Download or read book Interior Fluid Dynamics of Liquid Filled Projectiles written by Thorwald Herbert and published by . This book was released on 1989 with total page 113 pages. Available in PDF, EPUB and Kindle. Book excerpt: Theoretical and numerical studies were conducted to analyze the flow in spinning and coning liquid-filled payload cylinders and to provide efficient tools for estimating and calculating the liquid moments as input data for flight simulations. Earlier analytical studies for cylinders of large aspect ratio were extended to the nonlinear problem to provide estimates for all moments. This perturbation analysis is currently used to investigate the influence of partial liquid fills, central rods, and two-fluid fills on the moments. A new method was developed to obtain the moments from volume integrals rather than surface integrals and thus increase the accuracy of the results at fixed numerical approximation. An efficient spectral code was developed for routine application to solve the three-dimensional Navier-Stokes equations. Utility of this code for efficient flight simulations has been demonstrated. The code has been applied to investigate liquid moments, velocity field, and pressure field in situations of pure forcing as well as resonance with inertial waves at Reynolds numbers up to 2000. For the linearized problem, a simplified set of equations has been developed that permits closed-form solutions for spatial eigenfunctions and highly efficient solution by spectral methods. Keywords: Projectile stability; Liquid payloads; Aeroballistics.

Download or read book Liquid filled Projectile Design written by and published by . This book was released on 1969 with total page 248 pages. Available in PDF, EPUB and Kindle. Book excerpt: " ... deals with the dynamics of liquid-filled projectiles which are known to behave in an unpredictable manner in flight."--Pref.

Download or read book Internal Fluid Dynamics Within a Nonspinning Partially Liquid Filled Shell Due to Burster Rupture written by Paul Weinacht and published by . This book was released on 1987 with total page 47 pages. Available in PDF, EPUB and Kindle. Book excerpt: This forced liquid projectile is being directed by the Munitions Branch of the U.S. Army Chemical Research, Development and Engineering Center (CRDEC). The Computational Aerodynamics Branch, Launch and Flight Division U.S. Army Ballistic Research Laboratory (BRL), has been tasked to determine the internal fluid dynamics within a partially liquid-filled shell subject to large rapidly applied pressures which result from internal burster tube rupture. The main area of concern is the determination of the time history of the internal pressure on the shell sidewalls and base. A numerical model has been developed to simulate the internal fluid dynamics of this partially liquid-filled configuration. This numerical model solves the quasi one-dimensional Euler equations and a equation of state for liquid using the explicit MacCormack numerical technique. Results have been generated for an internal shell geometry currently being tested by the Terminal Ballistics Division (TBD), BRL. Comparisons are made between the numerically predicted pressure levels and the pressure measurements performed by TBD. Keywords: Liquid filled shells, Compressible liquids, Fluid mechanics.

Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1992 with total page 284 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Dynamics of Liquid Filled Projectiles written by George Schlenker and published by . This book was released on 1976 with total page 131 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report presents a collection of analytic models which treat various aspects of the dynamics of liquid-filled, spin-stabilized projectiles. Several numerical examples are given applicable to eight-inch ammunition. Although idealized, these examples may provide understanding of the behavior of real systems such as the XM736 binary round. Chapter 1 examines the change in inertial characteristics with a change in liquid configuration. Chapter 2 treats the dynamics of spinup of the liquid fill. Also considered are the range and deflection sensitivity to configuration change, and the question of 'ballistic similitude' with a comparable solid-filled projectile. The distribution of energy in the liquid and an approximation for the frequency of a fundamental vibratory mode of the liquid are addressed in Chapter 3. The frequency of vibration is compared with precessional and nutational frequencies of the projectile during flight to assess the likelihood of stability problems. Insofar as the approximations made here are applicable, one can conclude that the XM736 projectile is a reasonable ballistic match to the M509. Difference in mean point of impact can be corrected by small adjustments in aiming. The XM736 is judged to be ballistically stable but will likely have a somewhat larger ballistic dispersion than either the M509 or M106 projectiles. (Author).

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Download or read book Army RD A Magazine written by and published by . This book was released on 1985 with total page 428 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Army RD A Bulletin written by and published by . This book was released on 1986 with total page 230 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Government Reports Announcements Index written by and published by . This book was released on 1990-05 with total page 738 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book AD written by and published by . This book was released on 1982 with total page 72 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Transactions of the Conference of Army Mathematicians written by and published by . This book was released on 1982 with total page 564 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Research in Progress written by and published by . This book was released on 1978 with total page 834 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 1990 with total page 1608 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 1976 with total page 968 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Progress In Astronautics and Aeronautics written by F. Shahrokhi and published by AIAA. This book was released on 1990 with total page 416 pages. Available in PDF, EPUB and Kindle. Book excerpt:

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