Detail publikace

Internal two-phase flow and spray characteristics of outside-in-liquid twin-fluid atomizers

HAMMAD, F. SUN, K. CHE, Z. JEDELSKÝ, J. TIANYOU, W.

Originální název

Internal two-phase flow and spray characteristics of outside-in-liquid twin-fluid atomizers

Typ

článek v časopise ve Web of Science, Jimp

Jazyk

angličtina

Originální abstrakt

Despite its wide industrial applications, the internal-mixing twin-fluid atomization suffers a major problem of spray unsteadiness. This work links the flow characteristics inside a newly designed outside-in-liquid (OIL) atomizer with the spray stability and quality by flow visualization and digital image processing. The results show that the inhomogeneous bubbly and slug flow regimes cause an unwanted intermittent flow inside the exit orifice and an unstable coarse spray, while the stable-annular or the wavy-annular chamber flows provide a favorable continuous annular flow inside the exit orifice and a stable fine spray. By proposing a new parameter considering liquid/gas momentum ratio per liquid injection hole, a flow regime map is constructed, and the transition criterion between the favorable annular flow and the unfavorable intermittent flow regimes inside the exit orifice is obtained. A direct relation between the Sauter mean diameter of the spray droplets and the internal flow transition parameter is found. This study indicates that, under specific internal geometries, the optimized OIL atomizer can overcome the spray unsteadiness problem and hence is suitable for applications requiring high spray stability and quality.

Klíčová slova

Twin-fluid atomization, Outside-in-liquid atomizer, Spray unsteadiness, Spray characteristics, Flow regime map

Autoři

HAMMAD, F.; SUN, K.; CHE, Z.; JEDELSKÝ, J.; TIANYOU, W.

Vydáno

9. 1. 2021

Nakladatel

Elsevier Ltd.

Místo

The Boulevard, Langford Lane, Kidlington, Oxford OX5 1GB, UK

ISSN

1359-4311

Periodikum

Applied Thermal Engineering

Ročník

187

Číslo

1

Stát

Spojené království Velké Británie a Severního Irska

Strany od

1

Strany do

18

Strany počet

18

URL

https://www.sciencedirect.com/science/article/pii/S1359431121000120

Plný text v Digitální knihovně

http://hdl.handle.net/11012/195909

BibTex

@article{BUT168043,
  author="Farid A. {Hammad} and Kai {Sun} and Zhizhao {Che} and Jan {Jedelský} and Wang {Tianyou}",
  title="Internal two-phase flow and spray characteristics of outside-in-liquid twin-fluid atomizers",
  journal="Applied Thermal Engineering",
  year="2021",
  volume="187",
  number="1",
  pages="1--18",
  doi="10.1016/j.applthermaleng.2021.116555",
  issn="1359-4311",
  url="https://www.sciencedirect.com/science/article/pii/S1359431121000120"
}