Results 71 to 80 of about 1,003 (200)

Learning and Characterizing Chaotic Attractors of a Lean Premixed Combustor

Energies
This paper is about the characteristics of and a method to recognize the onset of limit cycle thermoacoustic oscillations in a gas turbine-like combustor with a premixed turbulent methane/air flame.
Sara Navarro-Arredondo, Jim B. W. Kok
doaj   +1 more source

Avoiding high frequency thermoacoustic instabilities in cyrogenic rocket engines using Bayesian deep learning

, 2020
Destructive high-frequency thermoacoustic instabilities have afflicted liquid propellant rocket engine development for decades. The 90 MW cryogenic liquid oxygen/hydrogen multi-injector research combustor BKD operated by DLR Lampoldshausen is a platform ...
Juniper, Matthew, Sengupta, Ushnish, Martin, Jan, Waxenegger-Wilfing Gunther, Hardi, Justin   +4 more
core   +1 more source

Study on thermoacoustic instabilities in an aircraft engine combustor using 1D network model

Case Studies in Thermal Engineering
The purpose of this study was to evaluate the combustion instability characteristics of target aircraft combustors under development using network thermoacoustic (TA) models.
Juchan Son, Seungchai Jung, Shaun Kim, Daesik Kim   +3 more
doaj   +1 more source

Experimental Investigation of Thermoacoustics and High-Frequency Combustion Dynamics with Band Stop Characteristics in a Pressurized Combustor

Energies
In combustor systems, thermoacoustic instabilities may occur and must be avoided for reliable operation. An acoustic network model can be used to predict the eigenfrequencies of the instabilities and the growth rate by incorporating the combustion ...
Mehmet Kapucu, Jim B. W. Kok, Artur K. Pozarlik   +2 more
doaj   +1 more source

Non-linearities in the thermoacoustic response of a premixed swirl burner

, 2009
PhDLean premixed combustion remains one of the simplest and most effective methods of reducing NOx emissions in industrial gas turbines. Lean premixed flames are however prone to an undesirable side effect known as combustion instability, reducing ...
Hosseini, S. M. Reza, Hosseini, S M Reza
core  

Review of acoustic field effects on flame dynamics and combustion applications

International Journal of Coal Science & Technology
Acoustic-flame coupling technology is an interdisciplinary frontier field investigating the complex interactions between sound waves and combustion. Generally, the acoustic field can be divided into two modes based on its relative position to the flame ...
Zhiwei Su, Yaoyao Ying, Dong Liu
doaj   +1 more source

Boundaries of thermoacoustic instability in the thermoacoustic engine with cryogenic cooling [PDF]

Journal International Academy of Refrigeration, 2020
E.A. Zinoviev, G.V. Vorotnikov, A.I. Dovgyallo, S.O. Nekrasova   +3 more
openaire   +1 more source

MODELING AND ACTIVE CONTROL OF THERMOACOUSTIC INSTABILITIES

IFAC Proceedings Volumes, 2005
Abstract Due to stringent emission regulations, modern gas turbines work in lean premixed mode and thermoacoustic instabilities are often observed. They cause mechanical damage and therefore have to be reduced. This paper describes the development of an acoustic network model for a lab-scale lean premixed methane combustor at ETH Zurich. The model is
André S.P. Niederberger, Bruno B.H. Schuermans, Lino Guzzella   +2 more
openaire   +1 more source

Sound generation and control of thermoacoustic instabilities by nanosecond plasma discharges

, 2016
Sound generation by nanosecond repetitively pulsed plasma discharges is investigated experimentally. High voltage pulses of 10 nanosecond duration provide rapid heating of the air.
Bölke, Olaf, Lacoste, Deanna, Moeck, Jonas P.   +2 more
core  

Numerical and Theoretical Modeling of Thermoacoustic Instabilities in Transcritical Fluids

, 2018
Enhancements of gas turbine engines efficiency are critical for the development of the next generation of clean and efficient aircraft. With the increase in combustion temperatures, cooling of the turbine blades poses one of the most important thermal ...
Mario Tindaro Migliorino (5930039), Migliorino, Mario Tindaro   +1 more
core   +1 more source