Combustion Characteristics of Ethanol/Liquid-Oxygen Rocket-Engine Combustor with Planar Pintle Injector
Combustion Characteristics of Ethanol/Liquid-Oxygen Rocket-Engine Combustor with Planar Pintle Injector
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DOI：
10.2514/1.b36144
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发表时间：
2017-03
影响因子：
1.9
通讯作者：
Kazuki Sakaki;Hiromitsu Kakudo;S. Nakaya;M. Tsue;Kyohei Suzuki;R. Kanai;Takahiro Inagawa;T. Hiraiwa
中科院分区：
文献类型：
--
作者：
Kazuki Sakaki;Hiromitsu Kakudo;S. Nakaya;M. Tsue;Kyohei Suzuki;R. Kanai;Takahiro Inagawa;T. Hiraiwa
The pintle injector is a promising candidate for propellant-injection systems for various rocket engines. However, fundamental studies focusing on the pintle injector are rather limited, and the effects of key design parameters on combustion behaviors of the injector are still not identified. Therefore, combustion tests of an ethanol/liquid-oxygen rocket-engine combustor with a planar pintle injector are conducted to investigate the effects of total momentum ratio and O/F on the combustion characteristics of the pintle injector. The total momentum ratio and O/F vary from 1.0 to 2.2 and from 0.32 to 3.65, respectively, whereas the combustion pressure is kept constant at approximately 0.4 MPa. The spray structures are observed with high-speed cameras. The characteristic exhaust velocity (C*) efficiency increases with the increase in O/F in the fuel-centered configuration, and the opposite tendency is observed in the oxidizer-centered configuration. The C* efficiency decreases with the increase in the total ...
