高效微风发电装置的数值模拟与风洞试验  

The Numerical Simulation and Wind Tunnel Test of an Efficient Breeze Generator

作　　者：关玉明[1] 李祥利 苗艺男 韩晓耀 GUAN Yu-ming;LI Xiang-li;MIAO Yi-nan;HAN Xiao-yao(School of Mechanical Engineering,Hebei University of Technology,Tianjin 300130,China)

机构地区：[1]河北工业大学机械工程学院,天津300130

出　　处：《机械设计与制造》2022年第4期126-130,共5页Machinery Design & Manufacture

摘　　要：针对目前传统的风电技术至少需要3m/s的风速才能用于发电,对于3m/s以下的低速风能造成能源的极大浪费,且发电效率低的情况,介绍了一种高效微风发电装置。首先,设计了高效微风发电装置的结构,利用文丘里效应实现了风速的提高,万向迎风结构增加了风向多变环境的适应能力。其次,应用Fluent软件求解三维定常不可压RNG k-ε湍流模型,基于Simple算法,对微风发电装置在4种不同来流风速下的流场特性进行数值模拟,得到了微风发电装置流场的速度、压力分布,并确定了喉管处速度增益。最后,利用风洞对微风发电装置进行了试验测试,将所得数据与数值模拟结果进行对比分析,结果表明:风洞试验结果与数值模拟结果基本一致,喉管速度增益均约1.4,验证了高效微风发电装置能够有效提高风速,提高发电功率。Considering the fact that the current wind power technology needs at least3m/s wind speed for power generation and the low-speed wind energy which below 3m/s with low power generation efficiency causes huge waste of energy resource,an efficient breeze generator was introduced.Firstly,the structure of breeze generator was designed.The Venturi effect is used to improve the wind speed,and the universal upwind structure is used to increase the adaptability to the variable wind direction.Secondly,the three-dimensional steady incompressible RNG k-ε turbulence model is solved by using Fluent software.Simple algorithm is used to simulate the flow field characteristics of the breeze generator under four different incoming wind speeds.The velocity and pressure distributions of the flow field are obtained,and the velocity gain at the throat is determined.Finally,the wind tunnel is used to test the breeze generator,and the data obtained are compared with the data from numerical simulation.The results show that the wind tunnel test results are basically consistent with the numerical simulation results.The throat speed gain is about 1.4.It is verified that the breeze generator can effectively improve the wind speed and power generation rate.

关 键 词：高效 微风发电 文丘里效应 流体 数值模拟 风洞试验 

分 类 号：TH16[机械工程—机械制造及自动化] TK83[动力工程及工程热物理—流体机械及工程]