Fourth All-Union Conference on heat exchange and hydraulic resistance in a two-phase flow in elements of power machines and equipment

1971 ◽  
Vol 21 (1) ◽  
pp. 951-952
Author(s):  
B. L. Paskar' ◽  
M. Ya. Belen'kii
Keyword(s):  
Heat Exchange ◽  
Hydraulic Resistance ◽  
Two Phase Flow ◽  
Phase Flow ◽  
Two Phase ◽  
Union Conference

Influence of selected parameters on phenomena of two-phase flow and heat exchange in TSL furnace – numerical investigation

2017 ◽  
Vol 27 (12) ◽  
pp. 2799-2815
Author(s):  
Ewa Kolczyk ◽  
Zdzisław Miczkowski ◽  
Józef Czernecki
Keyword(s):  
Numerical Simulation ◽  
Heat Exchange ◽  
Liquid Slag ◽  
Gas Flow ◽  
Two Phase Flow ◽  
New Technology ◽  
Phase Flow ◽  
Two Phase ◽  
Content Type ◽  
Submerged Lance

Purpose The purpose of this study is application of a numerical simulation for determination of the influence of geometric parameters of a furnace and hydrodynamics of the gas introduced by a vertical submerged lance on the process of feed mixing and temperature distribution. Design/methodology/approach A numerical simulation with Phoenics software was applied for modeling of liquid phase movement and heat exchange between the gas supplied through a lance and the slag feed in a top submerged lance (TSL) furnace. The simulation of a two-phase flow of a slag–gas mixture based on the inter phase slip algorithm module was conducted. The influence of selected parameters, such as depth of lance submergence, gas flow rate and change of furnace geometry, on the phenomena of movement was studied. Findings Growth of dynamics of mixing with the depth of lance submergence and with increase of gas velocity in the lance was observed. Formation of a recirculation zone in the liquid slag was registered. Movement of the slag caused by the gas flow brought homogenization of the temperature field. Originality/value The study applied the simulation of a two-phase flow in the liquid slag–gas system in steady state, taking into account heat transfer between phases. It provides possibilities for optimization and selection of process parameters within the scope of the developed new technology using a TSL furnace.

Conference on Heat Exchange and Hydrostatic Resistance during the Motion of a Two-Phase Flow

1979 ◽  
Vol 46 (6) ◽  
pp. 485-486
Author(s):  
P. A. Ushakov ◽  
A. A. Ivashkevich
Keyword(s):  
Heat Exchange ◽  
Two Phase Flow ◽  
Phase Flow ◽  
Two Phase

Hydraulic resistance to forced two-phase flow of helium in narrow channels

1977 ◽  
Vol 42 (4) ◽  
pp. 381-383 ◽  
Author(s):  
V. I. Deev ◽  
Yu. V. Gordeev ◽  
A. I. Pridantsev ◽  
V. I. Petrovichev ◽  
V. V. Arkhipov
Keyword(s):  
Hydraulic Resistance ◽  
Two Phase Flow ◽  
Phase Flow ◽  
Two Phase ◽  
Narrow Channels

scholarly journals Hydraulic resistance of pipes under refrigerant boiling in horizontal and vertical evaporators in ship refrigerating machines

2020 ◽  
Vol 2020 (2) ◽  
pp. 92-99
Author(s):  
Vladimir Grigorievich Bukin ◽  
Aleksander Ivanovich Andreev ◽  
Aleksandr Vladimirovich Bukin
Keyword(s):  
Hydraulic Resistance ◽  
Two Phase Flow ◽  
Water Model ◽  
Phase Flow ◽  
Local Resistance ◽  
Two Phase ◽  
Flow Acceleration ◽  
Mixture Density ◽  
Head Losses ◽  
Main Components

The article presents the comparison of the head losses under the boiling refrigerant flow in horizontal and vertical evaporators. The values of all the components of the hydraulic resistance, such as the friction losses, local resistance, flow acceleration and leveling head have been calculated, compared and analyzed. Graphic dependences of the pressure loss of the two-phase flow on the mixture density and the apparatus height, as well as the effect of hydraulic resistances on the changes in boiling temperature have been obtained. It has been stated that studying the effectiveness of vertical evaporators comprises two main components: defining heat transfer and hydraulic resistance in the course of working fluids boiling in the vertical pipes. The second part of the study is under consideration. Vertical evaporators are higher than horizontal ones, which leads to greater losses when overcoming the leveling head of a larger column of a two-phase flow. Other components of the hydraulic resistance in the horizontal and vertical apparatus are comparable, although the friction losses and local resistance losses in the vertical evaporators may be less. In a vertical apparatus the main losses appear due to overcoming the leveling head, the remaining losses are smaller than in the horizontal apparatus. Therefore, when designing vertical apparatuses, one must not use the ratio of the apparatus length to its diameter, which is recommended for the horizontal apparatuses (L/d ratio for horizontal and vertical is 6). The ratio for the vertical apparatus should be significantly less. The experiments performed on the air-water model proved that L/d ratio of vertical evaporators should be within 1.0 ÷ 2. More precise values of this parameter can be found after testing R410A refrigerant.

scholarly journals Investigation of two-phase flow hydrodynamics of heat exchange tube outlet falling film evaporator

2021 ◽  
Author(s):  
V. N. Gushshamova ◽  
A. P. Khomyakov ◽  
S. V. Mordanov ◽  
T. V. Khomyakova
Keyword(s):  
Heat Exchange ◽  
Two Phase Flow ◽  
Phase Flow ◽  
Falling Film ◽  
Two Phase ◽  
Film Evaporator ◽  
Heat Exchange Tube

scholarly journals Non-equilibrium relativistic two-phase flow with heat exchange

2012 ◽  
Vol 70 (4) ◽  
pp. 773-786
Author(s):  
Sebastiano Giambò ◽  
Giuseppa Muscianisi
Keyword(s):  
Heat Exchange ◽  
Two Phase Flow ◽  
Phase Flow ◽  
Two Phase ◽  
Non Equilibrium
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