Results 21 to 30 of about 1,003 (200)
Aerospace, 2022 Cylindrical ducts with axial mean temperature gradient and mean flows are typical elements in rocket engines, can combustors, and afterburners. Accurate analytical solutions for the acoustic waves of the longitudinal and transverse modes within these ...
Jiaqi Nan, Jingxuan Li, Lijun Yang
doaj +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
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 +1 more source
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
Accounting for convective effects in zero-Mach-number thermoacoustic models [PDF]
, 2014 This paper presents a methodology to account for some mean-flow effects on thermo-acoustic instabilities when using the zero-Mach-number assumption. It is shown that when a computational domain is represented under the M=0 assumption, a nonzero-Mach ...
Nicoud, F. +5 more
core +1 more source
Numerical investigation of the premixed V-flame stabilization and blowout [PDF]
مهندسی مکانیک شریف, 2021 Global warming and high fossil fuel consumption increase the application of the low-Nox burner with lean-premixed combustion. However, this type of combustion is more susceptible to thermoacoustic instabilities.
N. Nabatian
doaj +1 more source
Complexity, Volume 2021, Issue 1, 2021., 2021 The complex bursting oscillation and bifurcation mechanisms in coupling systems of different scales have been a hot spot domestically and overseas. In this paper, we analyze the bursting oscillation of a generalized Duffing–Van der Pol system with periodic excitation.
Youhua Qian +3 more
wiley +1 more source
Using LES to Study Reacting Flows and Instabilities in Annular Combustion Chambers [PDF]
, 2011 Great prominence is put on the design of aeronautical gas turbines due to increasingly stringent regulations and the need to tackle rising fuel prices.
Pierre Wolf +9 more
core +1 more source
Non-normality and nonlinearity in thermoacoustic instabilities [PDF]
, 2015 Analysis of thermoacoustic instabilities were dominated by modal (eigenvalue) analysis for many decades. Recent progress in nonmodal stability analysis allows us to study the problem from a different perspective, by quantitatively describing the short ...
Sujith, RI +5 more
core +2 more sources