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http://dx.doi.org/10.6108/KSPE.2022.26.1.047

Spray Characteristics of Additive Manufactured Swirl Coaxial Injectors with Different Recess Lengths  

Ahn, Jonghyeon (School of Mechanical Engineering, Chungbok National University)
Lim, Ha Young (Launcher Propulsion Control Team, Korea Aerospace Research Institute)
Ahn, Kyubok (School of Mechanical Engineering, Chungbok National University)
Publication Information
Journal of the Korean Society of Propulsion Engineers / v.26, no.1, 2022 , pp. 47-59 More about this Journal
Abstract
Four swirl coaxial injectors with different recess lengths were manufactured using an additive manufacturing method. Single-injection and bi-injection cold-flow experiments were performed using water and air as simulated propellants in an atmospheric pressure environment. According to the recess length and propellant flow conditions, the injection pressure drop and discharge coefficient were investigated, and the breakup length and spray angle were measured using an image processing technique. In the bi-injection pressure drop and discharge coefficient results, the liquid-side injector was not affected by the recess. For the gas-side injector, however, the injection pressure drop increased and the discharge coefficient decreased as the recess length increased. The breakup length in the single-injection increased with the increase of the recess, but decreased in the bi-injection.
Keywords
Additive Manufacturing; Swirl Coaxial Injector; Recess Length; Spray Characteristics;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
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