• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Energy Conversion & Management >Effects of in-line configuration of drag-type hydrokinetic rotors on inter- rotor flow pattern and rotor performance
【24h】

Effects of in-line configuration of drag-type hydrokinetic rotors on inter- rotor flow pattern and rotor performance

机译：阻力型流体动力学转子的直列配置对转子间流型和转子性能的影响

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

For an in-line arrangement of two drag-type hydrokinetic rotors, flow patterns between the two rotors and the rotor performance were investigated. The flows were measured using time-resolved particle image velocimetry (TR-PIV) technique. Computational fluid dynamics (CFD) technique was used to quantify the rotor performance. Emphasis was placed upon the influence of the rotor angle and the inter-rotor distance. The results show that two large-scale vortices dominate the wake of the upstream rotor. Expanding, shrinking and shifting of the large-scale vortices significantly influence the rotor performance. Three distinct regions, velocity-rising, velocity declining and velocity-recovery regions, are defined. They serve as indicators of the impact of the downstream rotor on the upstream rotor. Instantaneous wake flow patterns between the two rotors alter with the orientation of the two rotors. The most adverse effect on the upstream rotor arises as the upstream rotor area that faces the incident flow reaches its maximum. At high upstream velocity, both the torque output and the power coefficient of the upstream rotor approach their counterparts associated with the single rotor. With increasing inter-rotor distance, the negative impact of the downstream rotor on the upstream rotor decays continuously. An inter-rotor distance larger than five times the rotor diameter is suggested.
机译：对于两个阻力型流体动力学转子的串联布置，研究了两个转子之间的流型和转子性能。使用时间分辨粒子图像测速（TR-PIV）技术测量流量。计算流体动力学（CFD）技术用于量化转子性能。重点放在转子角度和转子间距离的影响上。结果表明，两个大型旋涡主导了上游转子的尾流。大型旋涡的膨胀，收缩和移动会显着影响转子性能。定义了三个不同的区域，即速度上升区域，速度下降区域和速度恢复区域。它们用作下游转子对上游转子的影响的指标。两个转子之间的瞬时尾流模式随两个转子的方向而变化。当面对入射流的上游转子面积达到最大时，会对上游转子产生最不利的影响。在较高的上游速度下，上游转子的扭矩输出和功率系数都接近与单个转子相关的对应值。随着转子间距离的增加，下游转子对上游转子的负面影响不断衰减。建议转子之间的距离大于转子直径的五倍。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号