Results 11 to 20 of about 34,611 (247)

Acoustic power measurements of oscillating flames [PDF]

open access: yes, 1981
The acoustic power of an oscillating flame is measured. A turbulent premixed propane/air flame is situated near a pressure antinode of a standing wave in a laboratory combustion chamber. This standing wave is generated by a piston.
Valk, M.
core   +7 more sources

Numerical Study of Pipeline Distribution Effect on the Performance of Pasty Propellant Rocket Motor

open access: yesSpace: Science & Technology, 2023
This paper reports the numerical research on PPRM (pasty propellant rocket motor) through computational fluid dynamics simulation along with pipeline design comparison based on simulation results.
Renjie Hu, Weizong Wang
doaj   +1 more source

Simultaneous OH PLIF/Chemiluminescence and stereoscopic PIV measurements of combustion oscillation onset in turbulent swirling lean premixed flames

open access: yesJournal of Thermal Science and Technology, 2021
To yield an effective control to impede the progress of combustion oscillation and to lead to the development of completely stable combustors, it is necessary to reveal the mechanism of the destabilization.
Yuki ATAGI   +2 more
doaj   +1 more source

The role of chemistry in the oscillating combustion of hydrocarbons : an experimental and theoretical study [PDF]

open access: yes, 2020
The stable operation of low-temperature combustion processes is an open challenge, due to the presence of undesired deviations from steady-state conditions: among them, oscillatory behaviors have been raising significant interest.
Battin-Leclerc, Frédérique   +7 more
core   +2 more sources

Large Eddy Simulation and Dynamic Mode Decomposition of Supersonic Combustion Instability in a Strut-Based Scramjet Combustor

open access: yesAerospace, 2023
Supersonic combustion instability studies are crucial for the future maturation of scramjet engines. In the present paper, the supersonic combustion instability in a strut-based scramjet combustor is investigated through large eddy simulation and dynamic
Yuwei Cheng   +3 more
doaj   +1 more source

A mechanism for high-frequency oscillation in ramjet combustors and afterburners [PDF]

open access: yes, 1956
An experimental investigation was made of the behavior of a small two-dimensional combustion chamber, burning a uniform mixture of air and fuel vapor under conditions of high-frequency oscillation or screech.
Marble, Frank E., Rogers, Don E.
core   +1 more source

Robust Gas Turbine Combustor with Acoustic Liner

open access: yesJournal of Thermal Science and Technology, 2012
Combustion oscillation of a self-excited thermo-acoustic phenomenon occurs inside the gas turbine combustor. Its excessive pressure fluctuation may impair the gas turbine engine operation, and could result in hardware severe damages.
Kazufumi IKEDA   +2 more
doaj   +1 more source

Estimation of combustion efficiency range and pressure fluctuation at low working condition

open access: yesEnergy Reports, 2022
The exact data of combustion efficiency are rare in the open literature near the ignition and at sub-idle, especially at the state close to the lean blowout limit, due to the complexity of combustion characteristics and inconvenience of measurement in ...
Yixiang Yuan   +6 more
doaj   +1 more source

The Impacts of Three Flamelet Burning Regimes in Nonlinear Combustion Dynamics [PDF]

open access: yes, 2018
Axisymmetric simulations of a liquid rocket engine are performed using a delayed detached-eddy-simulation (DDES) turbulence model with the Compressible Flamelet Progress Variable (CFPV) combustion model.
Nguyen, Tuan, Sirignano, William A.
core   +2 more sources

Linear Instability Analysis Method with Three-Dimensional Finite Element Model of Lean Premixed Combustor

open access: yesJournal of Thermal Science and Technology, 2012
Combustion oscillation of a self-excited combustion-acoustic phenomenon occurs inside the gas turbine combustor. In general, excessive pressure fluctuation of combustion oscillation may impair the gas turbine engine operation and may result in hardware ...
Kazufumi IKEDA   +3 more
doaj   +1 more source

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