactions of the Chinese Society for Agricultural Machinery
基 金:国家自然科学基金青年科学基金资助项目(51105168);长春市重大科技攻关专项资助项目(13KG33)
摘 要:海豚特殊的皮肤结构具有减阻功能,模仿其结构,设计了一种具有实际工程应用价值的仿生耦合功能表面,将其应用到离心式水泵的叶轮表面,进行水泵增效试验研究。研究结果表明:这种仿生耦合功能表面可提高离心式水泵效率3%及以上;仿生耦合功能表面面层材料的硬度对水泵的效率影响显著。分析认为其增效机制主要在于:表面面层材料与基底材料仿生结构的耦合变形降低了叶轮流道壁面的摩擦力及吸收流体介质对叶轮进、出口湍动能的方式实现对流体介质的控制,从而降低离心泵水力损失,实现增效。Dolphin's special skin structure has characteristics of drag reduction, by mimicking this structure, a kind of bionic coupling functional surface which has practical engineering application value was designed. It was applied on the surface of a centrifugal pump impeller to investigate the efficiency enhancement of the pump through contrast experimental method. The experimental results showed that the pump efficiency was improved by 3% by using this kind of bionic coupling functional surface. The hardness of surface material had influence on the pump efficiency. The mechanism of efficiency enhancement of bionic coupling functional surface was the coupling deformation between elastic surface material and bionic structure on the basal material, which can decrease the drag of impeller surface, absorb some energy and effectively reduce the turbulent kinetic energy of the inlet and outlet of impeller, thus, the hydraulic loss would be decreased.
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