Editorial for the special JSV issue in memory of Shôn Ffowcs Williams
(2023)
Journal Article
All Outputs (26)
The effects of different types of noise on thermoacoustic systems using a Green's function approach (2023)
Conference Proceeding
In this paper, we take advantage of using a Green's function approach as an analytical tool to study linear and nonlinear aspects of thermoacoustic systems. Green's function is defined as the impulse response of a system, it has a clear physical mean... Read More about The effects of different types of noise on thermoacoustic systems using a Green's function approach.
Sustainable Combustion Technologies Need Acoustics Research (2023)
Conference Proceeding
This paper outlines the challenges of developing hydrogen-fueled combustion systems, which are safe from combustion instabilities. Combustion instabilities can occur in any configuration where a continuously burning flame is housed in an acoustic res... Read More about Sustainable Combustion Technologies Need Acoustics Research.
A unified framework for acoustic instabilities based on the tailored Green's function (2022)
Journal Article
This paper presents a unified framework to analyse the role of thermoacoustic and aeroacoustic sources in a one-dimensional acoustic resonator. We introduce two forms of the tailored Green’s function: one that satisfies the boundary conditions of the... Read More about A unified framework for acoustic instabilities based on the tailored Green's function.
3-D thermoacoustic instability analysis based on Green's function approach (2022)
Journal Article
A fundamental analysis is made of the thermoacoustic instability in a hard-walled box. We model the flame as an acoustically compact source with a heat release characteristic described by a directional nt-law. This has the following features: it give... Read More about 3-D thermoacoustic instability analysis based on Green's function approach.
Analytical approximations for heat release rate laws in the time- and frequency-domains (2020)
Journal Article
This paper focusses on the relationship between the heat release rate and the acoustic field, which is a crucial element in modelling thermoacoustic instabilities. The aim of the paper is twofold. The first aim is to develop a transformation tool, w... Read More about Analytical approximations for heat release rate laws in the time- and frequency-domains.
Advances by the Marie Curie project TANGO in thermoacoustics (2019)
Journal Article
This paper gives an overview of the research performed by the project TANGO – an Initial Training Network (ITN) with an international consortium of seven academic and five industrial partners. TANGO is the acronym for ‘Thermoacoustic and Aeroacoustic... Read More about Advances by the Marie Curie project TANGO in thermoacoustics.
Advances by the Marie Curie project TANGO in thermoacoustics and aeroacoustics (2018)
Journal Article
'No abstract'
Passive control of instabilities in combustion systems with heat exchanger (2018)
Journal Article
One of the major concerns in the operability of power generation systems is their susceptibility to combustion instabilities. In this work, we explore whether a heat exchanger, an integral component of a domestic boiler, can be made to act as a passi... Read More about Passive control of instabilities in combustion systems with heat exchanger.
Nonlinear analytical flame models with amplitude-dependent time-lag distributions (2018)
Journal Article
In the present work, we formulate a new method to represent a given Flame Describing Function by analytical expressions. The underlying idea is motivated by the observation that different types of perturbations in a burner travel with different speed... Read More about Nonlinear analytical flame models with amplitude-dependent time-lag distributions.
Aeroacoustic response of an array of tubes with and without bias-flow (2018)
Journal Article
Heat exchangers, consisting of tube arrays in a cross-flow are a vital component of power generation systems. They are of interest from an acoustic point of view, because they can reflect, transmit and absorb an incident sound wave; in other words, t... Read More about Aeroacoustic response of an array of tubes with and without bias-flow.
Passive instability control by a heat exchanger in a combustor with non-uniform temperature (2017)
Journal Article
Thermoacoustic instabilities, caused by the feedback between unsteady heat release and acoustic pressure perturbations, are characterised by large-amplitude pressure oscillations. These oscillations, if uncontrolled, pose a threat to the integrity of... Read More about Passive instability control by a heat exchanger in a combustor with non-uniform temperature.
USE OF HEAT EXCHANGER FOR PASSIVE CONTROL OF COMBUSTION INSTABILITIES (2016)
Conference Proceeding
GREEN'S FUNCTION APPROACH TO THE RAPID PREDICTION OF THERMOACOUSTIC INSTABILITIES IN COMBUSTORS (2016)
Conference Proceeding
AEROACOUSTIC RESPONSE OF AN ARRAY OF TUBES WITH BIAS-FLOW (2016)
Conference Proceeding
ANALYSIS OF FLAME-INTRINSIC INSTABILITY IN A RESONATOR (2016)
Conference Proceeding
A Green's function approach to predict nonlinear thermoacoustic instabilities in combustors (2016)
Journal Article
The prediction of thermoacoustic instabilities is fundamental for combustion systems such as domestic burners and industrial gas turbine engines. High-amplitude pressure oscillations cause thermal and mechanical stress to the equipment, leading to pr... Read More about A Green's function approach to predict nonlinear thermoacoustic instabilities in combustors.
MEASUREMENT OF THE FLAME DESCRIBING FUNCTION IN COMBUSTORS WITHOUT OPTICAL ACCESS (2015)
Conference Proceeding