Physical insight into fuel/air mixing with hypermixer injectors for scramjet engines

Hideaki Ogawa, Masatoshi Kodera

研究成果: ジャーナルへの寄稿記事

抄録

Efficient mixing of fuel and air is a major objective for the successful operation of scramjet engines, in which the supersonic combustion process must occur within an extremely short time frame in the hypersonic flight. This paper presents the insights gained into the key design factors and underlying mechanism for fuel/air mixing enhancement with streamwise vortices introduced by alternating wedges called hypermixers. The results of a parametric numerical study and sensitivity analysis suggest that narrow spanwise intervals between the alternating wedges and large fuel/air equivalence ratios are beneficial for effective mixing, while higher total pressure recovery is associated with shallower ramp angles and lower fuel/air equivalence ratios. Higher fuel penetration is achieved with steeper ramp angles and higher fuel/air equivalence ratios. Streamwise vortex circulation increases with wider spanwise spacing and steeper ramp angles, but effective mixing enhancement is observed only in the latter case.

元の言語英語
ページ(範囲)1423-1435
ページ数13
ジャーナルJournal of Propulsion and Power
38
発行部数6
DOI
出版物ステータス出版済み - 1 1 2015
外部発表Yes

Fingerprint

Scramjet
supersonic combustion ramjet engines
Injector
injectors
engine
Engine
Engines
air
Air
ramps
equivalence
Equivalence
Wedge
Angle
wedges
vortex
Vortex
Vortex flow
Supersonic Combustion
Enhancement

All Science Journal Classification (ASJC) codes

  • Control and Systems Engineering
  • Aerospace Engineering
  • Space and Planetary Science
  • Electrical and Electronic Engineering
  • Applied Mathematics

これを引用

Physical insight into fuel/air mixing with hypermixer injectors for scramjet engines. / Ogawa, Hideaki; Kodera, Masatoshi.

:: Journal of Propulsion and Power, 巻 38, 番号 6, 01.01.2015, p. 1423-1435.

研究成果: ジャーナルへの寄稿記事

@article{4cef6619d513490789b71cdfc453083d,
title = "Physical insight into fuel/air mixing with hypermixer injectors for scramjet engines",
abstract = "Efficient mixing of fuel and air is a major objective for the successful operation of scramjet engines, in which the supersonic combustion process must occur within an extremely short time frame in the hypersonic flight. This paper presents the insights gained into the key design factors and underlying mechanism for fuel/air mixing enhancement with streamwise vortices introduced by alternating wedges called hypermixers. The results of a parametric numerical study and sensitivity analysis suggest that narrow spanwise intervals between the alternating wedges and large fuel/air equivalence ratios are beneficial for effective mixing, while higher total pressure recovery is associated with shallower ramp angles and lower fuel/air equivalence ratios. Higher fuel penetration is achieved with steeper ramp angles and higher fuel/air equivalence ratios. Streamwise vortex circulation increases with wider spanwise spacing and steeper ramp angles, but effective mixing enhancement is observed only in the latter case.",
author = "Hideaki Ogawa and Masatoshi Kodera",
year = "2015",
month = "1",
day = "1",
doi = "10.2514/1.B35638",
language = "English",
volume = "38",
pages = "1423--1435",
journal = "Journal of Propulsion and Power",
issn = "0748-4658",
publisher = "American Institute of Aeronautics and Astronautics Inc. (AIAA)",
number = "6",

}

TY - JOUR

T1 - Physical insight into fuel/air mixing with hypermixer injectors for scramjet engines

AU - Ogawa, Hideaki

AU - Kodera, Masatoshi

PY - 2015/1/1

Y1 - 2015/1/1

N2 - Efficient mixing of fuel and air is a major objective for the successful operation of scramjet engines, in which the supersonic combustion process must occur within an extremely short time frame in the hypersonic flight. This paper presents the insights gained into the key design factors and underlying mechanism for fuel/air mixing enhancement with streamwise vortices introduced by alternating wedges called hypermixers. The results of a parametric numerical study and sensitivity analysis suggest that narrow spanwise intervals between the alternating wedges and large fuel/air equivalence ratios are beneficial for effective mixing, while higher total pressure recovery is associated with shallower ramp angles and lower fuel/air equivalence ratios. Higher fuel penetration is achieved with steeper ramp angles and higher fuel/air equivalence ratios. Streamwise vortex circulation increases with wider spanwise spacing and steeper ramp angles, but effective mixing enhancement is observed only in the latter case.

AB - Efficient mixing of fuel and air is a major objective for the successful operation of scramjet engines, in which the supersonic combustion process must occur within an extremely short time frame in the hypersonic flight. This paper presents the insights gained into the key design factors and underlying mechanism for fuel/air mixing enhancement with streamwise vortices introduced by alternating wedges called hypermixers. The results of a parametric numerical study and sensitivity analysis suggest that narrow spanwise intervals between the alternating wedges and large fuel/air equivalence ratios are beneficial for effective mixing, while higher total pressure recovery is associated with shallower ramp angles and lower fuel/air equivalence ratios. Higher fuel penetration is achieved with steeper ramp angles and higher fuel/air equivalence ratios. Streamwise vortex circulation increases with wider spanwise spacing and steeper ramp angles, but effective mixing enhancement is observed only in the latter case.

UR - http://www.scopus.com/inward/record.url?scp=84961798948&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84961798948&partnerID=8YFLogxK

U2 - 10.2514/1.B35638

DO - 10.2514/1.B35638

M3 - Article

AN - SCOPUS:84961798948

VL - 38

SP - 1423

EP - 1435

JO - Journal of Propulsion and Power

JF - Journal of Propulsion and Power

SN - 0748-4658

IS - 6

ER -