Experimental study on combustion mode transition effects in a strut-based scramjet combustor

Qingchun Yang; Jichao Hu; Juntao Chang; Youhai Zong; Wen Bao

doi:10.1177/0954410014539288

Experimental study on combustion mode transition effects in a strut-based scramjet combustor

Qingchun Yang
, Jichao Hu
, Juntao Chang
, Youhai Zong
, Wen Bao^*

^*Corresponding author for this work

School of Energy Science and Engineering, Harbin Institute of Technology

Research output: Contribution to journal › Article › peer-review

18 Scopus citations

Abstract

A strut-based scramjet combustor was operated in three different combustion modes under Mach 2.5 inflow conditions, scramjet mode, weak ramjet mode, and strong ramjet mode. The combustion mode transition effects are investigated through ground experiments. The scramjet mode occurred below the overall fuel equivalence ratio of around 0.44. Transition from the scramjet mode to the weak ramjet mode occurred at ER ∼ 0.44, accompanied by a sudden increase in thrust. By contrast, transition from the weak ramjet mode to strong ramjet mode occurred at ER ∼ 0.6125, accompanied by a sudden decrease in thrust. In particularly, combustion mode transitions significantly change the dominant characteristics of the flow field.

Original language	English
Pages (from-to)	764-771
Number of pages	8
Journal	Proceedings of the Institution of Mechanical Engineers, Part G: Journal of Aerospace Engineering
Volume	229
Issue number	4
DOIs	https://doi.org/10.1177/0954410014539288
State	Published - 16 Mar 2015
Externally published	Yes

Keywords

Scramjet combustor
combustion mode transition
flow field
sudden change
thrust

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10.1177/0954410014539288

Cite this

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title = "Experimental study on combustion mode transition effects in a strut-based scramjet combustor",

abstract = "A strut-based scramjet combustor was operated in three different combustion modes under Mach 2.5 inflow conditions, scramjet mode, weak ramjet mode, and strong ramjet mode. The combustion mode transition effects are investigated through ground experiments. The scramjet mode occurred below the overall fuel equivalence ratio of around 0.44. Transition from the scramjet mode to the weak ramjet mode occurred at ER ∼ 0.44, accompanied by a sudden increase in thrust. By contrast, transition from the weak ramjet mode to strong ramjet mode occurred at ER ∼ 0.6125, accompanied by a sudden decrease in thrust. In particularly, combustion mode transitions significantly change the dominant characteristics of the flow field.",

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T1 - Experimental study on combustion mode transition effects in a strut-based scramjet combustor

AU - Yang, Qingchun

AU - Hu, Jichao

AU - Chang, Juntao

AU - Zong, Youhai

AU - Bao, Wen

N1 - Publisher Copyright: © IMechE 2014 Reprints and permissions: sagepub.co.uk/journalsPermissions.nav.

PY - 2015/3/16

Y1 - 2015/3/16

N2 - A strut-based scramjet combustor was operated in three different combustion modes under Mach 2.5 inflow conditions, scramjet mode, weak ramjet mode, and strong ramjet mode. The combustion mode transition effects are investigated through ground experiments. The scramjet mode occurred below the overall fuel equivalence ratio of around 0.44. Transition from the scramjet mode to the weak ramjet mode occurred at ER ∼ 0.44, accompanied by a sudden increase in thrust. By contrast, transition from the weak ramjet mode to strong ramjet mode occurred at ER ∼ 0.6125, accompanied by a sudden decrease in thrust. In particularly, combustion mode transitions significantly change the dominant characteristics of the flow field.

AB - A strut-based scramjet combustor was operated in three different combustion modes under Mach 2.5 inflow conditions, scramjet mode, weak ramjet mode, and strong ramjet mode. The combustion mode transition effects are investigated through ground experiments. The scramjet mode occurred below the overall fuel equivalence ratio of around 0.44. Transition from the scramjet mode to the weak ramjet mode occurred at ER ∼ 0.44, accompanied by a sudden increase in thrust. By contrast, transition from the weak ramjet mode to strong ramjet mode occurred at ER ∼ 0.6125, accompanied by a sudden decrease in thrust. In particularly, combustion mode transitions significantly change the dominant characteristics of the flow field.

KW - Scramjet combustor

KW - combustion mode transition

KW - flow field

KW - sudden change

KW - thrust

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DO - 10.1177/0954410014539288

M3 - 文章

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SN - 0954-4100

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JO - Proceedings of the Institution of Mechanical Engineers, Part G: Journal of Aerospace Engineering

JF - Proceedings of the Institution of Mechanical Engineers, Part G: Journal of Aerospace Engineering

IS - 4

ER -

Experimental study on combustion mode transition effects in a strut-based scramjet combustor

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