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 Combustion Instability Limits Determined by a Nonlinear Theory and a One dimensional Model written by Richard J. Priem and published by . This book was released on 1962 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Modeling of Nonlinear Combustion Instability in Solid Propellant Rocket Motors written by Joseph D. Baum and published by . This book was released on 1984 with total page 299 pages. Available in PDF, EPUB and Kindle. Book excerpt: The investigation sought to further our understanding of the physical mechanisms which control the initiation and severity of nonlinear combustion instability in solid propellant rocket motors. It was directed towards understanding those mechanisms which influence the triggering of instabilities.
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.
Download or read book NASA Technical Note written by and published by . This book was released on 1969 with total page 900 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Nonlinear Combustion Instability in Solid Rocket Motors A Numerical Study of Longitudinal Oscillations with Pressure and Velocity Coupling written by Joseph D. Baum and published by . This book was released on 1982 with total page 45 pages. Available in PDF, EPUB and Kindle. Book excerpt: An existing nonlinear instability model has been extended and improved to allow it to more realistically treat the longitudinal shock wave type of combustion instability frequently encountered in tactical solid rocket motors. Results obtained utilizing this model to investigate limiting amplitude and velocity coupling phenomena in solid rocket motors are presented. An advanced finite difference integration technique capable of accurately describing shocks and contact discontinuities has been incorporated into the computer program, as well as an improved heat conduction solution, an heuristic velocity coupling model, and a spectral analysis capability. Solutions of wave propagation and shock formation and propagation in a variable area duct and a solid propellant rocket motor are presented; as are a number of solutions demonstrating that limiting amplitude is independent of the characteristics of the initial disturbance. Results of a preliminary study of nonlinear velocity modulated limit cycles are presented, as are results that demonstrate the primarily traveling wave nature of nonlinear wave propagation in solid rocket motors, and the complexity of the phase relationships between pressure, burning rate, and velocity oscillations are presented. Finally, the effect of a threshold velocity on non-linear velocity coupled instability was explored, and some of the results are also presented. (Author).
Download or read book Nonlinear Axial Combustion Instability in Solid Propellant Motors written by W. G. Brownlee and published by . This book was released on 1963 with total page 10 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nonlinear axial combustion instability occurs when one or more strong gaseous compression waves propagate longitudinally within a solid propellant rocket motor. The nonlinear unsteady flow field derives energy through interaction with the combustion process and causes an increase in the time-averaged burning rate, pressure, and thrust. This behavior has been investigated using polyurethane-ammonium perchlorate propellanta and some 200 motors in the size range 2-in.-diam by 10-in.-long to 17-in.-diam by 180-in.long. Reproducible results were obtained. The motors were found to be linearly stable and nonlinearly unstable with respect to initiation of instability. Thus, normal proof firings are unlikely to detect inherent instability, since a flow disturbance of finite amplitude is required to trigger the system. A pulse injection method of triggering was applied to all firings. As operating pressures increased above a critical value P the motors became capable of instability, the severity increasing monotonically with the restriction ratio. The effect on the critical value of changing the motor scale, length to diameter ratio, grain cross section, grain temperature, and of adding aluminum alloy and lithium fluoride to the propellant was determined. (Author).
Download or read book Nonlinear Combustion Instability in a Solid Propellant Two Dimensional Window Motor written by Patrick M. Hughes and published by . This book was released on 1978 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Investigation of Nonlinear Combustion Instability in Solid Propellant Rocket Motors by Approximate Analytical Techniques written by Ben T. Zinn and published by . This book was released on 1975 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Experimental Evaluation of Pulse triggered Nonlinear Combustion Instability in Solid Propellant Rocket Motors written by Paul Harris (M.Sc.) and published by . This book was released on 2000 with total page 276 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Modelling of Nonlinear Longitudinal Combustion Instability in Solid Propellant Rocket Motors written by G. M. H. J. L. Gadiot and published by . This book was released on 1988 with total page 656 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Combustion Instability Limits Determined by a Nonlinear Theory and a One dimensional Model written by Richard J. Priem and published by . This book was released on 1962 with total page 43 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Multi Dimensional Combustion Instability Analysis of Solid Propellant Rocket Motors written by T. J. Chung and published by . This book was released on 1985 with total page 47 pages. Available in PDF, EPUB and Kindle. Book excerpt: Analytical models are developed for the multi-dimensional combustion instability analysis of solid propellant rocket motors. This research was motivated by the need for improvement of the current practice in combusiton instability analysis. For example, the burning rates and response functions are affected by the extremely complex flowfield. The flow is three-dimensional or at least two-dimensional in axisymmetric geometries; vortex motions and turbulent flows must be adequately calculated; the coupling mechanism of acoustic and hydrodynamic wave oscillations and particle damping should be clarified. These flowfield phenomena, after all, are originated from the flame zone activities - oscillatory behavior of all field variables such as temperature, velocity, pressure, density of the gas, and fuel fractions. The response functions, which serve as boundary conditions for the flowfield can be calculated from the first and second order perturbation eigenvalue analyses of the flame zone governing equations. The effect of velocity coupling appears, naturally, in the second order (nonlinear) solutions. All calculations are carried out using the finite element method. Some of the findings are summarized.
Download or read book Nonlinear Analysis of Solid Rocket Combustion Instability written by Jay N. Levine and published by . This book was released on 1974 with total page 107 pages. Available in PDF, EPUB and Kindle. Book excerpt: The report describes, and serves as a user's manual, for the Ultrasystems Nonlinear Longitudinal Solid Rocket Motor Instability Program. The program solves the one dimensional, two-phase, time dependent equations of motion using the Rubin and Burstein finite difference method. This program has been structured in a user oriented manner, and is designed to be used as a general tool for engineering analysis of solid rocket motor longitudinal instability. This volume contains a description of all of the subroutines and program functions used in the instability program. A dictionary of all of the variables contained in blank, or labeled, commons is also included. Descriptions of the input required to operate the program, the output generated, and the logical units utilized are presented; followed by a sample case which serves to illustrate the text, as well as providing a method for checking out the program.
Download or read book Triggering Axial Instabilities in Solid Rockets Numerical Predictions written by D. E. Kooker and published by . This book was released on 1973 with total page 17 pages. Available in PDF, EPUB and Kindle. Book excerpt: A theoretical model describing the nonlinear behavior of axial-mode intermediate frequency combustion instability in a solid rocket is developed. Numerical solutions have been obtained to the time-dependent conversation equations describing the one-dimensional two-phase flow in a solid propellant combustion chamber and choked nozzle system. Predictions of the engine response to various amplitude disturbances are discussed. Under certain conditions, the propellant burning rate exhibits sharp, finite-amplitude spikes which lead to large amplitude axial instabilities in the engine flow field. (Modified author abstract).
Download or read book A Selected Listing of NASA Scientific and Technical Reports for 1966 written by United States. National Aeronautics and Space Administration. Scientific and Technical Information Division and published by . This book was released on 1967 with total page 2084 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Experimental Evaluation of Pulse triggered Nonlinear Combustion Instability in Solid Propellant Rocket Motors written by and published by . This book was released on 2000 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
