探索Magnus效应风力机的气动性能,从二维翼型-旋转圆柱绕流到建立三维叶轮模型,通过数值模拟方法来进一步了解其气动性能,为之后Magnus效应风力机设计提供参考.

By analyzing the status,trends and characteristics of the wave power,a Permanent-Magnet Linear Generator based on the spring oscillator as a linear promoter was proposed.Through simplifying the structure of the device and building a mathematical model,several differential equations are built based on the linear wave theory,which portray the relationship between the force of waves and time.Using Laplace transform and inverse transform,the relationship of the relative displacement of the linear promoter and the stator changing over time is gained,and then the generating power of the device can be calculated.Selecting a set of parameters on certain condition,took a simulation experiment with the software MATLAB,and then draw a displacement-time graph and P-c-k relation curves.The result indicates that the power of this device can reach 78.6 W in the designed parameters.

Currently,a dam is usually constructed to raise water level,the potential energy of which transforms into electricity,in the issue of water energy utilization.Only the potential energy of water is utilized,and the form of utilization is single.However,the movement of waves can be divided into horizontal and vertical directions,which correspond to two different forms of energy.According to the feature of wave motion,a new wave energy generation device is designed after the investigation and analysis about the motion.This device based on the linear generator can capture two different forms of wave energy.This paper presents specific structure and working principle of this device in detail.The wave energy generation device utilize the energy of wave movement both in the horizontal and vertical directions,which achieved by pushing the baffle and driving the floats in horizontal direction and vibrating up and down in vertical direction.Then mechanical energy of floats and baffle drive the relative motion of the coil and magnet in linear generator to produce electricity through an energy transfer device.Finally,the device achieves full utilization of wave energy along the riverside.