Adaptive Control of Combution Instabilities Using Real-time Modes Observation PDF Download
Are you looking for read ebook online? Search for your book and save it on your Kindle device, PC, phones or tablets. Download Adaptive Control of Combution Instabilities Using Real-time Modes Observation PDF full book. Access full book title Adaptive Control of Combution Instabilities Using Real-time Modes Observation by Clifford Edgar Johnson. Download full books in PDF and EPUB format.
Author: Clifford Edgar Johnson Publisher: ISBN: Category : Adaptive control systems Languages : en Pages :
Book Description
Combustion instabilities are a significant problem in combustion systems, particularly in Low NOx Gas Turbine combustors. These instabilities result in large-scale pressure oscillations in the combustor, leading to degraded combustor performance, shortened lifetime, and catastrophic combustor failure. The objective of this research was to develop a practical adaptive active control system that, coupled with an appropriate actuator, is capable of controlling the combustor pressure oscillations without a priori knowledge of the combustor design, operating conditions or instability characteristics. The adaptive controller utilizes an observer that determines the frequencies, phases and amplitudes of the dominant modes of the oscillations in real time. The research included development and testing of the adaptive controller on several combustors and on an unstable acoustic feedback system in order to analyze its performance. The research also included investigations of combustor controllability and combustor stability margin, which are critical issues for practical implementation of an active control system on an industrial combustor. The results of this research are directly applicable to a variety of combustors and can be implemented on full-scale industrial combustion systems.
Author: Clifford Edgar Johnson Publisher: ISBN: Category : Adaptive control systems Languages : en Pages :
Book Description
Combustion instabilities are a significant problem in combustion systems, particularly in Low NOx Gas Turbine combustors. These instabilities result in large-scale pressure oscillations in the combustor, leading to degraded combustor performance, shortened lifetime, and catastrophic combustor failure. The objective of this research was to develop a practical adaptive active control system that, coupled with an appropriate actuator, is capable of controlling the combustor pressure oscillations without a priori knowledge of the combustor design, operating conditions or instability characteristics. The adaptive controller utilizes an observer that determines the frequencies, phases and amplitudes of the dominant modes of the oscillations in real time. The research included development and testing of the adaptive controller on several combustors and on an unstable acoustic feedback system in order to analyze its performance. The research also included investigations of combustor controllability and combustor stability margin, which are critical issues for practical implementation of an active control system on an industrial combustor. The results of this research are directly applicable to a variety of combustors and can be implemented on full-scale industrial combustion systems.
Author: Dan Zhao Publisher: Academic Press ISBN: 0323899188 Category : Technology & Engineering Languages : en Pages : 1145
Book Description
Thermoacoustic Combustion Instability Control: Engineering Applications and Computer Codes provides a unique opportunity for researchers, students and engineers to access recent developments from technical, theoretical and engineering perspectives. The book is a compendium of the most recent advances in theoretical and computational modeling and the thermoacoustic instability phenomena associated with multi-dimensional computing methods and recent developments in signal-processing techniques. These include, but are not restricted to a real-time observer, proper orthogonal decomposition (POD), dynamic mode decomposition, Galerkin expansion, empirical mode decomposition, the Lattice Boltzmann method, and associated numerical and analytical approaches. The fundamental physics of thermoacoustic instability occurs in both macro- and micro-scale combustors. Practical methods for alleviating common problems are presented in the book with an analytical approach to arm readers with the tools they need to apply in their own industrial or research setting. Readers will benefit from practicing the worked examples and the training provided on computer coding for combustion technology to achieve useful results and simulations that advance their knowledge and research. Focuses on applications of theoretical and numerical modes with computer codes relevant to combustion technology Includes the most recent modeling and analytical developments motivated by empirical experimental observations in a highly visual way Provides self-contained chapters that include a comprehensive, introductory section that ensures any readers new to this topic are equipped with required technical terms
Author: Petros Koumoutsakos Publisher: Springer ISBN: 3540360859 Category : Technology & Engineering Languages : en Pages : 239
Book Description
This monograph presents the state of the art of theory and applications in fluid flow control, assembling contributions by leading experts in the field. The book covers a wide range of recent topics including vortex based control algorithms, incompressible turbulent boundary layers, aerodynamic flow control, control of mixing and reactive flow processes or nonlinear modeling and control of combustion dynamics.
Author: B. T. Zinn Publisher: ISBN: Category : Languages : en Pages : 16
Book Description
This paper describes results of several studies of sensors, actuators and control systems for active control of combustor processes. First, the paper discusses the performance of an adaptive active control system (ACS) for controlling detrimental combustion instabilities. This ACS consists of an observer that determines the time dependent characteristics of the instability in real time, a adaptive controller and a fueled a injector actuator. During control, the controller sends a time varying signal to the actuator and the corresponding system S response is determined by the observer in practically real time. These data are then used to determine the optimum control parameters. Results obtained in several studies demonstrate that this ACS can rapidly and effectively damp combustion instabilities without apriori knowledge of the characteristics of the instability. The second part of the paper discusses two open loop applications of synthetic jets (SJ) aimed to improve combustor mixing processes. Specifically, the paper describes studies whose objective was to improve the mixing between fuel and air and the combustor pattern factor. The results of these studies show that both improvements are possible. These studies also show that SJ can be used to enhance both small and large scale mixing processes and that they significantly improve the pattern factor.
Author: Clifford Edgar Johnson
Author: Clifford Edgar Johnson
Author: Y. Neumeier
Author: Dan Zhao
Author: Anil Gulati
Author: Petros Koumoutsakos
Author: 
Author: Clifford E. Johnson
Author: 
Author: Anil Gulati
Author: B. T. Zinn