Dynamic Pressure Fluctuations in Stepped Three-Side Spillway

سال انتشار: 1390
نوع سند: مقاله ژورنالی
زبان: انگلیسی
مشاهده: 874

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شناسه ملی سند علمی:

JR_IJEE-3-1_010

تاریخ نمایه سازی: 1 اردیبهشت 1393

چکیده مقاله:

One type of outlet works in dams are Three-side spillways that despite of their hydraulic limitations and construction problems, they were being selected, in storage dams, as best option under specifictopographical conditions. Considerable energy losses and great turbulence are hydraulic characteristic of thesespillways. Hydraulic performance with targeting to reduce pressure fluctuations in side channel is an important issue in this type of spillways design. In this study, effect of stepping of three-side spillway’s Ogee profile on the dynamic pressure fluctuation have been investigated using finite volume method and RNG turbulencemodel. The turbulence intensity as a dimensionless number was used for quantitative study of dynamicpressure fluctuations. The results showed that the proposed form of ogee profile caused a significant reduction in turbulence intensity within the side channel. On the other hand, the stepped Ogee profiles of three-side spillways caused to simple construction and ease of operation

نویسندگان

Hamed Taghizadeh

Department of Hydraulic Structures, Tarbiat Modares Univrsity, P.O. Box: ۱۴۱۵۵-۴۸۳۸, Tehran, Iran

Seyed Ali Akbar Salehi Neyshabour

Department of Civil Engineering Tarbiat Modares Univrsity, P.O. Box: ۱۴۱۵۵-۴۸۳۸, Tehran, Iran

Firouz Ghasemzadeh

Department of Hydraulic Structures, University of Tehran, P.O. Box: ۳۱۵۸۷-۷۷۸۷۱, Karaj, Iran