scholarly journals NUMERICAL SIMULATION OF THE SWIRLED FLOW OF WATER STEAM PLASMA WITH ALUMINUM MICROPARTICLES

2021 ◽  
Vol 6 (4) ◽  
pp. 25-34
Author(s):  
I. P. Zavershinskii ◽  
D. P. Porfirev
Keyword(s):  
Numerical Simulation ◽  
Water Vapor ◽  
Vortex Flow ◽  
Discharge Plasma ◽  
Pure Water ◽  
Kinetic Scheme ◽  
Molecular Complexes ◽  
Aluminum Particles ◽  
Water Steam ◽  
Heating Source

A study of the discharge plasma with a vortex flow of an argon + water vapor mixture with aluminum particles in a tube of a plasma vortex reactor (PVR) was carried out. The parameters of the discharge, plasma, and working flow in the PVR have been measured. Spectral methods were used to estimate the electron temperature, rotational and vibrational temperatures of excited molecular complexes, the temperature of metal clusters, and the electron density of plasma. A kinetic scheme is proposed for calculating the operating modes in a reactor using a water vapor discharge with aluminum particles. Numerical simulation of a vortex flow of pure water vapor with aluminum particles in the presence of a heating source is carried out.

CFD Study on Supersonic Ejectors Used for Suction of Two Different Gases

2015 ◽  
Author(s):  
Mohsen Tavakol ◽  
Maziar Shafaee
Keyword(s):  
Numerical Simulation ◽  
Water Vapor ◽  
Mass Fraction ◽  
Pure Water ◽  
Variable Mass ◽  
Working Fluid ◽  
Gas Streams ◽  
Mass Fractions ◽  
Suction Flow ◽  
Different Gases

In ejector refrigeration cycles, ejector working fluids include various refrigerants with different properties. In some cases, ejector works with mixture of two different refrigerants; that each refrigerant have distinct properties. The purpose of this paper is to evaluate the performance of an ejector used for suction of a mixture of air and water vapor. In this regard, the ejector performance was numerically studied under the operating condition that a mixture of air and steam with variable mass fractions, were sucked into the ejector. With the help of numerical simulation, various conditions for two perfect gas streams of air and water vapor were investigated. Initially, the numerical simulation was carried out for the case that pure water vapor was considered as the working fluid of ejector. After validation of initial case with experimental data, numerical method was expanded for a specific case that, water vapor was considered as the working fluid of motive flow and a mixture of air and water vapor was considered for suction flow. Numerical simulations were done for different mass fraction of air and water vapor for suction flow mixture. Results indicated that, variations of the mass fraction of air in suction flow, leads to obvious changes in ejector performance. Also, it was observed that the increment of suction flow pressure, leads to increment of the ejector performance sensitivity to variations of suction flow mass fraction.

scholarly journals Numerical simulation and experimental verification of gas streams feeding a gliding discharge plasma reactor

2013 ◽  
Vol 61 (2) ◽  
pp. 24321
Author(s):  
Teresa Opalińska ◽  
Małgorzata Majdak ◽  
Janusz Piechna ◽  
Witold Selerowicz ◽  
Bartłomiej Wnek
Keyword(s):  
Numerical Simulation ◽  
Experimental Verification ◽  
Discharge Plasma ◽  
Plasma Reactor ◽  
Gas Streams ◽  
Gliding Discharge

Enhanced vortex stability in trapped vortex combustor

2010 ◽  
Vol 114 (1155) ◽  
pp. 333-337 ◽  
Author(s):  
S. Vengadesan ◽  
C. Sony
Keyword(s):  
Numerical Simulation ◽  
Vortex Flow ◽  
Cavity Size ◽  
Vortex Stability ◽  
Cold Flow ◽  
Air Jets ◽  
Passive Flow ◽  
Flow Through ◽  
Trapped Vortex ◽  
Driver Air

Abstract The Trapped Vortex Combustor (TVC) is a new design concept in which cavities are designed to trap a vortex flow structure established through the use of driver air jets located along the cavity walls. TVC offers many advantages when compared to conventional swirl-stabilised combustors. In the present work, numerical investigation of cold flow (non-reacting) through the two-cavity trapped vortex combustor is performed. The numerical simulation involves passive flow through the two-cavity TVC to obtain an optimum cavity size to trap stable vortices inside the second cavity and to observe the characteristics of the two cavity TVC. From the flow attributes, it is inferred that vortex stability is achieved by circulation and the vortex is trapped inside when a second afterbody is added.

Numerical Simulation Analysis for Scroll of Scroll Compressor Based on ABAQUS

2014 ◽  
Vol 488-489 ◽  
pp. 1047-1051
Author(s):  
Qing Qian Zheng ◽  
Bin Yang ◽  
Ning Chen ◽  
Hui Min Yang ◽  
Min Hu
Keyword(s):  
Numerical Simulation ◽  
Stress Distribution ◽  
Thermal Deformation ◽  
Vortex Flow ◽  
Simulation Analysis ◽  
Temperature Load ◽  
Stress And Deformation ◽  
Finite Method ◽  
Abaqus Software ◽  
Main Factor

In this paper, the finite method is applied and ABAQUS software is used, the vortex flow field is loaded as boundary condition of wraps. The stress and deformation in scroll under the action of gas pressure, temperature load and both of them is analyzed, the stress distribution and deformation of wraps in different shaft rotation angles is discussed, the stress distribution and deformation discipline of wraps are also respectively obtained. The results show that the overall stress and deformation in scroll are the largest when compression chamber is moving near the vent position and the thermal deformation is the main factor of affecting the overall deformation of scroll.

scholarly journals Numerical simulation of the accumulation of heavy particles in a circular bounded vortex flow

2016 ◽  
Vol 87 ◽  
pp. 80-89 ◽  
Author(s):  
Xiaoke Ku ◽  
Jianzhong Lin ◽  
Martin van Sint Annaland ◽  
Rob Hagmeijer
Keyword(s):  
Numerical Simulation ◽  
Vortex Flow ◽  
Heavy Particles

Transformations of neutral particles in the discharge plasma in inert gases with water vapor and deuterium

2018 ◽  
Vol 25 (8) ◽  
pp. 083517 ◽  
Author(s):  
A. V. Bernatskiy ◽  
I. V. Kochetov ◽  
V. N. Ochkin
Keyword(s):  
Water Vapor ◽  
Discharge Plasma ◽  
Inert Gases ◽  
Neutral Particles

scholarly journals Slit Wall Effect on the Stability of Wavy Vortex Flow

2014 ◽  
Vol 6 ◽  
pp. 853069 ◽  
Author(s):  
Dong Liu ◽  
Ying-ze Wang ◽  
Hyoung-Bum Kim ◽  
Fang-neng Zhu ◽  
Chun-lin Wang
Keyword(s):  
Numerical Simulation ◽  
Flow Field ◽  
Radial Velocity ◽  
Flow Regime ◽  
Experimental Measurement ◽  
Vortex Flow ◽  
Wall Effect ◽  
Taylor Vortices ◽  
Simulation Results ◽  
The Stability

The wavy vortex flow in the plain model was studied by experimental measurement; the preliminary feature of wavy vortex flow was obtained. This flow field in the plain model was also studied by numerical simulation. The reliability of numerical simulation was verified by comparing with the experimental and numerical simulation results. To study the slit wall effect on the wavy vortex flow regime, another two models with different slit number were considered; the slit number was 6 and 12. By comparing the wavy vortex flow field in different models, the axial fluctuation of Taylor vortices was found to be different, which was increased with the increasing of slit number. The maximum radial velocity from the inner cylinder to the outer one in the 6-slit number was increased by 12.7% compared to that of plain model. From the results of different circumferential position in the same slit model, it can be found that the maximum radial velocity in slit plane is significantly greater than that in other planes. The size of Taylor vortices in different models was also calculated, which was found to be increased in the 6-slit model but was not changed as the slit number increased further.

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