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ID 56130
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Author
Kouchi, Toshinori Graduate School of Natural Science and Technology
Masuya, Goro Tohoku University
Hirano, Kohshi Keio University
Matsuo, Akiko Keio University
Abstract
We developed a stinger-shaped injector (stinger injector) for supersonic combustors in cold-flow experiments. The stinger injector has a port geometry with a sharp leading edge in front of a streamwise slit. This injector produced higher jet penetration at a lower jet-tocrossflow momentum flux ratio (J) than a conventional circular injector. We applied the injector in a Mach 2.44 combustion test at a stagnation temperature of 2060 K. At a low fuel equivalence ratio (Φ) regime (i.e., low J regime), the injector produced 10% higher pressure thrust than the circular injector because of high jet penetration as expected from the coldflow experiments. Even at a moderate Φ regime, the stinger injector produced higher pressure thrust than the circular injector. At moderate Φ, the stinger injector held the flame around the injector and generated a precombustion shock wave in front of the injector. The presence of the precombustion shock wave decreased the momentum flux of the crossflow air and diminished the advantage of the injector for jet penetration. The injector, however, produced higher pressure thrust because better flame-holding produced higher pressure around the injector. At a higher Φ regime, the precombustion shock wave went upstream with both injectors. The far-upstream presence of a precombustion shock wave increased the turbulence in the crossflow and spread the fuel from both injectors. Thus, the difference in injector shape was insignificant for thrust performance
Note
This is an Accepted Manuscript of an article published by American Institute of Aeronautics and Astronautics
Published Date
2013
Publication Title
Journal of Propulsion and Power
Volume
volume29
Issue
issue3
Publisher
American Institute of Aeronautics and Astronautics
Start Page
639
End Page
647
ISSN
0748-4658
NCID
AA10459896
Content Type
Journal Article
language
英語
OAI-PMH Set
岡山大学
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isVersionOf https://doi.org/10.2514/1.B34524