摘要
国内微水头河流水力资源丰富且可利用,是优化能源结构和缓解环境问题的有效途径,但存在发电能量密度低、单机发电规模较小以及布置方式有待优化等问题。以加装导流罩的微水头水轮机为研究对象,通过数值模拟分析了不同间距方案下串列、并列与交错3种阵列化布置方式的机群水力性能。结果表明:串列布置时水力性能不佳;并列时合适间距下具有性能增益效果;正梯形或倒梯形交错布置时,对双排五机组机群的流场特性以及水力性能的影响可以忽略。机组间横向间距取2.5倍导流罩入口段直径、纵向间距取3倍导流罩长度时为多机组相对最佳的间距排布方案,此时机群的捕能效果最好,布置相对紧凑,可充分利用水能。研究成果可为微水头水力资源的开发利用提供参考。
Micro-head river hydropower resource in China is abundant and accessible,playing a vital role in optimizing energy structures and reducing environmental impacts.However,micro-head water turbines face challenges such as low energy density,limited single-unit capacity,and suboptimal layout design.This study investigated a micro-head water turbine system equipped with flow deflectors.Through numerical simulations,we analyzed the hydraulic performance of turbine arrays under three configurations(series,parallel,and staggered arrangements)with varying spacing schemes to improve resource utilization efficiency.The key findings were as follows:series arrangements exhibited suboptimal hydraulic performance,parallel configurations showed performance improvements at optimal spacing,staggered layouts(standard/inverted trapezoids)had minimal effects on flow characteristics in 2-row,5-turbine systems.For multi-unit staggered deployment,an optimal spacing was identified:a horizontal spacing of 2.5 times the deflector inlet diameter and a vertical spacing of 3 times the deflector length.This configuration maximizes energy harvesting efficiency while maintaining compactness for effective river flow energy extraction.The results provide critical design guidelines for micro-head hydropower development.
作者
邹淑云
余富强
周孝亮
肖千豪
刘忠
ZOU Shuyun;YU Fuqiang;ZHOU Xiaoliang;XIAO Qianhao;LIU Zhong(School of Energy and Power Engineering,Changsha University of Science and Technology,Changsha 410114,China)
出处
《人民长江》
北大核心
2025年第7期168-173,共6页
Yangtze River
基金
湖南省自然科学基金项目(2024JJ39176)。
关键词
微水头水轮机
水力性能
数值模拟
导流罩
尾流
阵列化
micro-head water turbine
hydraulic performance
numerical simulation
flow deflector
tailwater flow
array arrangement
