Download or read book The Sensitivity of Double Base Propellant Burning Rate to Initial Temperature written by Richard C. Strittmater and published by . This book was released on 1976 with total page 34 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Parr-Crawford, overlapping zone, model of double base propellant combustion, has been programmed for the fizz burning process. Burning rate, surface temperature, and maximum fizz zone temperature are measured at nominal range conditions (1 atm, 293 K) for a given propellant and used in the model to determine the pre-exponential factors in the two Arrhenius reaction rate equations. The values of these two factors are then held constant as initial temperature and pressure are varied. From these solutions, points on the curves of constant initial temperature (To) are plotted on a graph of the log burning rate (r) vs log pressure (p). From these graphs it can be observed from the slope and spacing of the lines whether a burning rate law of the form r = Co exp(oTo)pn can be used to systematize the model solutions; i.e., if the lines are straight and the vertical distance between lines is proportional to the difference in initial temperature, the n and o can be given constant values. In this equation, n is the burning rate exponent and is equal to the slope of the lines. If all the initial temperature dependence is concentrated in the exponential term, then o can be defined as the initial temperature sensitivity of the burning rate. Co then depends only on propellant composition.
Download or read book The Steady State Burning Rate of Double base Solid Propellants at Low Pressures and Various Initial Temperatures written by Donald Lee Clary and published by . This book was released on 1968 with total page 172 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Investigation of Flameless Combustion Mechanism of M 2 Double base Propellant written by Cecil Eugene Kirby and published by . This book was released on 1971 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt: Heat of reaction for flameless combustion of M-2 double-base propellant /20 percent nitroglycerin 77 percent nitrocellulose, 3 percent other ingredients/ at varying pressures.
Download or read book The Effect of Acceleration on the Burning Rates of Composite and Double Base Solid Propellants written by David W. Netzer and published by . This book was released on 1968 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report discusses four experimental investigations: (1) The effect of propellant strand size on the experimentally measured burning rate at various acceleration levels; (2) an investigation of the effect of initial propellant temperature on acceleration induced burning rate augmentation; (3) an investigation of the effect of nominal burning rate on acceleration induced burning rate augmentation; and (4) a photographic investigation of augmented burning rate. Significance of the investigation and a brief review of the literature are presented.
Download or read book Nonsteady Burning and Combustion Stability of Solid Propellants written by Luigi De Luca and published by AIAA (American Institute of Aeronautics & Astronautics). This book was released on 1992 with total page 924 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Investigation of Composite Solid Propellant Burning Rate Temperature Sensitivity written by Duane Arnold Baker and published by . This book was released on 1973 with total page 205 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Propellants and Explosives written by Naminosuke Kubota and published by Wiley-VCH. This book was released on 2002-03-19 with total page 264 pages. Available in PDF, EPUB and Kindle. Book excerpt: Propellants and explosives and contain considerable chemical energy that can be converted into rapid expansion. In contrast to the simple burning of a fuel, explosives and propellants are self-contained and do not need an external supply of oxygen via air. Since their energy content inherently creates the risk of accidental triggering of the explosive reaction, the correct synthesis, formulation, and handling during production and use are of utmost importance for safety, necessitating specialist knowledge on energetic materials, their characteristics, handling and applications.
Download or read book Effects of Propellant Composition Variables on Accleration induced Burning rate Augmentation of Solid Propellants written by G. Burton Northam and published by . This book was released on 1972 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Effect of External Thermal Radiation on the Burning Rate of Double Base Solid Propellants Steady Stimulus written by M. M. Ibiricu and published by . This book was released on 1975 with total page 67 pages. Available in PDF, EPUB and Kindle. Book excerpt: A model has been developed that describes the thermal interaction of an externally applied radiant energy flux with the combustion zone of a burning homogeneous solid propellant. It is shown that only the radiation reaching the propellant surface, and absorbed within the solid phase, can effectively induce burning rate augmentation. Many conditions have been investigated in detail, including the limiting cases of solid-phase surface absorption and deep in-depth absorption with heat generation. This extensive examination has permitted the identification of the necessary conditions for treating the effect of radiation as an increase in the initial propellant temperature. The conditions at which such an equivalence principle is not applicable have also been identified. By extension of the theory, important subsidiary effects on temperature sensitivity have been identified, particularly the role of stabilizers and other propellant ingredients.
Download or read book HIVEL R 2 written by Jack Smith Moore and published by . This book was released on 1968 with total page 154 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Mechanism of Super rate Burning of Catalyzed Double Base Propellants written by Naminosuke Kubota and published by . This book was released on 1973 with total page 222 pages. Available in PDF, EPUB and Kindle. Book excerpt: The study is directed at understanding how organic lead salts (at the 1% level) alter the burning mechanisms of double base propellants to produce large (up to 300%) burning rate increases (super-rate burning) and domains of reduced burning rate pressure and temperature sensitivity (plateau burning). Investigations were carried out with nitrocellulose and trimethylolethane trinitrate (TMETN) double base propellants with systematic variations in additives (including lead powder, lead oxide, lead salicylate, copper powder, copper salicylate, finely divided carbon, and oxamide), particle size, and degree of dispersion. Diagnostic experiments (from 0.1 to 100 atm) examined burning rate behavior, gas-phase structure, burning-surface structure, temperature profiles in the reaction zones, and global effects. The portion of decomposed organic molecules which appears at the surface in the form of carbon rather than readily oxidizable aldehydes reduce the effective fuel to oxidizer ratio (aldehyde to NO2).
Download or read book The Effect of Acceleration on the Burning Rate of Double Base Rocket Propellants written by Melvin John Bulman and published by . This book was released on 1969 with total page 50 pages. Available in PDF, EPUB and Kindle. Book excerpt: Double base rocket propellants with and without aluminum were burned in a centrifuge at two pressures and nine accelerations. The burning rates were measured to isolate the effect of the aluminum. The burning rate of the non-aluminized propellant was found to vary with acceleration and a model was advanced. The addition to aluminum causes an increase in burning rate at higher accelerations and a possible mechanism is discussed. (Author).
Download or read book Thermal Transport Properties in the Primary Gas phase Combustion Zone of Double base Propellant written by Martin S. Miller and published by . This book was released on 1986 with total page 38 pages. Available in PDF, EPUB and Kindle. Book excerpt: Economies in both time and expense can be achieved in the design of propelling charges for guns by the use of mathematical models of the interior ballistic cycle. Continued development of such models is impeded by the need to describe the kinetics controlling the propellant heat release in a more realistic way. Work toward this goal has thus far shown that the use of overall reactions to describe flames with complex kinetics can preserve the key thermal features of the flame such as the temperature and heat release profiles and flame speed. A method has also been developed for determining the kinetic parameters of this overall reaction from a temperature profile measured in the combustion wave. The kinetics extraction technique, however, requires knowledge of the thermal conductivity and specific heat of the gas mixture through the zone of heat release. Uncertainties in these transport properties stem from uncertainties in the molecular composition in the combustion zones of propellants. This study assesses the probable error in best estimates of the transport parameters and determines how this error propagates through the kinetics extraction technique and into a calculation of the burning rate based on the derived kinetics. The resultant errors turn out to be modest, and a major effort to measure the molecular composition for this purpose does not appear warranted at present.
Download or read book Rocket Propellant Technology written by Jawaharlal "Ram" Ramnarace and published by Page Publishing Inc. This book was released on 2016-01-11 with total page 297 pages. Available in PDF, EPUB and Kindle. Book excerpt: Rocket Propulsion has come of age. Although its potentialities and capabilities in many areas have been recognized for centuries, it is only in recent years that scientists have had the materials and the manufacturing techniques at their command so they could control and direct the tremendous forces available. Space exploration and manned flights by astronauts have brought the science of rocketry to the attention of the general public. It has also stimulated the interest of students at all levels of advancement in the technical details of space flight. Rocket Propellant Technologies is written for serious students of astronautics. This volume reviews briefly the history of rocketry and the fundamental principles connected with rocket propulsion. Types of propellants, the chemical reactions involved, and the techniques used in manufacturing are explained. The merits of solid and liquid fuels are enumerated. Exotic propellants of the future are discussed, with reasons why their development is essential. Finally, the safety aspects of manufacturing and testing rocket propellants are given in detail. The Amateur Rocket Association under whose guidance this series has been prepared, serves as a focal point for many related activities, bringing new ideas to the attention of its members and offering suggestions for future lines of research.
Download or read book Solid Propellant Combustion written by Paul Vantoch and published by . This book was released on 1966 with total page 172 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Combustion of Solid Propellants written by and published by . This book was released on 2002 with total page 63 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book An Investigation of Solid Propellant Combustion in Standard and High Acceleration Environments written by Michael Abraham and published by . This book was released on 1974 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nonmetallized double-base and composite propellant, metallized composite propellant, and ammonium perchlorate (AP)/binder sandwich combustion were studied in standard and high acceleration environments. Experimental techniques used were high speed motion pictures, tow-color schlieren, laser schlieren, and centrifuge mounted combustion bombs. It was found for double-base propellant that the temperature increased continuously from the surface into the visible flame. Acceleration induced burning rate augmentation occurred and resulted in elimination of the visible flame. Acceleration apparently modified the surface or subsurface zones. AP/binder sandwich combustion was also found to be acceleration sensitive with binder flow-AP interactions proposed as the mechanism. Composite propellants burned with local diffusion flames to pressures as slow as 100 psi. A comparison is made between AP/binder sandwich combustion and propellant combustion. (Author).
