Results 131 to 140 of about 372,349 (178)

Identification of a model for thermoacoustic instabilities in a Rijke tube

IEEE Transactions on Control Systems Technology, 2002
In a large class of processes characterized by the presence of a heating source placed in a finite volume, the interaction between the flow field and the heat release mechanism can lead to unsteady fluctuations, known as thermoacoustic instabilities.
Sergio Bittanti, Antonio De Marco, Guido Poncia, Walter Prandoni   +3 more
openaire   +2 more sources

Mathematical modeling of a generalized Rijke tube

International Journal of Engineering Science, 1998
A mathematical model of unsteady velocity sensitive thermoacoustic interactions in a heated duct (generalized Rijke tube) is developed. The model is constructed in a general way which is capable of employing any linear velocity sensitive thermoacoustic response model. A solution methodology is then constructed based on modal analysis.
Hyun-Gull Yoon, John Peddieson, Kenneth R. Purdy   +2 more
openaire   +1 more source

Backstepping stabilization of a linearized ODE–PDE Rijke tube model

Automatica, 2018
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Gustavo Artur de Andrade, Daniel Pagano
exaly   +3 more sources

Thermoacoustic Instability in a Rijke Tube: Non-Normality and Nonlinearity

13th AIAA/CEAS Aeroacoustics Conference (28th AIAA Aeroacoustics Conference), 2007
The role of non-normality and nonlinearity in thermoacoustic interaction in a Rijke tube is investigated in this paper. The heat release rate of the heating element is modeled by a modified form of King’s law. This fluctuating heat release from the heating element is treated as a compact source in the one-dimensional linear model of the acoustic field.
Balasubramanian, Koushik, Sujith, R. I.
openaire   +1 more source

Experiments on heat content inside a Rijke tube with suppression of thermo-acoustics instability

International Journal of Spray and Combustion Dynamics, 2017
The present work describes the occurrence of thermo-acoustic instability inside a horizontal Rijke tube and its suppression using an open loop active control technique. The Rijke tube is provided with a co-axial pre-mixed gas burner as the source of heat,
Nilaj Deshmukh
exaly   +2 more sources

Modeling of Unstable Regimes in a Rijke Tube

5th International Symposium on Fluid Structure Interaction, Aeroelasticity, and Flow Induced Vibration and Noise, 2002
In the ducts with mean flows and heat sources, excitation of acoustic eigen modes is possible when unsteady heat release is coupled with pressure perturbations. The simplest device for studying the fundamental principles of thermoacoustic instabilities in the presence of a mean flow is a Rijke tube.
K. I. Matveev, F. E. C. Culick
openaire   +1 more source

The Rijke tube — A thermo-acoustic device

Resonance, 2003
The Rijke tube is simply a cylindrical tube with both ends openand a heat source placed inside it. The heat source may be aflame or an electrical heating element. Traditionally, the tube ispositioned vertically on a stand (or even in your hand) and theheat source is introduced from below into the tube (
Shekhar M Sarpotdar, N Ananthkrishnan, S D Sharma   +2 more
openaire   +1 more source

Electroacoustic control of Rijke tube instability

Journal of Sound and Vibration, 2017
Abstract Unsteady heat release coupled with pressure fluctuation triggers the thermoacoustic instability which may damage a combustion chamber severely. This study demonstrates an electroacoustic control approach of suppressing the thermoacoustic instability in a Rijke tube by altering the wall boundary condition.
Yumin Zhang, Lixi Huang
openaire   +1 more source

One-dimensional model for the Rijke tube

Journal of Fluid Mechanics, 1989
We develop a simple model in which longitudinal, compressible, unsteady heat transfer between heater and gas is computed in the small-Mach-number limit. This calculation is used to determine the transfer function of the heater, which plays an important role in the stability limits of the thermoacoustic instability of the Rijke tube.
Nicoli, C., Pelcé, P.
openaire   +2 more sources

Active control of the noise from a rijke tube

Journal of Sound and Vibration, 1986
Instabilities caused by flames or other heat sources in resonators can be suppressed with a feedback system. It consists of a microphone inside the resonator, a phase-shifter, an amplifier and a loudspeaker at one end of the resonator. The pressure field produced by the loudspeaker changes the boundary conditions at the end of the resonator.
openaire   +1 more source