Results 21 to 30 of about 1,024 (213)
Metamaterial‐Augmented Head‐Mounted Audio Module
Advanced Materials Technologies, Volume 8, Issue 19, October 10, 2023., 2023 A metamaterial‐transducer resonant coupling is proposed inside a head‐mounted audio module to achieve a 3–7 dB broadband sound pressure level improvement within 50–700 Hz, which is the most challenging frequency range for radiation enhancement. The acoustic metamaterial not only enhances voltage sensitivity near the intrinsic metamaterial resonance ...
Jun Ji +5 more
wiley +1 more source
Energies, 2023 Hydrogen can play a key role in the gradual transition towards a full decarbonization of the combustion sector, e.g., in power generation. Despite the advantages related to the use of this carbon-free fuel, there are still several challenging technical ...
Vito Ceglie +4 more
doaj +1 more source
International Journal for Numerical Methods in Fluids, Volume 94, Issue 8, Page 1082-1110, August 2022., 2022 Vorticity contours in a three‐dimensional bluff‐body combustor. Abstract The objective of this study is to develop and apply efficient solution techniques for numerical modeling of combustion with stiff chemical kinetics in practical combustors. The new technique combines a fourth‐order implicit‐explicit (IMEX) additive Runge‐Kutta scheme (ARK) with ...
Joshua Christopher +2 more
wiley +1 more source
Advanced Control for Applications, Volume 4, Issue 2, June 2022., 2022 Abstract Predictive functional control (PFC) is a straightforward and cheap model‐based technique for systematic control of well‐damped open‐loop processes. Nevertheless, its oversimplified design characteristics are often the cause of diminished efficacy in more challenging applications; processes involving lightly damped and/or unstable dynamics have
Muhammad Saleheen Aftab +1 more
wiley +1 more source
Experimental Investigation on Self-Excited Thermoacoustic Instability in a Rijke Tube
Applied Sciences, 2022 The experimental investigations into the thermoacoustic instability in a Rijke tube are presented. In order to capture the dynamics of the temperature, a single-ended tunable diode laser absorption spectroscopy (TDLAS) technique was developed, with a ...
Liezhao Luo +5 more
doaj +1 more source
Thermoacoustic Instabilities in the Rijke Tube: Experiments and Modeling [PDF]
, 2003 Thermoacoustic instability can appear in thermal devices when unsteady heat release is coupled with pressure perturbations. This effect results in excitation of eigen acoustic modes of the system.
Konstantin Matveev +1 more
core +1 more source
Experiments and identification of thermoacoustic instabilities with the Rijke tube [PDF]
2020 IEEE Conference on Control Technology and Applications (CCTA), 2020 ISBN:978-1-7281-7141 ...
Andrea Iannelli +3 more
openaire +2 more sources
Energy Science &Engineering, Volume 9, Issue 10, Page 1872-1886, October 2021., 2021 This work introduces a method to detect and optimize the flame front boundary. A high‐speed camera was employed to continuously capture the flame images. By setting appropriate intensity thresholds, the impact noise can be eliminated from the image and the flame front boundary can be determined.
Lanzhou Gao +6 more
wiley +1 more source
Application of planar laser-induced fluorescence measurement techniques to study the heat transfer characteristics of parallel-plate heat exchangers in thermoacoustic devices [PDF]
, 2010 This paper describes the development of an experimental arrangement and the application of acetone-based planar laser-induced fluorescence (PLIF) measurement techniques to study the unsteady characteristics of heat transfer processes in the parallel ...
Artur J Jaworski +8 more
core +1 more source
3-D thermoacoustic instability analysis based on Green's function approach [PDF]
, 2022 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.
Heckl, Maria +3 more
core +1 more source