Download or read book A Nonlinear Analytical Model of High frequency Combustion Instability in a Rocket Engine written by Zhenguo Wang and published by . This book was released on 2000 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Analysis of Liquid Rocket Engine Combustion Instability written by M. R. Beltran and published by . This book was released on 1966 with total page 159 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report develops a nonlinear model which can be used to predict combustion instability zones in liquid rocket engines. The model is developed by combining a nonlinear instability model with a steady-state vaporization model. Such an analysis determines the zones of an engine in which a tangential mode of high frequency instability is most easily initiated. A rocket engine can be analyzed by incrementally dividing the combustion chamber into annular nodes in the r and z directions. Steady-state properties at each annular node or position in the chamber are computed from the steady-state vaporization computer program. The steady-state program is capable of computing combustion profiles in thermally unstable propellants of the monomethylhydrazine/nitrogen tetroxide type. This model describes droplet vaporization with vapor phase decomposition. Using the computed steady-state properties and the stability limit curves from the instability computer program, stability at each node is determined. This process is repeated for each node to determine a stability map of the entire engine.
Download or read book Analytical Modeling of High Frequency Combustion Instability in Liquid fueled Rocket Engines with Baffled Combustion Chambers written by Dan Milano and published by . This book was released on 2008 with total page 154 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Liquid Propellant Rocket Combustion Instability written by David T. Harrje and published by . This book was released on 1972 with total page 678 pages. Available in PDF, EPUB and Kindle. Book excerpt: The solution of problems of combustion instability for more effective communication between the various workers in this field is considered. The extent of combustion instability problems in liquid propellant rocket engines and recommendations for their solution are discussed. The most significant developments, both theoretical and experimental, are presented, with emphasis on fundamental principles and relationships between alternative approaches.
Download or read book Liquid Rocket Engine Combustion Instability written by Vigor Young and published by AIAA. This book was released on 1995 with total page 606 pages. Available in PDF, EPUB and Kindle. Book excerpt: Annotation Since the invention of the V-2 rocket during World War II, combustion instabilities have been recognized as one of the most difficult problems in the development of liquid propellant rocket engines. This book is the first published in the United States on the subject since NASA's Liquid Rocket Combustion Instability (NASA SP-194) in 1972. In this book, experts cover four major subject areas: engine phenomenology and case studies, fundamental mechanisms of combustion instability, combustion instability analysis, and engine and component testing. Especially noteworthy is the inclusion of technical information from Russia and China--a first.
Download or read book Internal Combustion Processes of Liquid Rocket Engines written by Zhen-Guo Wang and published by John Wiley & Sons. This book was released on 2016-08-29 with total page 392 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book concentrates on modeling and numerical simulations of combustion in liquid rocket engines, covering liquid propellant atomization, evaporation of liquid droplets, turbulent flows, turbulent combustion, heat transfer, and combustion instability. It presents some state of the art models and numerical methodologies in this area. The book can be categorized into two parts. Part 1 describes the modeling for each subtopic of the combustion process in the liquid rocket engines. Part 2 presents detailed numerical methodology and several representative applications in simulations of rocket engine combustion.
Download or read book Liquid Propellant Rocket Combustion Instability written by and published by . This book was released on 1972 with total page 668 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book An Analytical Model for Predicting the Pressure and Flow Transients in a Gaseous H2 O2 100 LBf Thrust Reaction Control System Rocket Engine written by James Joseph Markowsky and published by . This book was released on 1971 with total page 356 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Numerical Analysis of Nonlinear Longitudinal Combustion Instability in Metalized Propellant Solid Rocket Motors Volume I Analysis and Results written by and published by . This book was released on 1972 with total page 191 pages. Available in PDF, EPUB and Kindle. Book excerpt: The present report is part of a two volume set which describes a nonlinear solid rocket motor instability analysis and computer program. The primary objective of the current effort was the development and solution of a nonlinear analytical longitudinal instability model, which would allow all of the various governing phenomena to be accounted for in a coupled manner. The two primary elements of the current instability analysis are a method of characteristics solution of the two phase flow in the combustion chamber of the motor, and a coupled calculation of a transient burning rate. It is based on an extension of the most popular, linear, harmonic combustion response model. The current method allows the calculation of propellant burning response to a pressure disturbance of arbitrary waveform, for all time, including the period immediately following the initiation of the disturbance. The analysis also includes a model for velocity coupled response. The nonlinear effects of velocity coupling on the growth of pressure waves in a combustion chamber can be computed.
Download or read book Stability Analysis of a Liquid Fuel Annular Combustion Chamber written by and published by . This book was released on 1979 with total page 153 pages. Available in PDF, EPUB and Kindle. Book excerpt: High frequency combustion instability continues to be a major problem in the development and operation of rocket engines. Most mathematical models simulating this phenomena involve the derivation and solution of complex non- linear differential equations. In an effort to overcome the mathematical difficulties associated with the solution of the nonlinear combustion instability problems, two methods of analysis were developed. In investigating the problems of combustion instability in an annular combustion chamber, a modified Galerkin method was used to produce a set of modal amplitude equations from the general non-linear partial differential acoustic wave equation. From these modal amplitude equations, the two-variable perturbation method was used to develop a set of approximate equations of a given order of magnitude. These equations were modeled to show the effects of velocity sensitve combustion instabilities by evaluating the effects of certain parameters in the given set of equations. From evaluating these effects, one can ascertain which parameters cause instabilities to occur in the combustion chamber. In this analysis, it is assumed that in the annular combustion chamber, the liquid propellants are injected uniformly across the injector face, the combustion processes are distributed throughout the combustion chamber and that no time delay occurs in the combustion processes.
Download or read book Parameter Plane Analysis of Rocket Engine Combustion Instability written by Kenneth Kern Wong and published by . This book was released on 1969 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Analysis of Longitudinal High Frequency Combustion Instability in a Gas Fueled Rocket Motor written by Hubert Georges Bortzmeyer and published by . This book was released on 1961 with total page 1 pages. Available in PDF, EPUB and Kindle. Book excerpt: A theoretical investigation of the stability boundary for longitudinal high frequency oscillations in a gas fueled rocket motor has been carried out. It was based on the following assu ptions: (1) the mechanism responsible for combustion instability involves oscillatory heat transfer to the injector plate; and (2) the rates of chemical reactions in homogeneous gas phase are high enough to enable the chemical system to respond without phase lag to periodic variations of the conditions in the chamber. Under these assumptions the equations governing the propagation of small pressure perturbations in the combustion chamber were derived, and oscillatory solutions of the type were found. By applying proper boundary conditions to these solutions a so-called characteristic equation for the unknown complex quantity s has been derived. Numerical solutions have been carried out for the relatively simple case of moderate frequency oscillations taking place in a chamber ended by a short nozzle. (Author).
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 187 pages. Available in PDF, EPUB and Kindle. Book excerpt: The primary objective of the current effort was to improve the utility, efficiency and accuracy of the previously developed nonlinear longitudinal combustion instability program. A finite difference procedure has been substituted for the method of characteristics solution of the governing equations of motion. The range of allowable motor and grain geometries has been greatly extended. In addition, the two-phase analysis has been extended to multiple particle sizes. A comparison with data from a small laboratory pulse motor has demonstrated that the present nonlinear model is capable of quantitatively predicting limiting amplitude when the combustion response of the propellant is adequately characterized. The program has also been modified to make it applicable to T-burners. A vent model which accounts for acoustic radiation losses has been developed. Separate nonlinear particle damping and uncoupled nonlinear combustion response studies have been carried out. (Modified author abstract).
Download or read book Combustion Instability Analytical Survey written by LIBRARY OF CONGRESS WASHINGTON D C AEROSPACE TECHNOLOGY DIV. and published by . This book was released on 1965 with total page 61 pages. Available in PDF, EPUB and Kindle. Book excerpt: Liquid rocket engines are subject to a wide variety of types of combustion instability. The two basic instability modes are 'chugging, ' a low-frequency instability mode which is caused by interaction between the chamber pressure and the injection flow rate fluctuations, and 'screaming, ' a more harmful high-frequency, acoustic instability mode which may lead to burnout of the motor due to increased heat flux. Only two articles on low-frequency instability were found in Soviet open literature. Experimental studies or analyses of high-frequency instability which take into account actual engine operation, i.e., mixing, evaporation, dissociation fuel atomization, etc., were not found in the literature surveyed. However, several theoretical studies were found which deal with highfrequency instability under idealized conditions. The majority of the Soviet studies included in this report deal with the interaction of shock and pressure waves with the flame front. These studies are of high phenomenological interest and are indirectly applicable to combustion stability analysis. (Author).
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1995 with total page 702 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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 Cumulative Index to NASA Tech Briefs written by United States. National Aeronautics and Space Administration and published by . This book was released on 1970 with total page 788 pages. Available in PDF, EPUB and Kindle. Book excerpt:
