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RTO-AG-AVT-039
Unsteady Motions in Combustion Chambers for Propulsion Systems
(Mouvements instables dans les chambres de combustion des systèmes de propulsion)
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| Activity Reference | AVT-039 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Originator's Reference | RTO-AG-AVT-039 AC/323(AVT-039)TP/103 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| ISBN Reference | ISBNs 92-837-0059-7 / 978-92-837-0059-3 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Security Classification | UNCLASSIFIED UNLIMITED | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Originator | NATO Research and Technology Organisation | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Presented at / Sponsored by | This AGARDograph was approved by the Propulsion and Energetics Panel (PEP) of NATO’s Advisory Group for Aerospace Research and Development (AGARD); subsequently it has been sponsored by the Applied Vehicle Technology Panel (AVT) of NATO’s Research and Technology Organisation (RTO). | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Published | December 2006 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Author(s) / Editor(s) | F.E.C. Culick | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Pages | 664 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Keywords
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Air vehicles ; Computer architecture ; Computer programs ; Computerized simulation ; Control theory ; Cost effectiveness ; Decision aids ; Design ; Integrated systems ; Interoperability ; Land vehicles ; M&S (Modelling and Simulation) ; Methodology ; Military vehicles ; Models ; Requirements ; Sea vehicles ; Simulation ; Software development ; Standards ; Systems analysis ; Systems engineering | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Abstract
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This book has several purposes, including a broad historical summary of combustion instabilities in propulsion systems; a concise compilation of the main mechanisms for instabilities in liquid and solid fueled rockets, ramjets, thrust augmentors and gas turbines; development of a theoretical framework for investigating unsteady motions in combustion systems; and accessible surveys of the basic material required to understand the subject. Emphasis is placed throughout the book on observed behavior. For well-understood reasons, the best, and in many respects most useful quantitative data, have been obtained for solid propellant rockets. Hence that type of device occupies a special position in the subject. The book comprises nine chapters and eight annexes. Material in the annexes is not essential for reading and broadly understanding the main part of the book, but is likely interesting for those choosing to do research on the subject. The nine chapters divide into three parts. Chapter 1 covers basic behavior observed in operational systems, and includes brief historical summaries as well as qualitative interpretations of observed behavior. Chapter 2 contains lengthy descriptions of a few mechanisms, especially for some of the behavior known from observations of solid propellant rockets. The second part of the book comprises Chapters 3 and 4 which summarize the development of the method of spatial averaging and construction of the systems of equations used for analytical studies in the subject; and Chapter 5, a survey of those parts of classical acoustics required to understand unsteady motions in combustors. Applications of the formal structure to problems arising in laboratory and full-scale devices are covered in the last four chapters. Chapter 6 treats linear behavior, including linear stability with examples; and Chapter 7 covers some aspects of nonlinear behavior based on the theory developed in the earlier part of the book. Practical methods of treating combustion instabilities are the subjects of the last two chapters. Chapter 8 describes various methods of passive control and how they fit in the general understanding of combustion instabilities. The last chapter is largely descriptive, a brief summary of some of the accomplishments of active control. It´s an interesting and potentially very important subject which has fallen short of many optimistic expectations. There are presently no known practical applications. Successful advancement likely will rest on better understanding of fundamental behavior. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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