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Naslov:Analysis of the effect of the swirl flow intensity on combustion characteristics in liquid fuel powered confined swirling flames
Avtorji:ID Klančišar, Marko (Avtor)
ID Schloen, Tim (Avtor)
ID Hriberšek, Matjaž (Avtor)
ID Samec, Niko (Avtor)
Datoteke:.pdf Journal_of_Applied_Fluid_Mechanics_2016_Klancisar_et_al._Analysis_of_the_Effect_of_the_Swirl_Flow_Intensity_on_Combustion_Characteristic.pdf (1,08 MB)
MD5: CC1E4316E1C8133A403C5D608278289D
PID: 20.500.12556/dkum/a9b1587f-89c4-4c08-bc08-8ffa586b4a4d
 
URL http://jafmonline.net/web/guest/home?p_p_id=JournalArchive_WAR_JournalArchive_INSTANCE_nvhn&p_p_action=0&p_p_state=maximized&p_p_mode=view&_JournalArchive_WAR_JournalArchive_INSTANCE_nvhn_form_page=main_form&selectedVolumeId=68&selectedIssueId=236
 
Jezik:Angleški jezik
Vrsta gradiva:Znanstveno delo
Tipologija:1.01 - Izvirni znanstveni članek
Organizacija:FS - Fakulteta za strojništvo
Opis:This article examines the implementation of CFD technology in the design of the industrial liquid fuel powered swirl flame burner. The coupling between the flow field and the combustion model is based on the eddy dissipation model. The choice of the LES (Large Eddy Simulation) turbulence model over standard RANS (Reynolds Averaged Navier-Stokes) offers a possibility to improve the quality of the combustion-flow field interaction. The Wall Adapting Local Eddy-Viscosity (WALE) sub-grid model was used. The reaction chemistry is a simple infinitely fast one step global irreversible reaction. The computational model was setup with the Ansys-CFX software. Through the detailed measurements of industrial size burner, it was possible to determine the natural operational state of the burner according to the type of fuel used. For the inlet conditions, axial and radial velocity components were calculated from known physical characteristics of both the fuel and air input, with the initial tangential velocity of the fuel assumed as 18% of the initial axial fuel velocity. Different swirl number (S) values were studied. Addition of a surplus (in comparison to conventional flame stabilization) of tangential air velocity component (W), the rotational component increases itself with a considerably high magnitude, contributing to the overall flame stabilization. The level of S especially influences the turbulent energy, its dissipation rate and turbulent (Reynolds) stresses. In the case of high swirl number values (S > 0,65) it is possible to divide the flow field in three principle areas: mixing area (fuel-air), where exothermal reactions are taking place, central recirculation area and outer recirculation area, which primarily contains the flow of burnt flue gases. The described model was used to determine the flow and chemical behavior, whereas the liquid atomization was accounted for by LISA (Linear Instability Sheet Atomization) model incorporating also the cavitation within injection boundary condition. The boundary conditions were determined based on the data from the experimental hot water system. Depending on system requirements, especially with continuous physical processes as well as the results of experimental measurements, the paper reports on determination of the mixing field and its intensity in the turbulent flow, the description of heat release and interaction of turbulent flow field and chemical kinetics in the case of confined swirling flames.
Ključne besede:CFD, fluid dispersion, combustion, industrial burner, confined swirling flame, two-phase flow
Status publikacije:Objavljeno
Verzija publikacije:Objavljena publikacija
Leto izida:2016
Št. strani:str. 2359-2367
Številčenje:Letn. 9, št. 5
PID:20.500.12556/DKUM-67159 Novo okno
ISSN:1735-3572
UDK:662.992.8:536.662
COBISS.SI-ID:19756054 Novo okno
ISSN pri članku:1735-3572
NUK URN:URN:SI:UM:DK:LID6SHON
Datum objave v DKUM:04.08.2017
Število ogledov:1352
Število prenosov:382
Metapodatki:XML RDF-CHPDL DC-XML DC-RDF
Področja:Ostalo
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Vaša ocena:Ocenjevanje je dovoljeno samo prijavljenim uporabnikom.
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Gradivo je del revije

Naslov:Journal of Applied Fluid Mechanics
Založnik:Isfahan University of Technology
ISSN:1735-3572
COBISS.SI-ID:19549974 Novo okno

Licence

Licenca:CC BY-NC-ND 4.0, Creative Commons Priznanje avtorstva-Nekomercialno-Brez predelav 4.0 Mednarodna
Povezava:http://creativecommons.org/licenses/by-nc-nd/4.0/deed.sl
Opis:Najbolj omejujoča licenca Creative Commons. Uporabniki lahko prenesejo in delijo delo v nekomercialne namene in ga ne smejo uporabiti za nobene druge namene.
Začetek licenciranja:04.08.2017

Sekundarni jezik

Jezik:Slovenski jezik
Ključne besede:CFD, mehanika tekočin, zgorevanje, turbulentni tok, industrijski gorilniki, razprševanje goriva


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