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Liquid jet trajectory and droplet path influenced by combined cross flow and electric fields
, Article Chemical Engineering Science ; Volume 181 , 18 May , 2018 , Pages 114-121 ; 00092509 (ISSN) ; Morad, M. R ; Rahbari, N ; Pejman Sereshkeh, S. R ; Razavi, M ; Sharif University of Technology
Elsevier Ltd
2018
Abstract
This study investigates an ethanol liquid jet subjected to combination of an air crossflow and a normal electric field. The results on the liquid jet trajectory and subsequent droplets flight paths are presented. The liquid jet trajectory was found as a function of two non-dimensional quantities; the liquid jet to the crossflow momentum ratio and the electroinertial number. The electroinertial number is defined as the ratio between the liquid jet specific momentum and the electric force. A correlation is introduced for the jet trajectory in low crossflow speeds and electric field intensities. The same two quantities control the detached droplets flight paths. Satellite droplets flight angles...
Experimental Study of an Electrospray and It's Application in Gaseous Cross Flow
, M.Sc. Thesis Sharif University of Technology ; Morad, Mohammad Reza (Supervisor)
Abstract
The purpose of this project is investigating the effect of cross flow and electric field on a liquid simple-jet experimentally. In this research the effect of parameters such as liquid to air momentum ratio, electric field on jet trajectory, penetration and the lenght of breakup point with respect to the jet outlet were studied. The air was produced by a blower in a duct with square test section of 8 cm sides. The air velocity varied from 1 m/s to 11 m/s. Liquid ethanol was injected into the duct with a needle with outer diameter of 0/62 mm and inner diameter of 0.4 mm and 28 mm length. The velocity of jet was 0/62 m/s while the change of liquid to air momentum ratio was from 3 to 260 The...
Experimental Investigation of Liquid Jet Break-up In Cross Flow by Effervesvent Injector
,
M.Sc. Thesis
Sharif University of Technology
;
Morad, Mohammad Reza
(Supervisor)
Abstract
In This Study break up and trajectory of aerated liquid jet in subsonic cross flow has been investigated. An effervescent two phase flow injector has been used with two different diameters for its external orifice. The effects of non-dimensional parameters on the trajectory of aerated liquid jet were evaluated. Water was used as the fluid for the purpose of producing liquid jet. Air was used to produce gaseous phase in the injector and the cross flow as well.
A duct with a square cross section and a blower in the inlet of the duct were used to produce the cross flow. Mixture of air and water was injected into the cross flow by the injector installed at the bottom of the duct. Shadowgraph...
A duct with a square cross section and a blower in the inlet of the duct were used to produce the cross flow. Mixture of air and water was injected into the cross flow by the injector installed at the bottom of the duct. Shadowgraph...
Experimental Study on Liquid Jet Disintegration in Gaseous Crossflow
, M.Sc. Thesis Sharif University of Technology ; Mazaheri, Karim (Supervisor) ; Morad, Mohammad Reza (Co-Advisor)
Abstract
In the present research, a test stand for investigating the behavior of an injected jet in cross flow, is established. In All experiments water and air was used as injected jet and cross flow respectively. At the beginning, with help of dimensional analysis, non-dimensional parameters are introduced and their effect of these parameter on the jet behavior, as the most important goal of this research, is investigated. In order to inject the fluid in the cross flow, two injector with 0.58 mm and 1.08 mm exit diameter and 10 mm exit length was used, and jet speed varies from 2 m/s to 12 m/s. The cross section of the wind tunnel was a 8cm-edge-square and the air speed was adjustable in the range...