Design and Optimization of Bionic Janus Blade in Hydraulic Torque Converter for Drag Reduction
Design and Optimization of Bionic Janus Blade in Hydraulic Torque Converter for Drag Reduction作者机构：School of Mechanical Science and Engineering Jilin University Changchun 130022 China Key Laboratory of Bionic Engineering Ministry of Education Jilin University Changchun 130022 China State Key Laboratory of Automotive Simulation and Control Jilin University Changchun 130022 China
出 版 物：《Journal of Bionic Engineering》 (仿生工程学报（英文版）)
年 卷 期：2018年第15卷第1期
页 面：160-172页
核心收录：
学科分类：0710[理学-生物学] 07[理学] 09[农学]
基 金：国家自然科学基金 中国博士后科学基金 Key Scientific and Technological Project of Jilin Province
主 题：hydraulic torque converter bionic blade boundary layer control drag reduction
摘 要：The chief aim of the present work was to achieve drag reduction in stator blades with liquid using boundary layer control. A stator blade of hydraulic torque converter with bionic grooves in suction side and hydrophobic surface in pressure side was designed. The hydrophobic surface was created using anodic oxidation method and irregular A1203 thin films were found on the surface. They formed hierarchical structure consisting of mini porous structures and microscopic pore spaces, resulting in the hydrophobicity. The bionic groove was designed by Computational Fluids Dynamics （CFD） method. Multi-Island Genetic Algorithm （MIGA） was adopted for groove multi-objective optimization. Through optimization, the maximum drag reduction was close to 12% in oil. In addition, the drag reduction calculation was verified by closed channel experiment and ＂Tire Vortex＂ was proposed to explain the drag reduction mechanism. The bionic Janus blade could maintain its initial profile without any additional device, which had lower risk and less cost. The results are encouraging and show great potential to apply in other flow machineries.
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