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Register a new userImplementation of Heat Flux and Mass Velocity on Steam Mass Content of Flow Boiling Regimes in Vertical Two Phase Forced Flow Tubes
تأثير الكثافة الحرارية و السرعة الكتلية في محتوى البخار الكتلي لأنظمة الغليان و الجريان القسري ثنائي الطور في الأنابيب الشاقولية
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درِس في هذا البحث تأثير تغير كل من الكثافة الحرارية و السرعة الكتلية في تغير محتوى البخار الكتلي على طول أنبوب توليد البخار لمختلف أنظمة الغليان و الجريان القسري للتيار ثنائي الطور داخل الأنابيب الشاقولية.
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.
References used
DELHAYE J.M.;GIOT M.; RIETHTHMULLER M.L.; Thermohydraulics of Two-Phase Systems for Industrial Design and Nuclear Engineering ,1981 Hemisphere publishing corporation, McGraw-Hill Book Company
PETUKHOV B.C.;GENIN L.G. ;KOVALEOV S.A.; Heat Transfer in Nuclear Power Units ,1986 Power Atom Press Moscow
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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 oil reservoirs exploitation processes are one of very important
steps of petroleum industry. The rentability of investor reservoir is
related to correct planning and accurate understanding of rock
properties and liquids flow in porous media. T
he complexity of
porous media contains hydrocarbon materials, with phases changes related to thermo-physiochemical phenomena, make the classical methods used to study the reservoir recovery are inaccurate and insufficient to predict the performance and behavior of reservoir.
Recently, simulation and modeling are used to decrease the risks in the decision of the optimal recovery method, and achieve the best possible rentability. This method provides predictive capacity help us to better understanding of reservoir. By the suitable input data, we can solve the calibrated mathematical model analytically or numerically. We present in this research the formulation of
mathematical model of isotropic-one dimension reservoir with
single phase fluid flow. The numerical solution, the application of
this model, and the mechanism of pressure diffusivity along
productive formation, will be presented to simulate a reservoir with injection and production wells.
This paper presents an experimental investigation of the flow pattern and wall pressure due to the change of the opening discharge diameter in cylindrical silos. The experiments were performed on a
metal silo prototype using corn as a granular mater
ial. The silo prototype used in the study was built of a metallic cylinder, which can be opened longitudinally allowing the observation of the flow pattern
through a plexi-glass wall, and the wall pressure distribution was measured using a special granular pressure transducer. The present study revealed unexpected results to what might be expected through
current theoretical knowledge.
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 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.
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