Effects of Injection Conditions on Flame Structures in Gas-Centered Swirl Coaxial Injector
The objective of this paper is to observe the effects of injection conditions on flame structures in gas-centered swirl coaxial injector. Gaseous oxygen and liquid kerosene were used as propellants. For different injection conditions, two types of injector, which only differ in the diameter of the tangential inlet, were used in this study. In addition, oxidizer injection pressure was varied to control the combustion chamber pressure in different types of injector. In order to analyze the combustion instability intensity, the dynamic pressure was measured in both the combustion chamber and propellants lines. With the increase in differential pressure between the propellant injection pressure and the combustion chamber pressure, the combustion instability intensity increased. In addition, the flame structure was recorded using a high-speed camera to detect CH* chemiluminescence intensity. With the change in the injection conditions in the gas-centered swirl coaxial injector, the flame structure changed.
Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1317316Procedia APA BibTeX Chicago EndNote Harvard JSON MLA RIS XML ISO 690 PDF Downloads 399
 G. P. Sutton, “History of liquid-propellant rocket engines in the United States,” J. Propuls. Power, vol. 19 pp. 978-1007, Nov. 2003.
 D. R. Ballal, and A. H. Lefebvre, “Ignition of liquid fuel sprays at subatmospheric pressures,” Comb. Flame, vol. 31, pp. 115-126, 1978.
 T. Lieuwen, H. Torres, and B. T. Zinn, “A mechanism of combustion instability in lean premixed gas turbine combustors,” J. Eng. Gas Turbines Power, vol. 123, pp. 182-189, 2000.
 R. S. Fry, and M. D. Klem, “Guidelines for combustion stability specifications and verification procedures for liquid propellant rocket engines,” CPLA Publication, 655.
 S. Wooseok, K. Dohun, L. Keonwoong, S. Bongchul, K. Sangho, and K. Jaye, “Effects of kerosene heating on dynamic characteristics of GOx/kerosene combustor,” Acta Astronaut, vol. 126, pp. 528-535, 2016.