中文核心期刊
CSCD来源期刊
中国科技核心期刊
RCCSE中国核心学术期刊

重庆交通大学学报(自然科学版) ›› 1995, Vol. 14 ›› Issue (3): 57-63.

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弯道的动量和能量系数

许光祥   

  1. 重庆交通学院水港系
  • 收稿日期:1994-11-18 修回日期:1995-01-17 出版日期:1995-09-15 发布日期:2015-04-15
  • 作者简介:许光祥,男,29岁,讲师

Momentum and Energy Coenicients for River Curve

Xu GuangXiang   

  1. Chongqing Institute of Communications
  • Received:1994-11-18 Revised:1995-01-17 Online:1995-09-15 Published:2015-04-15

摘要: 本文从动量系数(β)和能量系数(α)的定义出发,根据Engelund弯道流速分布理论,导出弯道的β和α的表达式.它们均可表示为一个只与弯道宽径比D(B/Rc)有关的系数和顺直河道的β或α的乘积,同时讨论了采用β=α=1的偏差情况,有助于提高水力计算的精度.

关键词: 弯道, 动量系数, 能量系数, 宽径比

Abstract: Based on the definition of momentum coefficient(β)andenergy coefficient(α),this paper derives expressions forβ and a from Engelund’s formula of the velocity distribution for curve. They can be expressed as product of the parame-ter only related to rate of width B to radius Reand βor α for straight channel.The results of β and α are discussed. Thispopor is of practical sign ificance to improve accuracy of hydraulic calculation.

Key words: curve, momentum coefficient, energy coefficient, rate of width to radius

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