Download or read book Numerical Solution of Three Solid Propellant Combustion Models During a Gun Pressure Transient written by Douglas E. Kooker and published by . This book was released on 1977 with total page 50 pages. Available in PDF, EPUB and Kindle. Book excerpt: All current gun interior ballistics computer programs rely on, and are sensitive to, the steady state burning rate 'law', r = ap to the n power. It is not clear that this is a valid representation in a highly transient pressure environment. To estimate possible dynamic effects, numerical solutions for three thermal-wave combustion models (KTSS, Levine/Culick, Kooker/Zinn) are obtained for a series of example cases where the imposed pressure variation at the edge of the flame zone is prescribed by an experimental pressure-time history from the 105mm Gun M68. The results obtained with several different numerical solution methods indicate that (1) at low pressure (early time) the instantaneous propellant burning rate can be much greater than ap to the n power; while at high pressure the burning rate returns asymptotically to ap to the n power, and (2) burning rate 'runaway' is a numerical difficulty and is not a solution to the combustion models. The effect of dynamic burning rate on closed-bomb measurements is estimated numerically with a simple model.

Download or read book 16th JANNAF Combustion Meeting Naval Postgraduate School Monterey California September 10 14 1979 DDT and gun propellants unclassified written by and published by . This book was released on 1979 with total page 772 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1995 with total page 500 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Response of Three Types of Transient Combustion Models to Gun Pressurization written by Carl W. Nelson and published by . This book was released on 1977 with total page 15 pages. Available in PDF, EPUB and Kindle. Book excerpt: Three types of models for transient solid propellant combustion are applied under an imposed pressure history of a 105 mm tank gun. The three types are: (1) dp/dt dependence, (2) Quasi Steady Heat Feedback One Dimensional (QSHOD), and (3) Zeldovich. Each predicts a qualitatively different response for the same propellant thermal and thermodynamic properties under the same imposed pressure history. (Author).

Download or read book AGARD Advisory Report written by North Atlantic Treaty Organization. Advisory Group for Aerospace Research and Development and published by . This book was released on 1982 with total page 76 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book AIAA 79 0140 AIAA 79 0219 written by and published by . This book was released on 1979 with total page 856 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Journal of Heat Transfer written by and published by . This book was released on 1979 with total page 778 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Gun Propulsion Technology written by Ludwig Stiefel and published by AIAA (American Institute of Aeronautics & Astronautics). This book was released on 1988 with total page 600 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Interior Ballistics of Guns written by Herman Krier and published by . This book was released on 1979 with total page 424 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Heat Transfer in Combustion Systems 1990 written by Bakhtier Farouk and published by . This book was released on 1990 with total page 104 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book COSMIC Software Catalog written by and published by . This book was released on 1987 with total page 444 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Government Reports Annual Index written by and published by . This book was released on 1978 with total page 1266 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sections 1-2. Keyword Index.--Section 3. Personal author index.--Section 4. Corporate author index.-- Section 5. Contract/grant number index, NTIS order/report number index 1-E.--Section 6. NTIS order/report number index F-Z.

Download or read book Analysis of Propellants and Explosives written by and published by . This book was released on 1986 with total page 1090 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Applied Mechanics Reviews written by and published by . This book was released on 1980 with total page 932 pages. Available in PDF, EPUB and Kindle. Book excerpt:

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 Proceedings of the 2nd International Conference on Mechanical System Dynamics written by Xiaoting Rui and published by Springer Nature. This book was released on with total page 4383 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book CFD Modelling of Solid Propellant Ignition written by and published by . This book was released on 1907 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Solid propellant is the highly energetic fuel burnt in the combustion chamber of ballistic weapons. It is manufactured, for this purpose, in either granular or stick form. Internal ballistics describes the behavior within the combustion chamber throughout the ballistic cycle upto projectile exit from the muzzle of the gun barrel. Over the last twenty years this has been achieved by modelling the process using two-phase flow equations. The solid granules or sticks constitute the first phase, which can be assumed to be incompressible over typical pressure ranges within the chamber. The gas-phase is composed of both the original ambient gas contained around the propellant and additional gas produced by the propellant gasifying on heating. Equations can be derived that describe the conservation of mass, momentum and energy in terms of average flow variables. The equations are a highly non-linear system of partial-differential- equations. High-speed flow features are observed in internal ballistics and ordinary fini te- difference methods are unsuitable numerical methods due to inaccurate prediction of discontinuous flow features. Modern shock-capturing methods are employed, which solve the system of equations in conservation form, with the ability to capture shocks and contact discontinuities. However, although the numerical solutions compare well with experiment over the bulk of the combustion chamber, the ignition models used in internal ballistics are unreliable. These are based on either gas or solid-surface temperature achieving some empirically measured 'ignition temperature' after which the propellant burns according to an empirical pressure dependent burning law. Observations indicate that this is not an adequate representation of ignition. Time differences between first solid gasification and ignition imply two distinct processes occurring.]Further, ignition occurring in gas-only regions indicates that ignition is controlled by a gas-phase reaction. This thesi.