An Experiment on Flow Distribution and Mixing in Impinging Jet Sprays

Lee, C. H.; Jung, Youngjai; Chung, Suk Ho

doi:10.1615/atomizspr.v9.i2.50

Cited by 8 publications

(4 citation statements)

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“…The formation and break-up of liquid sheet waves and ligaments dictates the eventual droplet distribution and sizing. Lee et al [24] use droplet distributions to highlight some trends of like and unlike impingement.…”

Section: Droplet Studiesmentioning

confidence: 99%

Mixing Analysis of Like Doublet Injectors in High Pressure Environments for Gelled Propellant Simulants

Notaro

2014

50th AIAA/ASME/SAE/ASEE Joint Propulsion Conference

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Impinging doublet injectors offer rocket designers an effective way to atomize and mix opposing jets of fuel and oxidizer. The adaptability of the injector designs and ease of manufacturing make them attractive choices for designers. The adaptability of injector designs introduces many variables to the system like orifice diameter, nozzle orifice pairings, and working fluid to name a few. This expanse of variables requires This work would not have been possible without the support from United States Army Research Office under the Multi-University Research Initiative. I would like to thank Dr. Jong Guen Lee for allowing me this graduate opportunity and for his academic support through my undergraduate studies and my graduate research. I would also like to thank my committee members of Dr. San-Mou Jeng and Dr. Milind Jog. I appreciate them taking time and effort to apply their expertise to critiquing my work. There are a few students and a staff member I would like to thank for their help with experimentation. The student members are Chandra Ramasubramanian, Charlie Hinton, Jake Keller, Vaughn Bostwick, Andrew Stubblebine, Wessam Estefanos and Jun Hee Han. They were invaluable help during setup and testing. The staff member is Curt Fox who without his help, I would have been able to work as efficiently and as safely. Lastly, I want to thank my friends and family for their support throughout my academic journey.

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Section: Droplet Studiesmentioning

confidence: 99%

Mixing Analysis of Like Doublet Injectors in High Pressure Environments for Gelled Propellant Simulants

Notaro

2014

50th AIAA/ASME/SAE/ASEE Joint Propulsion Conference

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“…Lee et al [9] applied the wall-impinging jet model of Reitz and Naber [11] to calculate the flow rate of each jet in asymmetric impinging jets. Similarly, the jets of the present asymmetric impinging jets are treated as a wall-impinging jet in which each jet has a wallimpinging angle characterized by w and s , as defined in Fig.…”

Section: Theoretical Models To Predict the Distribution Of The Drop Sizementioning

confidence: 99%

“…Couto and Bastos-Netto [6] and Ibrahim and Przekwas [7] investigated the atomization characteristics of impinging jets experimentally. Ashgriz et al [8] investigated the mixing characteristics of sprays formed by the impingement of two water jets, and Lee et al [9] investigated the mixture composition distribution in asymmetric impinging jets using impinging jets formed by water and a sodium carbonate (Na 2 CO 3 ) solution of which the mixture composition distribution was measured with an acid-base titration technique. Jung [10] et al measured the mass concentration and mass flux of the impinging jets using the PLIF technique.…”

Section: Introductionmentioning

confidence: 99%

An experimental study on the distribution of the drop size and velocity in asymmetric impinging jet sprays

Lee

2008

J Mech Sci Technol

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Distributions of the drop size and velocity in an asymmetric impinging jet are investigated by injecting water and a sodium carbonate (Na 2 CO 3 ) solution, which simulates the mixing process in impinging jet sprays of liquid oxidizer and liquid fuel for liquid propellants. The liquid sheet formed from the impinging jet is visualized and the drop size distributions are obtained by using image processing for the visualized images. The drop size distribution of the asymmetric impinging jets is fitted to the Rosin-Rammler distribution function. The obtained drop size distributions according to the azimuth angle in the impinging jet are compared with the theoretical predictions of previous research. The experimental results of the drop size distributions are located between the two curves obtained from the theoretical predictions by treating each jet in the asymmetric impinging jets as an independent wall-impinging jet. PIV images using a double-exposure method were processed to obtain the drop velocity vector in the impinging jets. Whether the drops shedding from the edge of the asymmetric impinging jets occurs radially or tangentially is also investigated from the PIV results.

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“…We > 10000) will lead to zero sheet breakup length and ligament breakup length.Liquid Droplet Diameter And Distribution. Lee et al[6] derived the theoretical distribution of the liquid sheet thickness h for the symmetric impinging jets:sin exp[(1…”

mentioning

confidence: 99%

Primary Atomization Implementation of Unlike-Doublet Impinging Jets in Numerical Simulation

Feng¹,

Huang²,

Li³

et al. 2015

Proceedings of the 3rd International Conference on Advances in Energy and Environmental Science 2015

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Unlike-doublet impinging jets are frequently used for liquid fuel and oxidizer atomization inside small rocket engines. An accurate setup for the primary atomization of impinging jets is crucial for combustion simulation accuracy. Spray location, spray angle, spray flow rate angular distribution, droplet diameter distribution, deviation angle, and dispersion angle are involved in the implementation of primary atomization setup. Appropriate physical models for these parameters have been identified and implemented in the CFD simulation of a test rocket engine using monomethylhydrazine and nitrogen tetroxide.

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An Experiment on Flow Distribution and Mixing in Impinging Jet Sprays

Cited by 8 publications

References 0 publications

Mixing Analysis of Like Doublet Injectors in High Pressure Environments for Gelled Propellant Simulants

Mixing Analysis of Like Doublet Injectors in High Pressure Environments for Gelled Propellant Simulants

An experimental study on the distribution of the drop size and velocity in asymmetric impinging jet sprays

Primary Atomization Implementation of Unlike-Doublet Impinging Jets in Numerical Simulation

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