Parametric analysis and optimization of a simple wind turbine in high speed railway tunnels
Parametric analysis and optimization of a simple wind turbine in high speed railway tunnels
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DOI：
10.1016/j.renene.2020.07.099
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发表时间：
2020-12
期刊：
影响因子：
8.7
通讯作者：
Zi-jian Guo;Tang-hong Liu;Kai Xu;Junyan Wang;Wen-hui Li;Zhengwei Chen
中科院分区：
文献类型：
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作者：
Zi-jian Guo;Tang-hong Liu;Kai Xu;Junyan Wang;Wen-hui Li;Zhengwei Chen
从火车通过隧道时产生的滑流中收集风能是一种生产可再生能源的新方法。从计算流体动力学(CFD)的角度，采用三维非定常雷诺平均Navier-Stokes(URANS)模型，研究了不同设计参数的风力机在列车通过隧道的全过程中的能量收集性能。叶片偏置距离越大，风洞内风力机的功率效率越高。当重叠距离为0时，重叠距离的功率效率最大，负扭角涡轮的性能要好于正扭角涡轮。最优风力机在列车以350千米/小时通过时可产生高达157.9千瓦的功率。考虑到中国的隧道分布，通过这种方式每天将回收4.8亿瓦的能量，足以为铁路照明提供应急电力。还能有效缓解铁路隧道日常照明用电压力。
The harvesting of wind energy from the slipstream generated when a train passes through a tunnel is a new way to produce renewable energy. From the perspective of CFD (Computed fluid dynamics), a three-dimensional URANS (unsteady Reynolds-averaged Navier–Stokes) model was used to study the energy harvesting performance of wind turbines with different design parameters inside the tunnel during the entire process of a train passing through a tunnel. A higher value of offset distance of blades could promote the power efficiency of the wind turbine inside the wind tunnel. The maximum power efficiency with regard to overlap distance was found when an overlap distance is 0 m. The turbine with a negative twist angle yielded a better performance than the turbine with a positive twist angle. The optimal wind turbine can generate up to 157.9 W power when a train passes at 350 km/h. Given the tunnel distribution in China, 4.8 × 1012J energy will be recovered each day by this way, which is sufficient to supply the emergency power for railway lighting. It can also effectively ease the pressure of daily lighting power in railway tunnels.