An experimental study was conducted that explored the effects of oxidizers on solid fuel combustion characteristics. A counterflow diffusion flame experiment was used to explore the combustion characteristics of hydroxyl-terminated polybutadiene with nitrous oxide, gaseous oxygen, or heated air. Solid fuel regression rates were measured with all three oxidizers for comparison purposes. When using air as the oxidizer, the air was heated by an air gun to as high as 813 K to explore temperature effects. For a given flow rate, regression rates were highest for oxygen, followed by nitrous oxide and heated air, respectively. It was found that regression rate was more sensitive to oxidizer impingement velocity, and therefore strain rate, than to oxidizer temperature alone in the counterflow environment. Oxygen concentration in each oxidizer was shown to play a key role in the fuel regression rate. This is largely attributed to the oxidizer composition, which influences the measured fuel regression rate by affecting the stoichiometry, the adiabatic flame temperature, and location of the diffusion flame relative to the pyrolyzing fuel surface. High-speed imaging allowed for viewing of the burning surface and the location of the flame, which helped to provide further understanding of the combustion characteristics of the fuel with each oxidizer.
Effect of Oxidizer Type on Solid Fuel Combustion
Journal of Propulsion and Power ; 36 , 2 ; 248-255
2019-12-24
8 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
Combustion Behavior of Solid Oxidizer/Gaseous Fuel Diffusion Flames
British Library Conference Proceedings | 2012
|Combustion Behavior of Solid Oxidizer/Gaseous Fuel Diffusion Flames
Online Contents | 2013
|