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Register a new userFree Combined Flow Over a Triangular Weir and Under Rectangular Gate
الجريان الحر المشترك فوق الهدارات المثلثية و تحت البوابات مستطيلة الشكل
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الهدف الرئيس للبحث هو إيجاد خصائص الجريان الحر فوق الهدارات المثلثيـة ، و تحـت البوابات مستطيلة الشكل (الفتحة) حيث تم إنشاء تسعة نماذج لهذا النوع من الهدارات بزوايا مختلفة للهدار المثلث.
The main objective of this investigation is to find the characteristics of free flow through the combined triangular weir and a rectangular gate. Nine combined weirs were constructed and tested for three different triangular angles.
References used
Abdel-Azim et al.,(2002) ,"Combined of Free Flow Over Weirs and Below Gates ", Journal of Hydraulic Research,Vol.40,NO.3
Abdel-Azim M. Negm, (2003),"Modeling of Submerged Simultaneous Flow Through Combined Weirs and Gates Devices, Faculty of Engineering Zagzaig University Egypt, Journal of hydraulic Research
Alhamid, A.A., Negm, A.M. and Al-Brahim, A.M.,(1997),"Discharge Equation for Proposed Self-Cleaning Device", Journal of King Sand University, Engineering ,Science, Riyadh, Saudia Arabia,Vol.9,No.1, pp.13-24
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In this paper, an oblique side weir was studied by nine models installed at the entrance of
side channel at an angles (300,450,600,750 and 900) respected to side channel wall and installed at
two directions, with flow direction and opposite it. The
models were tested by five different flows
passing over them so, the number of runs is 45.
The hydraulic characteristics of flow over vertical and oblique side weir were studied, and
the results show increasing of discharge over side weir when installed at an oblique direction
and the average increases when their inclination at left direction was greater (6%) than that
right direction.
Equations were predicted for calculation of discharge coefficient (Cd) and coefficient of
energy loss (k) for two directions and the water surface profile for vertical and oblique side weir
in two directions is plotted.
The study attempts to explore the structure of poetic
image in the free verse of modern poetry which is considered as the main
feature of modernity that lies in the elements of surprise and paradox,
deviation and spacious fantasy which opens up horizons to the recipients
for multiple and open readings.
In this paper we have studied the implementation of variation of heat flux and mass velocity on the
variation of steam mass content along of steam generation tube for various two phase forced flow boiling
regimes of vertical tubes.
In this paper, we studied flow and boiling regimes of two-phase forced flow in
vertical tubes to determine the dominated flow and boiling regime at any region of tube.
Studied Ranges of main parameters were: Pressure. Because
of absence an accurat
e method of flow and boiling regimes prediction, some of
experimental equations of two phase flow (liquid-steam) had been used to determine the
dominated flow and boiling regime in vertical tubes and build algorithm written by Matlab
environment describes these regimes. An analytical study was provided of the resulted
diagrams and suggestions were given for next studies .
محتوى البخار الكتلي
نظام الجريان
نظام الغليان
جريان ثنائي الطور
السرعة الكتلية
الغليان السطحي
الغليان النووي
محتوى البخار الحقيقي
الإنتالبي النسبي
Flow regime
boiling regime
Two phase flow
mass velocity
surface boiling
nucleate boiling
actual steam content
mass steam content
relative enthalpy
المزيد..
The studied area forms a part of the coastal basin on the east coast of the
Mediterranean Sea located north of Tartous city.The area is bordered by the Mediterranean
Sea from the west. And (jobar,banias, albasia) rivers from north, al Housen river
from the
south. The area covers about (358) km2.
The research aims to find arelationship between rainfall and flow within Mrqiyeh
River Basin, by conducting analytical statistical study using Minitab software, which helps
in completing the measurements are not available, and to predict the river flows depending
on the expected precipitation in the river basin. The study found that the relationship is:Q =
216 + 0.0379 P - 36.8ln (P) + 3.46ln(Q) ,and rainfall reflect 87.2% of the changes that
occur to the flow of the river. The study recommended that need to intensify the river
discharges measurements in order to increase the reliability of their data.
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