Results 101 to 110 of about 2,865 (193)

The Effects of Parameter Settings on Triggering Time and Climb Rate during Lean-Premixed Combustion Thermoacoustic Oscillations

Applied Sciences
This study theoretically explored the effects of parameter settings on thermoacoustic oscillations with a low-order model. Three factors were explored—combustor length, inlet gas temperature and thermal power.
Chengfei Tao, Rongyue Sun, Yichen Wang, Liang Zhang, Jiangming Ye, Shaohua Liang   +5 more
doaj   +1 more source

Thermoacoustic Interpretation of Second-Mode Instability

AIAA Journal, 2018
A thermoacoustic interpretation of Mack’s second-mode instability is proposed. It is demonstrated that the fundamental mechanism of second-mode wave growth in hypersonic boundary layers is consiste...
openaire   +1 more source

Analytical modeling of thermoacoustic instability influences in gas turbine combustors: A detailed parameter sensitivity analysis

Case Studies in Thermal Engineering
In this study, the effects of various system parameters on combustion instability were numerically identified through a network-based thermoacoustic model using the concept of a transfer function.
Seonyeong Kim, Daesik Kim
doaj   +1 more source

Time Series and Spectral Analysis of Thermoacoustic Oscillations for Propane-Oxyfuel Combustion in a Swirl-Stabilized, Nonpremixed Combustor. [PDF]

ACS Omega, 2023
Talal Q, Abubakar Z, Shakeel MR, AlSwat MS, Mokheimer EMA.   +4 more
europepmc   +1 more source

Modeling and control of thermoacoustic instabilities

, 2003
This work deals with modeling and control of thermoacoustic combustion instabilities in lean premixed combustion systems. Because of the complex interactions present in thermoacoustic systems, a network modeling approach is used. The model of each network element or subsystem is obtained analytically, numerically, or by making use of experimental ...
openaire   +1 more source

Causality and intrinsic thermoacoustic instability modes

, 2014
Direct numerical simulation of a confined laminar premixed flame has been performed in an anechoic combustor, showing self-sustained intrinsic thermoacoustic oscillations. Theoretical predictions based on acoustic jump relations and the n − τ model for the flame are presented and causality concerns are discussed.
Courtine, Emilien, Selle, Laurent, Nicoud, Franck, Polifke, Wolfgang, Silva, Camilo, Bauerheim, Michaël, Poinsot, Thierry   +6 more
openaire   +2 more sources

Analysis of Combustion Instability of Methane-Air Premixed Swirling Flame Based on OH-PLIF Measurements. [PDF]

ACS Omega, 2023
Deng K, Xue C, Liu Z, Hu J, Zhong Y.
europepmc   +1 more source

Fluid physics, thermodynamics, and heat transfer experiments in space [PDF]

An overstudy committee was formed to study and recommend fundamental experiments in fluid physics, thermodynamics, and heat transfer for experimentation in orbit, using the space shuttle system and a space laboratory.
Abramson, H. N., Angrist, S. W., Catton, I., Churchill, S. W., Dodge, F. T., Mannheimer, R. J., Otrach, S., Schwartz, S. H., Sengers, J. V.   +8 more
core   +1 more source

Exploring liquid fuel combustion dynamics in a swirl burner using dynamic mode decomposition

Engineering Applications of Computational Fluid Mechanics
Aero gas turbine engine combustors are transitioning from traditional Rich-Quench-Lean (RQL) staging to Lean Premixed Prevaporized (LPP) operation to reduce harmful NOx emissions and improve combustion efficiency.
Alireza Ghasemi, Jim B. W. Kok
doaj   +1 more source

Steady-state statistics, emergent patterns and intermittent energy transfer in a ring of oscillators. [PDF]

Nonlinear Dyn, 2022
Pedergnana T, Noiray N.
europepmc   +1 more source