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Macroscopic Breakup Characteristics of Water Gel Simulants with Triplet Impinging Spray Jet  

Hwang, Tae-Jin (한국항공대학교 대학원)
Lee, In-Chul (한국항공대학교 대학원)
Koo, Ja-Ye (한국항공대학교 항공우주및기계공학부)
Publication Information
Journal of ILASS-Korea / v.15, no.3, 2010 , pp. 109-114 More about this Journal
Abstract
The implementation of gelled propellants systems offers high performance, energy management of liquid propulsion, storability, and high density impulse of solid propulsion. The present study focused on the macroscopic spray characteristics of liquid sheets formed by triplet impinging jets of non-Newtonian liquids which are mixed by Carbopol 941 0.5%wt. The results are compared to experiments conducted on spray images which formed by triplet impinging jets concerning with airassist effect at center orifice. When gel propellants are injected by doublet impinging jets at low pressure and high pressure, closed rim pattern shape appeared by polymeric effect from molecular force and showed inactive atomization characteristics, because of extensional viscosity related by restriction of atomization process and breakup time delay of turbulence transition. As increasing mass flow rate of the air(increasing GAR), spray breakup level is also increased.
Keywords
Gel Simulants; Triplet Impinging Injector; Polymeric effect; Spray Angle;
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