Download or read book Combustion Tailoring of Solid Propellants by Oxidizer Encasement written by Robert L. Geisler and published by . This book was released on 1972 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the patent solid rocket fuel particles such as aluminum, beryllium, magnesium, or boron are encased in an oxidizer by crystallizing the oxidizer onto the fuel particles. Encasement of the fuel particles before binding with a binder matrix enhances the combustion efficiency of the propellant.
Download or read book Combustion Tailoring Criteria for Solid Propellants written by Norman S. Cohen and published by . This book was released on 1967 with total page 94 pages. Available in PDF, EPUB and Kindle. Book excerpt: The objective of this research program is to develop an analytical model describing the steady-state combustion of solid propellants. The model will be developed and implemented from experimental data acquired from a dual experimental program. Tests with small samples of propellants will provide experimental data for modeling the propellant combustion process for different ingredient variations, e.g., oxidizer size, concentration, and metals. Additional tests in apparatus simulating the environment of a rocket motor will provide experimental data showing the effect of rocket motor environment upon the combustion process. During Phase 4, analytical work was directed towards modeling the gaseous reaction zones above the surface of an ammonium perchlorate oxidized propellant. Experimental work was directed towards testing a series of propellants containing four different oxidizers.
Download or read book Official Gazette of the United States Patent Office written by United States. Patent Office and published by . This book was released on 1974 with total page 1522 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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 Mechanism of Combustion of Heterogeneous Solid Propellants written by and published by . This book was released on 1998 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The objective of the research is to establish the processes in solid propellant combustion that control steady and nonsteady combustion rate (composite propellants). The practical goal is to: 1. Tailor burning rate by variation of formulation (oxidizer particle size, ballistic modifiers, and choice of binders). This includes learning what processes lead to low or negative sensitivity of burning rate to pressure increase (plateau and mesa burning). 2. Determine steps in the combustion process that are most responsive to oscillatory flows (combustion instability). 3. Evaluate the combustion characteristics of new oxidizer and binder ingredients, and of propellants that include new ingredients (and compare results with those of AP oxidizer and Ap/hydrocarbon binder propellants). 4. Develop a realistic qualitative model of the combustion process that would identify the requirements for formulation of realistic analytical models.
Download or read book Official Gazette of the United States Patent and Trademark Office written by and published by . This book was released on 1975 with total page 3034 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Relative Ignitability of Typical Solid Propellants with Chlorine Trifluoride written by Harrison Allen and published by . This book was released on 1963 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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 Effect of Oxidizer Particle Size on Solid propellant Combustion Stability written by Gerald Morrell and published by . This book was released on 1965 with total page 13 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Effect of Composition on Combustion of Solid Propellants During a Rapid Pressure Decrease written by Carl C. Ciepluch and published by . This book was released on 1962 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Research on Combustion of Solid Propellants written by Ray J. Muzzy and published by . This book was released on 1967 with total page 85 pages. Available in PDF, EPUB and Kindle. Book excerpt: The report describes theoretical and experimental studies to evaluate the effects of surface reactions on the acoustic response function of composite solid propellants. The AP oxidizer crystals were coated and the results showed coatings of Kel F and Viton reduce the acoustic response, the reduction increasing with increasing coating level. The effect of binder and curing agent on the response function was also investigated. Studies were also made on the effect of pressure on a carboxy-terminated polybutdiene-ammonium perchlorate propellant. The results indicated that over a pressure range from 100 to 500 psia both the maximum value of the acoustic response function and the frequency at which it occurs increased with increasing pressure. On the theoretical side the predictions from the model agreed well with experiment. Progress was made on the nonlinear analysis also. (Author).
Download or read book Government Reports Announcements written by and published by . This book was released on 1974 with total page 1000 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Federal Register written by and published by . This book was released on 1974-05 with total page 1912 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Continuous Oxidizer Regression Model for the Combustion of Composite Solid Propellants written by Joseph John Cor and published by . This book was released on 1987 with total page 218 pages. Available in PDF, EPUB and Kindle. Book excerpt: Over the past several decades, there has been a considerable effort to model the process occurring during the combustion of composite solid propellents. Accurate models able to predict the burning rate characteristics of solid propellents would be very valuable, as they would facilitate the design of solid rocket fuels by reducing the need for laboratory testing of different solid mixtures until a mixture with the right ballistic properties is found. Using a reliable analytical model, a propellent designer could, in theory, simply input key properties of a possible propellent formulation into the model, and the model would provide an accurate prediction of what the burning rate characteristics for the mixture would be. Earlier attempts at modeling the steady-state burning of composite solid propellents are reviewed, with an emphasis placed on the Beckstead, Derr, and Price (BDP) and Petite Ensemble Model (PEM). The Continuous Oxidizer Regression (COR) model is then described, which is a modification to the PEM model. The COR model's predictions for burning rate and pressure exponent are then compared to those of an actual solid composite propellent. The model predicts the general trends found in actual experimental data, but the model's output is found to be highly sensitive to the assumptions regarding surface geometry and flame formation, which are as yet not clearly known.
Download or read book Combustion Mechanisms of Wide Distribution Propellants written by Robert A Fredrick (Jr) and published by . This book was released on 1988 with total page 281 pages. Available in PDF, EPUB and Kindle. Book excerpt: The objective of this research is to describe the effects of oxidizer particle size distribution on the burning rate of solid propellants used in rocket motors. Current models over predict the burning rate of wide distribution (wide distribution denotes two oxidizer modes that have extreme differences in mean diameter) formulations by 40 to 200 percent indicating combustion mechanisms unique to this type of propellant. Four sets of AP/HTPB propellants were formulated to control the physical and chemical heterogenities characteristic of the propellant surface using 400 and 20 microns oxidizer particles. The propellants were tested at pressure levels from 0 to 2000 psig. An optical, distance measurement technique was developed and used to measure the local, non-steady surface deflagration of the propellant burning surface. The method uses a laser beam, synchronous detection, and closed-loop tracking to locate the surface in the hostile combustion environment. An acoustic emission technique determined average burning rates. Combustion phenomena were also accessed using high-speed photography and scanning electron microscopy. Keywords: Particle size distribution, Burning rate, Solid propellants, Rocket motors, Combustion mechanisms, AP/HTPB propellants, Laser diagnostics, Acoustic emissions, Scanning electron. (MJM).
Download or read book Challenges in Propellants and Combustion written by Kenneth K. Kuo and published by Begell House Publishers. This book was released on 1997 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Final Proceedings for the Fourth International Symposium on Special Topics in Chemical Propulsion 4-ISICP, 27 May 1996 - 31 May 1996. The Topics covered include: chemical kinetics of propellant combustion, environmental considerations in combustion of solid and liquid propellants, commercial application in the combustion of energetic materials, effective utilization of propellants, combustion diagnostics, and recycling.
Download or read book Tailoring the Plateau Burning Rates of Composite Propellants by the Use of Nanoscale Additives written by Matthew A. Stephens and published by . This book was released on 2010 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Composite propellants are composed of a solid oxidizer that is mixed into a hydrocarbon binder that when polymerized results in a solid mass capable of self-sustained combustion after ignition. Plateau propellants exhibit burning rate curves that do not follow the typical linear relationship between burning rate and pressure when plotted on a log-log scale, and because of this deviation their burning behavior is classified as anomalous burning. It is not unusual for solid-particle additives to be added to propellants in order to enhance burning rate or other properties. However, the effect of nano-size solid additives in these propellants is not fully understood or agreed upon within the research community. The current project set out to explore what possible variables were creating this result and to explore new additives. This thesis contains a literature review chronicling the last half-century of research to better understand the mechanisms that govern anomalous burning and to shed light on current research into plateau and related propellants. In addition to the review, a series of experiments investigating the use of nanoscale TiO2-based additives in AP-HTPB composite propellants was performed. The baseline propellant consisted of either 70% or 80% monomodal AP (223 [mu]m) and 30% or 20% binder composed of IPDI-cured HTPB with Tepanol. Propellants' burning rates were tested using a strand bomb between 500 and 2500 psi (34.0-170.1 atm). Analysis of the burning rate data shows that the crystal phase and synthesis method of the TiO2 additive are influential to plateau tailoring and to the apparent effectiveness of the additive in altering the burning rate of the composite propellant. Some of the discrepancy in the literature regarding the effectiveness of TiO2 as a tailoring additive may be due to differences in how the additive was produced. Doping the TiO2 with small amounts of metallic elements (Al, Fe, or Gd) showed additional effects on the burning rate that depend on the doping material and the amount of the dopant.
