Detail publikace

Schlieren analysis of non-MILD distributed combustion in a mixture temperature-controlled burner

JÓZSA, V. MALÝ, M. FÜZESI, D. RÁCZ, E. KARDOS, R. JEDELSKÝ, J.

Originální název

Schlieren analysis of non-MILD distributed combustion in a mixture temperature-controlled burner

Typ

článek v časopise ve Web of Science, Jimp

Jazyk

angličtina

Originální abstrakt

It was recently demonstrated that distributed combustion is accessible outside the MILD combustion regime without needing inner or outer flue gas recirculation. The Mixture-Temperature Controlled combustion concept, which made it possible, offers excellent flame stability besides ultra-low emission. This concept is investigated presently to reveal the qualitative characteristics of the cold discharging mixture jet from the burner and its ignition. The Schlieren technique with a high-speed camera is the most suitable approach for this purpose, revealing the line-of-sight density gradients. Nine cases were evaluated, utilizing natural gas and diesel fuel, various equivalence ratios, and atomizing pressures. V-shaped flames were used as a baseline for comparing distributed combustion to it via direct images and velocity field using the PIVlab Matlab application. The results confirm the previous hypothesis that distributed combustion features a cold fuel-air mixture at the burner discharge that ignites downstream. The excellent flame stability comes from the fishbone-tiled coherent structures with significant random features, resulting in no characteristic frequency related to the flame. All these results comply with the previous findings by chemiluminescence emission and acoustic signal of distributed combustion, which techniques cannot be used to investigate the flame structure, unlike Schlieren imaging.

Klíčová slova

Turbulent; Burner; Swirl; Combustion; Schlieren; Distributed

Autoři

JÓZSA, V.; MALÝ, M.; FÜZESI, D.; RÁCZ, E.; KARDOS, R.; JEDELSKÝ, J.

Vydáno

15. 6. 2023

Nakladatel

Elsevier

Místo

OXFORD

ISSN

0360-5442

Periodikum

Energy

Ročník

273

Číslo

1

Stát

Spojené království Velké Británie a Severního Irska

Strany od

1

Strany do

12

Strany počet

12

URL

https://www.sciencedirect.com/science/article/pii/S0360544223006242

Plný text v Digitální knihovně

http://hdl.handle.net/11012/213602

BibTex

@article{BUT183162,
  author="Viktor {Józsa} and Milan {Malý} and Dániel {Füzesi} and Erika {Rácz} and Réka Anna {Kardos} and Jan {Jedelský}",
  title="Schlieren analysis of non-MILD distributed combustion in a mixture temperature-controlled burner",
  journal="Energy",
  year="2023",
  volume="273",
  number="1",
  pages="1--12",
  doi="10.1016/j.energy.2023.127230",
  issn="0360-5442",
  url="https://www.sciencedirect.com/science/article/pii/S0360544223006242"
}