Combustion instability sustained by unsteady vortex combustion [PDF]
21st Joint Propulsion Conference, 1985 The determination of an internal feedback mechanism which leads to combustion instability inside a small scale laboratory combustor is presented in this paper. During combustion instability, the experimental findings show that a large vortical structure is formed at an acoustic resonant mode of the system.
Smith, D. A., Zukoski, E. E.
openaire +4 more sources
Pulsating regimes of flames propagation in a model with chain-branching reaction [PDF]
Компьютерные исследования и моделирование, 2009 In this paper we investigate propagation of planar combustion waves in an adiabatic model with two-step chain branching reaction mechanism. Pulsating instabilities are found to emerge for fuel Lewis number greater than one due to a Hopf bifurcation.
V. V. Gubernov +2 more
doaj +1 more source
Energy and AI, 2021 The intermittent nature of operation and unpredictable availability of renewable sources of energy (e.g., wind and solar) would require the combustors in fossil-fuel power plants, sharing the same grid, to operate with large turn-down ratios. This brings
Sudeepta Mondal +3 more
doaj +1 more source
Using LES to Study Reacting Flows and Instabilities in Annular Combustion Chambers [PDF]
, 2012 Great prominence is put on the design of aeronautical gas turbines due to increasingly stringent regulations and the need to tackle rising fuel prices.
A Giauque +36 more
core +4 more sources
Numerical Analysis of Self-Excited Combustion Instabilities in a Small MMH/NTO Liquid Rocket Engine
International Journal of Aerospace Engineering, 2020 Combustion instabilities in a small MMH/NTO liquid rocket engine used for satellite attitude and course control are numerically investigated. A three-dimensional Navier-Stokes code is developed to simulate two-phase spray combustion for cases with five ...
Jianxiu Qin, Huiqiang Zhang
doaj +1 more source
Experimental Investigation of Flame Anchoring Behavior in a LOX/LNG Rocket Combustor
Aerospace, 2023 Hot fire tests of a multi-injector research combustor were performed with liquid-oxygen and liquefied-natural-gas (LOX/LNG) propellants at chamber pressures from 30 up to 67 bar, hence at conditions similar to an upper stage rocket engine.
Jan Martin +4 more
doaj +1 more source
Combustion instabilities: mating dance of chemical, combustion, and combustor dynamics [PDF]
, 2000 Combustion instabilities exist as consequences of interactions among three classes of phenomena: chemistry and chemical dynamics; combustion dynamics; and combustor dynamics.
Culick, F. E. C.
core +1 more source
Effect of ramp-cavity on hydrogen fueled scramjet combustor
Propulsion and Power Research, 2014 Sustained combustion and optimization of combustor are the two challenges being faced by combustion scientists working in the area of supersonic combustion.
J.V.S. Moorthy +3 more
doaj +1 more source
Some dynamics of acoustic oscillations with nonlinear combustion and noise [PDF]
, 1997 The results given in this paper constitute a continuation of progress with nonlinear analysis of coherent oscillations in combustion chambers. We are currently focusing attention on two general problems of nonlinear behavior important to practical ...
Burnley, V. S., Culick, F. E. C.
core +1 more source
Cycle-Resolved Computations of Stratified-Charge Turbulent Combustion in Direct Injection Engine
Journal of Thermal Science and Technology, 2013 An extremely lean burning engine has been expected to improve fuel consumption rate of engines. To achieve this, stable combustion should be realized for a wide range of operating conditions at air-fuel ratio over 40.0.
Nobuhiro SHINMURA +2 more
doaj +1 more source