Rapidly Varied Unsteady Flow in a Small Scale Dry Bed Model

  • سال انتشار: 1376
  • محل انتشار: ماهنامه بین المللی مهندسی، دوره: 10، شماره: 1
  • کد COI اختصاصی: JR_IJE-10-1_001
  • زبان مقاله: انگلیسی
  • تعداد مشاهده: 85
دانلود فایل این مقاله

نویسندگان

Y. Hassanzadeh

Civil Engineering, Tabriz University

چکیده

In this paper the rapidly varied unsteady flow caused by the failure of a dam in a rectangular dry bed horizontal channel has been studied both theoretically and experimentally. Experiments with dam-break flows in smooth and rough channel have been carried out. Comparisons have been made between measured depth hydrographs at different stations along the channel and analytical solution of Ritter and Dressier in this respect. It is Concluded that the forward zone of flow is highly sensitive to hydraulic resistance, consequently the measured forward wave velocities are markedly lower than those of theoretical one given by Ritter's solution. The roughness elements in the model, simulating the forest trees in prototype valley at downstream of the dam, tends to decrease the flow velocities and to increase flow depths. Finally the comparison showed that the experimental data of rough channel agreed closely with Dressler's solution. Thus, this latest theory may provide more satisfactory results for hydraulic prototypes previsions.

کلیدواژه ها

Dam, Break Problem, Dam Failure, Break Flood, Rapidly Varied Unsteady Flow

اطلاعات بیشتر در مورد COI

COI مخفف عبارت CIVILICA Object Identifier به معنی شناسه سیویلیکا برای اسناد است. COI کدی است که مطابق محل انتشار، به مقالات کنفرانسها و ژورنالهای داخل کشور به هنگام نمایه سازی بر روی پایگاه استنادی سیویلیکا اختصاص می یابد.

کد COI به مفهوم کد ملی اسناد نمایه شده در سیویلیکا است و کدی یکتا و ثابت است و به همین دلیل همواره قابلیت استناد و پیگیری دارد.