Download or read book A Non linear Heterogeneous Model of Composite Solid Propellant Combustion written by B. Rasmussen and published by . This book was released on 1999 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book An Intrinsic Heterogeneous Model of Composite Solid Propellant Combustion written by Bryan Michael Rasmussen and published by . This book was released on 1999 with total page 240 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Non Steady Combustion of Composite Solid Propellants written by N. S. Cohen and published by . This book was released on 1984 with total page 54 pages. Available in PDF, EPUB and Kindle. Book excerpt: Analytical models were developed for the linearized pressure-coupled and velocity-coupled combustion response functions of composite propellants. The theory is that compositional fluctuations occur in the course of composite propellant burning, that these fluctuations originate from the inherent heterogeneity of the propellant microstructure, and that they will contribute to the nonsteady combustion under oscillating pressure (and velocity) conditions. Properties of the response to compositional fluctuations were determined and compared with responses to pressure and velocity fluctuations in series of parametric studies. The response to compositional fluctuations was found to be relatively strong response. Each response tended to increase with increasing AP particle size and pressure, and with decreasing mean crossflow velocity. A series of experiments was carried out with three propellants to determine whether or not certain features of the microstructure could be measured and correlated with response function behavior. Additional tasks pertaining to nonlinear combustion response and high frequency combustion response were performed and are described in the text. A list of publication generated by or in the course of this program is presented.
Download or read book Theory of Solid Propellant Nonsteady Combustion written by Vasily B. Novozhilov and published by John Wiley & Sons. This book was released on 2020-08-21 with total page 352 pages. Available in PDF, EPUB and Kindle. Book excerpt: Despite significant developments and widespread theoretical and practical interest in the area of Solid-Propellant Nonsteady Combustion for the last fifty years, a comprehensive and authoritative text on the subject has not been available. Theory of Solid-Propellant Nonsteady Combustion fills this gap by summarizing theoretical approaches to the problem within the framework of the Zeldovich-Novozhilov (ZN-) theory. This book contains equations governing unsteady combustion and applies them systematically to a wide range of problems of practical interest. Theory conclusions are validated, as much as possible, against available experimental data. Theory of Solid-Propellant Nonsteady Combustion provides an accurate up-to-date account and perspectives on the subject and is also accompanied by a website hosting solutions to problems in the book.
Download or read book Nonsteady Burning and Combustion Stability of Solid Propellants written by Martin Summerfield and published by AIAA. This book was released on 1992 with total page 922 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Dynamics of Solid Propellant Combustion written by Luigi De Luca and published by . This book was released on 1980 with total page 257 pages. Available in PDF, EPUB and Kindle. Book excerpt: A nonlinear stability analysis of solid rocket propellant burning was carried out, within the framework of a thermal theory for thin (quasi-steady gas phase) heterogeneous flames. This required an integral method in reducing the partial differential equation for the condensed phase heat conduction to an approximate ordinary differential equation. A nonlinear algebraic function, called static restoring function, was found that contains all basic properties of equilibrium and stability of burning solid propellants. This function depends on the nature of the solid propellant (including its flame) and the operating conditions. Analysis of the static restoring function reveals the existence of lower and upper burning stabilities. Nonlinear static and dynamic burning stability boundaries were determined and stability properties of several unsteady flame models were compared. Domains of stationary reacting solutions, damped oscillatory burning, self-sustained oscillatory burning, non sustained burning were singled out. Pressure deflagration limit was evaluated. Validity and plausible extensions of this theory are discussed. Most of the analytical predictions were verified by computer simulated burning tests. Experimental results obtained in shock tube apparatus, depressurization strand burner, laser doppler velocimetry rig are presented. (Author).
Download or read book Mechanics and Chemistry of Solid Propellants written by A. C. Eringen and published by Elsevier. This book was released on 2014-06-28 with total page 648 pages. Available in PDF, EPUB and Kindle. Book excerpt: Mechanics and Chemistry of Solid Propellants is a collection of papers presented at the Fourth Symposium on Naval Structural Mechanics, held in Purdue University, Lafayette, Indiana on April 19-21, 1965 under the joint sponsorship of the Office of Naval Research and Purdue University. The contributors consider the development and utilization of solid propellants. This book is composed of 22 chapters that cover the many branches of studies that touch upon the science and technology of solid propellants. Some chapters present the mathematical and physical theories underlying the behavior of solid propellants, such as nonlinear and linear theories of viscoelasticity. Other chapters are devoted to advances in solid propellant binder chemistry; combustion and its effects on the structural integrity of the solid propellant grain; and design and other engineering problems. This book will be of value to scientists, engineers, and researchers who are interested in the diverse applications of solid propellants.
Download or read book One dimensional Nonlinear Model for Determining Combustion Instability in Solid Propellant Rocket Motors written by Louis A. Povinelli and published by . This book was released on 1966 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Weakly Nonlinear Analysis of a Solid Propellant Combustion Model written by Michael S. Reardon and published by . This book was released on 2012 with total page 402 pages. Available in PDF, EPUB and Kindle. Book excerpt: The asymptotic model equations are then discretized using the Crank-Nicolson finite difference method and a direct numerical simulation of the asymptotic equations is carried out for certain parameter combinations. Lastly, the numerical results are compared with the analytical predictions and it is shown that for much of the physical parameter space the analytical and numerical solutions agree. In the physical parameter regimes where the analytical results predict supercritical Hopf bifurcations the slow-time amplitude functions are shown to approach orbits of finite radius in the complex plane where their limit cycle radius and rate of approach is dependent on problem parameters and possibly the initial conditions.
Download or read book Nonlinear Burning Stability of Solid Propellants written by L. De Luca and published by . This book was released on 1983 with total page 288 pages. Available in PDF, EPUB and Kindle. Book excerpt: The nonlinear burning analysis of solid rocket propellants, under development by this research group, was extended to include in particular variable thermal properties and volumetrically distributed chemical reactions in the condensed phase. The theory is restricted to monodimensional combustion waves and thin (i.e., quasi-steady gas phase) heterogeneous flames of thermal nature. Bifurcation diagrams were obtained, predicting the existence of: time-independent steady burning, self-sustained oscillatory steady burning, no steady sustained burning. Several bifurcation parameters were recognized. Static stability boundaries, dynamic stability boundaries, static burning boundaries, pressure deflagration limits were determined for unmetallized AP-based composite propellants. Several thin flame models, available from literature, were properly modified and extended.
Download or read book Fundamentals of Solid Propellant Combustion written by K. K. Kuo and published by . This book was released on 1995 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Solid Propellant Ignition and Other Unsteady Combustion Phenomena Induced by Radiation written by and published by . This book was released on 1976 with total page 268 pages. Available in PDF, EPUB and Kindle. Book excerpt: Experimental and analytical investigations were conducted to understand the ignition and nonsteady burning processes that occur at and near the propellant surface, to determine the connection between the ignitability of a propellant and its other nonsteady combustion characteristics, to quantify the peculiarities of radiative ignition, and to develop a means of ranking propellant ignitability. As a result of these investigations, radiative ignition processes have been explained for a wide variety of propellant and test conditions. The stability properties of heterogeneous combustion waves were considered for linear and nonlinear situations. Nonlinear (large disturbances) solid propellant stability boundaries can be immediately defined from the knowledge of the associated restoring function. The restoring function is a property strictly dependent on the nature of the solid propellant.
Download or read book Combustion Response Modeling for Composite Solid Propellants written by Norman S. Cohen and published by . This book was released on 1978 with total page 137 pages. Available in PDF, EPUB and Kindle. Book excerpt: The objective of this program was to develop a computerized mathematical model of the combustion response function of composite solid propellants, with particular attention to the contributions of the solid phase heterogeneity. A one-dimensional model was developed which treats the solid phase as alternating layers of AP and binder, with an exothermic melt layer at the surface. Solution of the Fourier heat equation in the solid provides temperature and heat flux distributions with space and time. The problem is solved by equating the heat flux at the surface to that produced by a suitable model of the gas phase. An approximation of the BDP flame model is utilized to represent the gas phase. By the use of several reasonable assumptions, it is found that a significant portion of the problem can be solved in closed form. A method is presented by which the model can be applied to tetramodal particle size distributions. A computerized steady-state version of the model was completed, which served to validate the various approximations and lay a foundation for the combustion response modeling. It is concluded that some other mechanism associated with the propellant heterogeneity must be incorporated into the theory to account for observed behavior.
Download or read book Fast Reactions in Energetic Materials written by Alexander S. Shteinberg and published by Springer Science & Business Media. This book was released on 2008-09-26 with total page 203 pages. Available in PDF, EPUB and Kindle. Book excerpt: Modern energetic materials include explosives, blasting powders, pyrotechnic m- tures and rocket propellants [1, 2]. The study of high-temperature decomposition of condensed phases of propellants and their components (liquid, solid and hybrid) is currently of special importance for the development of space-system engineering [3, 4]. To better understand the burning mechanisms (stationary, nonstationary, - steady) of composite solid propellants and their components, information about the macrokinetics of their high-temperature decomposition is required [5]. To be able to evaluate the ignition parameters and conditions of safe handling of heat-affected explosives, one needs to know the kinetic constants of their high-temperature - composition. The development of new composite solid propellants characterized by high performance characteristics (high burning rates, high thermal stability, stability to intrachamber perturbations, and other aspects) is not possible without quanti- tive data on the high-temperature decomposition of composite solid propellants and their components [6]. The same reasons have resulted in signi?cant theoretical and practical interest in the high-temperature decomposition of components of hybrid propellants. It is known that hybrid propellants have not been used very widely due to the low bu- ing (pyrolysis) rates of the polymer blocks in the combustion chambers of hybrid rocket engines. To increase the burning rates it is necessary to obtain information about their relationships to the corresponding kinetic and thermophysical prop- ties of the fuels.
Download or read book Multidimensional Modeling of Composite Solid Propellant Combustion written by Graham D. Kosiba and published by . This book was released on 2017 with total page 190 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Solid propellant Combustion Instability and the Role of Velocity Coupling written by Louis A. Povinelli and published by . This book was released on 1969 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt: Pressure and velocity coupling effects on combustion stability in solid propellant burning.
