Supersonic combustion with Supersonic injection through diamond-shaped orifices

S. Tomioka, T. Kohchi, R. Masumoto, M. Izumikawa, Akiko Matsuo

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

Supersonic injection through a diamond-shaped injector was applied to a direct-connect supersonic combustor with a diverging section, and mixing/combustion characteristics were experimentally investigated in a Mach 2.4 vitiated airflow at a total temperature of 2000 K, and were compared with those with sonic injection through a circular injector. Without any flame-holding devices installed, scramjet-mode combustion was attained in a wide range of fuel flow rate, in which supersonic injection through the diamond-shaped orifice resulted in slightly larger pressure rise in far field than sonic injection through the circular orifice. Regardless of the injection schemes (i.e., the orifice shape and the injection conditions), occurrence of pressure rise around the injector and resulting injectant plume/oblique shock train interaction drastically changed mixing characteristics and enhanced thrust production, and mixing characteristics became less sensitive to the injection schemes. They became almost insensitive to the injection schemes indual-mode combustion. The supersonic injection through the diamond-shaped orifice had lesser abilitytoattain the pressure riseinnearfield than sonic injection through the circular orifice, however, the ability was enhanced by installation of a cavity and introduction of cavity fueling.

Original languageEnglish
Pages (from-to)1196-1203
Number of pages8
JournalJournal of Propulsion and Power
Volume27
Issue number6
DOIs
Publication statusPublished - 2011 Nov

Fingerprint

supersonic combustion
orifices
Orifices
diamond
Diamonds
combustion
diamonds
injection
cavity
airflow
train
injectors
thrust
plume
Fueling
Combustors
Mach number
Flow rate
fuel flow
supersonic combustion ramjet engines

ASJC Scopus subject areas

  • Aerospace Engineering
  • Space and Planetary Science
  • Fuel Technology
  • Mechanical Engineering

Cite this

Supersonic combustion with Supersonic injection through diamond-shaped orifices. / Tomioka, S.; Kohchi, T.; Masumoto, R.; Izumikawa, M.; Matsuo, Akiko.

In: Journal of Propulsion and Power, Vol. 27, No. 6, 11.2011, p. 1196-1203.

Research output: Contribution to journalArticle

Tomioka, S. ; Kohchi, T. ; Masumoto, R. ; Izumikawa, M. ; Matsuo, Akiko. / Supersonic combustion with Supersonic injection through diamond-shaped orifices. In: Journal of Propulsion and Power. 2011 ; Vol. 27, No. 6. pp. 1196-1203.
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