Publication detail
Numerical Flow Field Prediction Downstream of Axial Guide Vane Swirl Generator
VONDÁL, J. HÁJEK, J.
Czech title
Numerická predikce rychlostního pole za axiálním, lopatkovým vířičem
English title
Numerical Flow Field Prediction Downstream of Axial Guide Vane Swirl Generator
Type
conference paper
Language
en
Original abstract
This paper utilizes current state of art in CFD simulations suitable for engineering application. The object of interest is an axial guide vane swirl generator often found in process burners. The aim is to validate available turbulence models suitable for flow field prediction in industrial combustors. The grid independence study on four grids supports choice of used grid. Influence of the outlet shape on the flow field inside the chamber and especially on recirculation zone shape is proved. Last, the comparison of the three turbulence models is provided. The most accurate is identified the Reynolds Stress turbulence model. Predicted velocity fields are compared with the measured data obtained from the literature. CFD predictions of all the turbulence models underestimate peak axial velocity and overestimate velocity in central recirculation zone on the chamber axis.
Czech abstract
Tento článek využívá současný stav techniky v CFD simulaci vhodné pro inženýrské aplikace. Předmětem zájmu je axiální lopatkový vířič, jež se často využívá v procesních hořácích. Cílem je ověření dostupných modelů turbulence vhodných pro predikci proudění v průmyslových pecích. Doložen je vliv geometrie výstupu ze spalovací komory na proudové pole v komoře a na tvar recirkulační zóny. Jsou porovnány tři modely turbulence. Jako nejpřesnější je identifikován Reynolds Stress Model. Predikované rychlostní pole je porovnáno s naměřenými daty z literatury. CFD u všech modelů turbulence podhodnocuje maximální axiální rychlost a nadhodnocuje rychlost v centrální recirkulační zóně na ose komory.
English abstract
This paper utilizes current state of art in CFD simulations suitable for engineering application. The object of interest is an axial guide vane swirl generator often found in process burners. The aim is to validate available turbulence models suitable for flow field prediction in industrial combustors. The grid independence study on four grids supports choice of used grid. Influence of the outlet shape on the flow field inside the chamber and especially on recirculation zone shape is proved. Last, the comparison of the three turbulence models is provided. The most accurate is identified the Reynolds Stress turbulence model. Predicted velocity fields are compared with the measured data obtained from the literature. CFD predictions of all the turbulence models underestimate peak axial velocity and overestimate velocity in central recirculation zone on the chamber axis.
Keywords in Czech
CFD, vířič, spalování, hořák
Keywords in English
CFD, swirler, swirl generator, combustion
RIV year
2014
Released
23.08.2014
Publisher
AIDIC Servizi S.r.l.
Location
Milan, Italy
ISBN
978-88-95608-30-3
ISSN
2283-9216
Book
Proceedings of the 17th Conference on Process Integration, Modelling and Optimisation for Energy Saving and Pollution Reduction PRES 2014
Volume
39
Edition number
39
Pages from–to
907–912
Pages count
6
BIBTEX
@inproceedings{BUT109962,
author="Jiří {Vondál} and Jiří {Hájek},
title="Numerical Flow Field Prediction Downstream of Axial Guide Vane Swirl Generator",
booktitle="Proceedings of the 17th Conference on Process Integration, Modelling and Optimisation for Energy Saving and Pollution Reduction PRES 2014",
year="2014",
volume="39",
month="August",
pages="907--912",
publisher="AIDIC Servizi S.r.l.",
address="Milan, Italy",
isbn="978-88-95608-30-3",
issn="2283-9216"
}