摆板式波浪能利用装置的动力特性模拟研究

发布时间：2018-01-09 14:23

本文关键词：摆板式波浪能利用装置的动力特性模拟研究　出处：《山东大学》2014年硕士论文　论文类型：学位论文

更多相关文章： 摆板式 波浪能 Flow3D 数值模拟

【摘要】：目前随着人口增加,能源消耗量的上升,石油、天然气等常规能源的消耗殆尽以及环境污染的日益严重,人们不得不开始关注新的能源形式,这种能源形式的开发利用必须是符合环境友好、经济可行的可再生能源以及可持续发展的理念。波浪能作为取之不尽、用之不竭的清洁、可再生能源之一。对波浪能进行大规模的开发和利用,可以缓解常规能源的短缺问题同时也可以降低温室气体的排放。相信波浪能转换技术将在未来的能源市场中将发挥至关重要的作用。在丰富的可再生能源太阳能、风能、生物质能、波浪能中,就只波浪能一种能源的总功率值就能达2×108kW。而我国在近20kM的海岸线,中也蕴藏着了1599.52×104kW的波浪能。在不同的波浪能利用技术当中,本论文选取摆板式波浪能利用装置进行研究。摆板式波浪能利用装置就是通过摆板与波浪的相互作用,从而使得摆板左右摆动,从而将波浪能转换为摆板的动能,从而达到将波浪能进行利用的效果。通过分析摆板式波浪能利用装置的原理和系统组成,可知摆板式波浪能利用装置的关键技术在于对摆板的动力特性分析。本文通过数值模拟的方法对摆板与波浪的流固耦合进行计算分析。为了能都精确地模拟出摆板在波浪中的动力特性,必须先做出数值水槽,即对波浪运动进行精确的模拟。本文是基于Flow3D建立数值水槽。通过速度入口造波法和变换空间步长消波法,成功构建了二维和三维数值波浪水槽,并模拟得到斯托克斯波。在三维波浪数值水槽中,对密度分别为650kG/m3、700kG/m3、750kG/m3的摆板与波高为0.7m和0.5m的波浪进行数值模拟,分析摆板的动力特性变化。随着摆板密度的增加,摆板角速度减小,摆板运动力矩增加,摆板所捕获的波浪能效率也增大。研究在波浪波高为h=0.5m时,不同宽度摆板波浪相互作用后的动力特性变化。随着摆板宽度的增加,摆板的摆动角度相差不大,而摆板摆动力矩增加。摆板的功率也增加。在不同高度的摆板和波浪相互作用的动力特性研究中,随着摆板高度的增加,摆板的转动角度和角速度都减小。板高为3.5m的摆板捕获波浪能的平均功率达到最大值1.23kW,板高为3.5m时为最佳高度。并且分析了摆板在受到不同弹性系数的情况下所受到的负载力的变化。对摆板捕获波浪能的效率,即摆板所受的波浪能对摆轴做的功与波浪能的比值进行研究。分别得到了摆板在不同密度、板宽下波浪能的转换效率。
[Abstract]:At present, with the increase of population, the increase of energy consumption, the depletion of conventional energy, such as oil, natural gas and environmental pollution, people have to begin to pay attention to new forms of energy. The development and utilization of this form of energy must be in line with the concept of environmentally friendly, economically viable renewable energy and sustainable development. Wave energy as an inexhaustible clean. One of the renewable energy sources. The development and utilization of wave energy on a large scale. It can alleviate the shortage of conventional energy and reduce greenhouse gas emissions. It is believed that wave energy conversion technology will play a crucial role in the future energy market. In the abundant renewable energy such as solar energy, wind energy, biomass energy and wave energy, the total power value of only one kind of energy can reach 2 脳 108 kW. and the coastline of our country is nearly 20 km. There are 1599.52 脳 104kW wave energy in different wave energy utilization technology. In this paper, the swinging plate wave energy utilization device is selected. The swinging plate wavy energy utilization device is through the interaction between the swinging plate and the wave, thus making the swinging plate to the left and right. The wave energy is converted into the kinetic energy of the pendulum plate, and the wave energy is utilized. The principle and system composition of the swinging plate wave energy utilization device are analyzed. It is known that the key technology of the swinging plate wave energy utilization device lies in the analysis of the dynamic characteristics of the pendulum plate. In this paper, the fluid-solid coupling between the swinging plate and the wave is calculated and analyzed by numerical simulation. In order to accurately simulate the dynamic characteristics of the pendulum plate in waves, numerical flume must be made first. In this paper, the numerical flume is established based on Flow3D. The two-dimensional and three-dimensional numerical wave flume is successfully constructed by the velocity inlet wave-making method and the transform space step wave elimination method. The Stokes wave is simulated. In a three dimensional wave numerical flume, numerical simulation is carried out on a pendulum plate with a density of 650 KG / m ~ (3) and a wave with a density of 700kG / m ~ (3) and a wave height of 0.7 m and 0.5 m respectively. With the increase of the plate density, the angular velocity of the plate decreases, the motion moment of the plate increases, and the wave energy efficiency of the plate is increased. The dynamic characteristics of swinging plate with different width are studied when the wave height is 0.5 m. With the increase of swinging width, the swing angle of swinging plate is not different. The wobble moment of swinging plate increases and the power of swinging plate increases. In the study of dynamic characteristics of swinging plate and wave interaction at different heights, with the increase of swinging plate height. The rotation angle and angular velocity of the pendulum plate are decreased, and the average power of the wave energy captured by the pendulum plate with a height of 3.5 m reaches the maximum value of 1.23 kW. The optimum height of the plate is 3.5m, and the load force of the pendulum plate under different elastic coefficients is analyzed. The efficiency of wave energy capture, that is, the ratio of wave energy to wave energy on the pendulum axis, is studied, and the conversion efficiency of wave energy at different density and width is obtained.
【学位授予单位】：山东大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：P743.2

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