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ISSN Печать: 2150-766X
ISSN Онлайн: 2150-7678
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MIXING LENGTH SCALE OF BI-PROPELLANT THRUSTERS FOR CHARACTERISTIC VELOCITY FORMULATION
Краткое описание
Bi-propellant thrusters in space propulsion systems often utilize unlike-doublet or triplet injectors as the hypergolic propellant injection device. The impingement of liquid jet streams of fuel and oxidizer involves sheet expansion, droplet fragmentation, mixing, evaporation, and chemical reactions in liquid and gas phases. In the sequential reactive, multiphase, thermo-fluid dynamics, the rate controlling phenomenon is the mixing step. In this study, a defined length scale demonstrates the distribution of fuel and oxidizer and thus represents their mixing states, facilitating the straightforward formulation of characteristic velocity in a consistent manner for doublet and triplet injectors as a function of propellant injection conditions with a film cooling effect. The validity of the present modeling framework is confirmed by a good agreement with characteristic velocity measured by hot firing tests covering a wide range of the mixture ratio. We also clarify the meaning of a widely accepted practical indicator, the so-called Rupe factor, over half a century of injector design history.
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Fujii Go, Daimon Yu, Inoue Chihiro, Shiraiwa Daijiro, Tanaka Nobuhiko, Furukawa Katsumi, Visualization of Pulse Firing Mode in Hypergolic Bipropellant Thruster, Journal of Propulsion and Power, 36, 5, 2020. Crossref
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Inoue Chihiro, Oishi Yuki, Terauchi Yuto, Daimon Yu, Fujii Go, Kawatsu Kaname, Direct Formulation and Quantitative Water-Flow Diagnostic for Bi-Propellant Thruster Performance, AIAA Propulsion and Energy 2020 Forum, 2020. Crossref
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Inoue Chihiro, Oishi Yuki, Daimon Yu, Fujii Go, Kawatsu Kaname, Direct Formulation of Bipropellant Thruster Performance for Quantitative Cold-Flow Diagnostic, Journal of Propulsion and Power, 37, 6, 2021. Crossref
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Inoue Chihiro, Maeda Ikkan, Fujii Go, Daimon Yu, Evaporation of Three-Dimensional Wavy Liquid Film Entrained by Turbulent Gas Flow, AIAA Propulsion and Energy 2021 Forum, 2021. Crossref