Sensitivity Test of Jet Velocity and Void Fraction on the Prediction of Rise Height and Performance of a Confined Plunging Liquid Jet Reactor

Autor:	Bader S. Al-Anzi, Jenifer Fernandes
Rok vydání:	2022
Předmět:	confined plunging jet reactor multiphase flow Chemical technology Astrophysics::High Energy Astrophysical Phenomena Process Chemistry and Technology rise height aeration dilution Bioengineering TP1-1185 Physics::Fluid Dynamics Chemistry Chemical Engineering (miscellaneous) QD1-999
Zdroj:	Processes, Vol 10, Iss 160, p 160 (2022) Processes; Volume 10; Issue 1; Pages: 160
ISSN:	2227-9717
Popis:	Jet velocity is an important parameter affecting the air entrainment rate of plunging liquid jet processes. While the vast majority of researchers have investigated the effect of jet velocity, only a few of them considered the effect of jet length in calculating the jet velocity at impingement point. This study investigates the difference (ΔV) between the jet velocity at the inception of the nozzle (Vj) and the impingement point (VL) for a range of operating conditions. Furthermore, bubble voidage inside the downcomer, another critical parameter in plunging jets, is estimated using three different voidage equations incorporated inside a momentum balance model to predict the two-phase elevation level (HR) inside the downcomer. Results showed that ΔV is significant (VL > Vj), especially at low jet flow rates and high jet lengths. Generally, the momentum balance model predicted the HR well, and its prediction improves with downcomer diameter. Given that, the model still needs to be refined for more accuracy for a wide range of operating conditions.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f3c5c5e0ba6ffb94b60b46f621cef850 https://doi.org/10.3390/pr10010160 Zobrazit plný text záznamu