Detail publikace

Spraying of viscous liquids: influence of the fluids mixing mechanism on the performance of the internal-mixing twin fluid atomizers

MLKVIK, M. JEDELSKÝ, J. KARBSTEIN, H. GAUKEL, V.

Originální název

Spraying of viscous liquids: influence of the fluids mixing mechanism on the performance of the internal-mixing twin fluid atomizers

Typ

článek v časopise ve Web of Science, Jimp

Jazyk

angličtina

Originální abstrakt

The thermal usage of liquid fuels implies their combustion, which is a process strongly influenced by the performance of the atomizer, which disrupts the fuel into drops of the required sizes. The spray quality of the twin-fluid atomizers with internal mixing (IM-TFA) is primarily influenced by the two-phase flow pattern inside the mixing chamber. We studied the performance of the four types of the IM-TFA nozzles by the optical diffraction system (Malvern Spraytec) to answer the question of how the mixing chamber design influences the spray quality at low atomizing gas consumption. We tested the effervescent atomizer in outside-in-liquid (OIL) and outside-in-gas (OIG) configurations, the Y-jet nozzle and new nozzle design, and the CFT atomizer when spraying model liquids with the viscosities comparable to the common fuels (mu=60and143mPa center dot s). We found that the effervescent atomizer performance was strongly influenced by the configuration of the inlet ports. Although the OIL configuration provided the best spray quality (D32= 72 mu m), with the highest efficiency (0.16%), the OIG nozzle was characterized by unstable work and poor spray quality. Both the devices were sensitive to liquid viscosity. The Y-jet nozzle provided a stable performance over the liquid viscosity spectrum, but the spray quality and efficiency were lower than for the OIL nozzle. Our findings can be used to improve the performance of the common IM-TFA types or to design new atomizers. The results also provide an overview of the tested atomizers' performances over the wide range of working conditions and, thus, help to define the application potential of the tested nozzle designs.

Klíčová slova

Twin-fluid atomizer; Two-phase flow; Atomization; Spray imagining; Comparison of atomizers; Spraying efficiency; Droplet size correlations

Autoři

MLKVIK, M.; JEDELSKÝ, J.; KARBSTEIN, H.; GAUKEL, V.

Vydáno

30. 7. 2020

Nakladatel

MDPI

Místo

Basel, Switzerland

ISSN

2076-3417

Periodikum

Applied Sciences - Basel

Ročník

10

Číslo

15

Stát

Švýcarská konfederace

Strany od

1

Strany do

17

Strany počet

17

URL

https://www.mdpi.com/2076-3417/10/15/5249

Plný text v Digitální knihovně

http://hdl.handle.net/11012/195907

BibTex

@article{BUT168014,
  author="Marek {Mlkvik} and Jan {Jedelský} and Heike P. {Karbstein} and Volker {Gaukel}",
  title="Spraying of viscous liquids: influence of the fluids mixing mechanism on the performance of the internal-mixing twin fluid atomizers",
  journal="Applied Sciences - Basel",
  year="2020",
  volume="10",
  number="15",
  pages="1--17",
  doi="10.3390/app10155249",
  issn="2076-3417",
  url="https://www.mdpi.com/2076-3417/10/15/5249"
}