The Effect of Geometrical, Operational, Mixing Methods, and Rheological Parameters on Discharge Coefficients of Internal-Mixing Twin-Fluid Atomizers

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26210%2F20%3APU138561" target="_blank" >RIV/00216305:26210/20:PU138561 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.mdpi.com/2227-9717/8/5/563" target="_blank" >https://www.mdpi.com/2227-9717/8/5/563</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.3390/PR8050563" target="_blank" >10.3390/PR8050563</a>

Jazyk výsledku

angličtina

Název v původním jazyce

The Effect of Geometrical, Operational, Mixing Methods, and Rheological Parameters on Discharge Coefficients of Internal-Mixing Twin-Fluid Atomizers

Popis výsledku v původním jazyce

Accurate prediction of the discharge coefficient (C-D) for internal-mixing twin-fluid (IMTF) atomizers is challenging, the effect of control factors remains inadequately understood, and comparative data on the C(D)of IMTF atomizers are unavailable. This work presents an experimental study on C-D for different IMTF atomizers with a wide range of factors, including the gas-to-liquid ratio (GLR), the inlet-overpressure ratio (Delta p(mix)/p(amb)), the orifice length-to-diameter ratio (L-o/d(o)), and the liquid viscosity (mu(L)). Five atomizers with different internal-mixing principles were probed on a cold test rig, including the frequently studied outside-in-gas (OIG) and inside-out-gas (IOG) effervescent types, the recently-introduced outside-in-liquid (OIL) and air-core-liquid-ring (ACLR) atomizers, and our new design named the swirling-air-core-liquid-ring (SACLR) atomizer. The results demonstrate that C-D is governed mainly by GLR, and reduces if GLR, L-o/d(o), or mu(L)is increased. An increase in Delta p(mix)/p(amb)causes a C-D reduction up to Delta p(mix)/p(amb)= 0.98, and C-D increases for a higher Delta p(mix)/p(amb). Surprisingly, differences in C-D amid examined atomizers were found negligible, although the flow visualization inside the orifice showed a significantly different flow character for each one of the atomizers. Finally, a general C-D correlation fitting with an R-2 >= 0.99 for all the tested nozzles was proposed. The results amend the present knowledge, allow design optimization, and provide flow rate prediction for a variety of IMTF atomizers.

Název v anglickém jazyce

The Effect of Geometrical, Operational, Mixing Methods, and Rheological Parameters on Discharge Coefficients of Internal-Mixing Twin-Fluid Atomizers

Popis výsledku anglicky

Accurate prediction of the discharge coefficient (C-D) for internal-mixing twin-fluid (IMTF) atomizers is challenging, the effect of control factors remains inadequately understood, and comparative data on the C(D)of IMTF atomizers are unavailable. This work presents an experimental study on C-D for different IMTF atomizers with a wide range of factors, including the gas-to-liquid ratio (GLR), the inlet-overpressure ratio (Delta p(mix)/p(amb)), the orifice length-to-diameter ratio (L-o/d(o)), and the liquid viscosity (mu(L)). Five atomizers with different internal-mixing principles were probed on a cold test rig, including the frequently studied outside-in-gas (OIG) and inside-out-gas (IOG) effervescent types, the recently-introduced outside-in-liquid (OIL) and air-core-liquid-ring (ACLR) atomizers, and our new design named the swirling-air-core-liquid-ring (SACLR) atomizer. The results demonstrate that C-D is governed mainly by GLR, and reduces if GLR, L-o/d(o), or mu(L)is increased. An increase in Delta p(mix)/p(amb)causes a C-D reduction up to Delta p(mix)/p(amb)= 0.98, and C-D increases for a higher Delta p(mix)/p(amb). Surprisingly, differences in C-D amid examined atomizers were found negligible, although the flow visualization inside the orifice showed a significantly different flow character for each one of the atomizers. Finally, a general C-D correlation fitting with an R-2 >= 0.99 for all the tested nozzles was proposed. The results amend the present knowledge, allow design optimization, and provide flow rate prediction for a variety of IMTF atomizers.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10305 - Fluids and plasma physics (including surface physics)

Projekt

<a href="/cs/project/LTAIN19044" target="_blank" >LTAIN19044: Vývoj energeticky úsporného dvoumédiového atomizéru pro účinné odstraňování CO2 a NOx z produktů spalování</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2020

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Processes

ISSN

2227-9717

e-ISSN

—

Svazek periodika

8

Číslo periodika v rámci svazku

5

Stát vydavatele periodika

CH - Švýcarská konfederace

Počet stran výsledku

22

Strana od-do

1-22

Kód UT WoS článku

000541752600005

EID výsledku v databázi Scopus

2-s2.0-85085688294