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Fuel Regression Characteristics of Axial-Injection End-Burning Hybrid Rocket Using Nitrous Oxide

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Title: Fuel Regression Characteristics of Axial-Injection End-Burning Hybrid Rocket Using Nitrous Oxide
Authors: Okuda, Ryota Browse this author
Komizu, Kodai Browse this author
Tsuji, Ayumu Browse this author
Miwa, Takumi Browse this author
Fukada, Mai Browse this author
Yokobori, Shuichi Browse this author
Soeda, Kentaro Browse this author
Kamps, Landon Browse this author
Nagata, Harunori Browse this author →KAKEN DB
Keywords: Fuel Regression
Hybrid Rocket
Chamber Pressure
Mass Flow Rate
Exhaust Velocity
Fuel Consumption
Inlet Pressure
Hagen Poiseuille Flow
Needle Valve
Friction Coefficient
Issue Date: Sep-2022
Publisher: The American Institute of Aeronautics and Astronautics
Journal Title: Journal of propulsion and power
Volume: 38
Issue: 5
Start Page: 759
End Page: 770
Publisher DOI: 10.2514/1.B38318
Abstract: This is an investigation of fuel regression characteristics in an axial-injection end-burning hybrid rocket using nitrous oxide. Experiments were conducted using 38 mm cylindrical fuel grains with an array of 0.8 mm ports made from curable resin. Previous studies of end-burning hybrid rockets used gaseous oxygen as oxidizer. Nitrous oxide may be more suitable than gaseous oxygen for use in space-based missions because of the weight savings associated with the oxidizer storage vessels, supply system, and motor mass. In this study, two types of nozzle closures were employed to increase the initial chamber pressure and promote the formation of stabilized combustion in multiport fuels. The results of 12 firing tests showed that the regression rates when using nitrous oxide as the oxidizer were as high as that from previous research (0.61–4.5 mm/s at 0.25–0.75 MPa) using gaseous oxygen as the oxidizer. These high regression rates were nearly five times higher than that of experiments using single-port fuels. It is clear from a visualization experiment that fuel flakes break off and travel downstream in solid form during firing, which could cause the fuel regression rate of multiport fuels to be higher than that of single-port fuels.
Type: article (author version)
Appears in Collections:工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 永田 晴紀

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