仿生叶轮机构水上推进特性仿真与试验  

Simulation and experimental study on the water propulsion properties of a bionic impeller mechanism

作　　者：郭劭琰[1] 吕建刚[1] 高飞[1] 张仲志 

机构地区：[1]军械工程学院,石家庄050003

出　　处：《工程科学学报》2016年第11期1636-1642,共7页Chinese Journal of Engineering

摘　　要：对一种水上仿生推进装置进行流体力学仿真,并根据处于多种工况下若干组仿真数据,对该推进装置的力学特性进行分析.着重研究并归纳在不同转速和出水高度条件下,推进装置的升力、推力和功率曲线的变化规律,总结有助于仿生推进装置设计与优化的结论.最后,借助叶轮机构试验系统进行相关试验,并用试验数据来印证分析结论的合理性.结果表明,随着转速的提高,推进装置所产生的升力和推力同时增加,机械总效率和推进效率增大,但托举效率减小;当推进装置的轴心距水面越高时,在一定范围内,其推进效率和托举效率越大.合理的结构设计能够大幅提升装置在各种工况下的推进效率和托举效率.Hydrodynamic simulations were performed on a bionic water propulsion unit, and the mechanical properties of the propulsion unit were analyzed according to several simulation data under different conditions. This study was focused on the change laws of the lift, thrust and power curves of the propulsion unit at different speeds and altitude conditions, and several conclusions were summarized which would be helpful to design and optimize the bionic propulsion unit. Finally, relevant tests were done by means of an impeller mechanism test system, and the rationality of these conclusions was confirmed through test data. The results show that with increasing speed, the lift and thrust generated by the propulsion unit increase, the machinery efficiency and propulsion efficiency improve, but the lift efficiency decreases. The longer the distance between the axis of the propulsion unit and the water surface, within a certain range the greater the propulsion efficiency and lift efficiency are. Reasonable structure design can significantly improve the propulsion efficiency and lifts efficiency.

关 键 词：叶轮 仿生学 推进 流体力学 仿真 

分 类 号：TH136[机械工程—机械制造及自动化]