长江科学院院报 ›› 2013, Vol. 30 ›› Issue (8): 54-57.DOI: 10.3969/j.issn.1001-5485.2013.08.0;2013,30(08)

• 高速水流与泄洪雾化 • 上一篇    下一篇

窄缝急流冲击波与水舌扩散规律研究

杜兰1,黄国兵1,王春龙2   

  1. 1.长江科学院水力学研究所,武汉430010;
    2.黄河万家寨水利枢纽有限公司,太原030002
  • 收稿日期:2013-08-13 修回日期:2013-08-13 出版日期:2013-08-13 发布日期:2013-08-13
  • 作者简介:杜兰(1985-),女,湖北襄阳人,助理工程师,主要从事枢纽与电站水力学研究,(电话)15872353580(电子信箱)kuailelanlan@163.com。
  • 基金资助:
    国家自然科学基金项目(51279013);中央级公益性科研院所基本科研业务费专项项目(CKSF2013023/SL)

Location of the Confluence of Rapid Flow Shock Waves and Regularityof Water Tongue Diffusion of Slit-Type Energy Dissipator

DU Lan1, HUANG Guo-bing1, WANG Chun-long2   

  1. 1.Hydraulics Department, Yangtze River Scientific Research Institute, Wuhan 430010, China;
    2.Yellow River Wanjiazhai Power Project Co. Ltd., Taiyuan 030002, China
  • Received:2013-08-13 Revised:2013-08-13 Online:2013-08-13 Published:2013-08-13

摘要: 采用模型试验手段,通过改变来流断面水流弗氏数Fr及窄缝收缩比β两个参数,重点研究了窄缝挑坎内急流冲击波交汇点位置及水流出坎后扩散规律。研究结果表明:β对冲击波交汇点位置影响较大,而来流Fr影响较小;β越大,冲击波交汇点越靠近挑坎出口;冲击波交汇后,挑坎内表面水体开始起挑,随着β的增大,水流出射角相应减小,β=0.2~0.25时,冲击波交汇点距挑坎出口距离占挑坎总长30%~40%,此时水舌扩散充分性及稳定性都较优。研究成果进一步丰富了对窄缝挑坎水力特性的认识,并为设计提供一定的理论依据。

关键词: 窄缝消能工, 急流冲击波, 收缩比, 水流弗氏数, 挑距

Abstract: By changing the inflow Froude number Fr and the contraction ratio β of narrow slit in model experiments, we researched the confluence location of rapid shock waves and the diffusion regularity of flow out of the slit-bucket. Results show that β has larger influence on the confluence location of rapid shock waves than Fr does; the larger β is, the closer the confluence location is to the flip bucket outlet. After the shock waves meet, the surface water in the bucket starts to shoot, and the outflow angle reduces correspondingly as β increases. When β=0.2~0.25,the confluence location of shock waves is 9.5~11.5 m away from the outlet of flip bucket, in which case the water tongue diffusion is more sufficient and stable. The research results enriched the understanding of hydraulic characteristics in slit-type bucket, and provide a theoretical basis for relative design.

Key words: slit-type energy dissipator, rapid flow shock wave, contraction ratio, Froude number, jet trajectory length

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