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A Study Of The Effects Of Electric Fields On Solid Propellant Burning Rates
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Book Synopsis A Study of the Effects of Electric Fields on Solid Propellant Burning Rates by : Robert Frederick Bestgen (CAPT, USAF.)
Download or read book A Study of the Effects of Electric Fields on Solid Propellant Burning Rates written by Robert Frederick Bestgen (CAPT, USAF.) and published by . This book was released on 1970 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis A Study of the Effects of Electric Fields on Solid Propellant Burning Rates by : Robert F. Bestgen
Download or read book A Study of the Effects of Electric Fields on Solid Propellant Burning Rates written by Robert F. Bestgen and published by . This book was released on 1970 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis A Study of the Effects of Electric Fields on Solid Propellant Burning Rates by : Robert F. Bestgen
Download or read book A Study of the Effects of Electric Fields on Solid Propellant Burning Rates written by Robert F. Bestgen and published by . This book was released on 1970 with total page 316 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Effects of Electrostatic Fields on Flame Spread Rates of Solid Propellant by : Stewart R. Turner
Download or read book The Effects of Electrostatic Fields on Flame Spread Rates of Solid Propellant written by Stewart R. Turner and published by . This book was released on 1970 with total page 187 pages. Available in PDF, EPUB and Kindle. Book excerpt: This research effort deals with the effect of electric fields on the flame spread rate of igniting solid propellant. Previous investigators had postulated that the flame spread rate could be modified by the use of electric fields to direct ionic winds over the surface of the unignited propellant, thereby changing the unassisted flame spread rate. This postulate was supported by a limited number of tests. The current research was conducted to investigate the above postulate more fully and to develop a mathematical model representative of flame spread rates under the influence of electric fields. The experimental effort was directed toward the determination of three specific characteristics for each of four different formulations of solid propellant. The specific characteristics obtained were (1) charged particle (positive ion, negative ion, and electron) concentrations of the solid propellant flames, (2) electrostatic field plots of the flame zone and environs during flame spread tests and (3) flame spread rate variations over a wide range of applied voltage conditions for each of the four propellant formulations. (Author).
Book Synopsis Effects of Electric Fields on the Combustion of Solid Propellants by : J. L. Stones
Download or read book Effects of Electric Fields on the Combustion of Solid Propellants written by J. L. Stones and published by . This book was released on with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Scientific and Technical Aerospace Reports by :
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1972 with total page 958 pages. Available in PDF, EPUB and Kindle. Book excerpt: Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.
Download or read book STAR written by and published by . This book was released on 1965 with total page 2216 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis A Study of the Burning Rates of Composite Solid Propellants in Acceleration Fields by : Edward John Sturm
Download or read book A Study of the Burning Rates of Composite Solid Propellants in Acceleration Fields written by Edward John Sturm and published by . This book was released on 1968 with total page 225 pages. Available in PDF, EPUB and Kindle. Book excerpt: The average burning rates of a series of composite solid propellants were measured in acceleration fields up to 1000 G using a combustion bomb mounted on a centrifuge. The propellants were burned at constant pressures of 500, 1000, and 1500 psia. Specially prepared motors allowed the study of the effect of simultaneous erosive and acceleration induced burning rate increases. The burning rates of both the non-metallized and the majority of the metallized propellants were found to depend on acceleration. The effect of acceleration was found to depend on the basic burning rates of the propellants and the aluminum and oxidizer particle sizes and weight percentages. The burning rates of two very fast burning rate propellants were found to be essentially independent of acceleration. The erosion sensitivity of a propellant was found to decrease with increasing acceleration. A model was developed which successfully correlates the experimental results obtained for the non-metallized propellants. The experimental results for the metallized propellants could not be correlated by either of two models proposed by other investigators. This result indicates that a more complex model is required to explain the observed acceleration effects for metallized propellants. (Author).
Book Synopsis An Optical Bomb Study of the Combustion of Solid Propellants in High Acceleration Fields by : Merrill K. King
Download or read book An Optical Bomb Study of the Combustion of Solid Propellants in High Acceleration Fields written by Merrill K. King and published by . This book was released on 1968 with total page 13 pages. Available in PDF, EPUB and Kindle. Book excerpt: An experimental study of the effects of acceleration fields on the burning rate of solid propellant grains is being conducted. A variety of formulations are being studied over a range of pressures and acceleration loadings; the results will eventually be used to evaluate theoretical models of the process or to form the basis for improved models. The acceleration vector, produced by spinning a disc-shaped propellant in a large volume optical bomb, can be directed perpendicularly into or away from the burning surface. Three formulations have been studied to date under both vector orientations. (Author).
Book Synopsis Effects of Acceleration and Velocity Fields on the Burning Rates of Composite Solid Propellants by : Kuriakose Vargheese
Download or read book Effects of Acceleration and Velocity Fields on the Burning Rates of Composite Solid Propellants written by Kuriakose Vargheese and published by . This book was released on 1971 with total page 194 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Experimental Investigation of the Effect of Aluminum Size and Loading on the Burning Rate of Solid Propellants Under Acceleration by : G. Burton Northam
Download or read book Experimental Investigation of the Effect of Aluminum Size and Loading on the Burning Rate of Solid Propellants Under Acceleration written by G. Burton Northam and published by . This book was released on 1969 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Effects of Normal Acceleration on Transient Burning-rate Augmentation of an Aluminized Solid Propellant by : G. Burton Northam
Download or read book Effects of Normal Acceleration on Transient Burning-rate Augmentation of an Aluminized Solid Propellant written by G. Burton Northam and published by . This book was released on 1972 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt: Instantaneous burning rate data for a polybutadiene acrylic acid propellant, containing 16 weight percent aluminum, were calculated from the pressure histories of a test motor with 96.77 sq cm of burning area and a 5.08-cm-thick propellant web. Additional acceleration tests were conducted with reduced propellant web thicknesses of 3.81, 2.54, and 1.27 cm. The metallic residue collected from the various web thickness tests was characterized by weight and shape and correlated with the instantaneous burning rate measurements. Rapid depressurization extinction tests were conducted in order that surface pitting characteristics due to localized increased burning rate could be correlated with the residue analysis and the instantaneous burning rate data. The acceleration-induced burning rate augmentation was strongly dependent on propellant distance burned, or burning time, and thus was transient in nature. The results from the extinction tests and the residue analyses indicate that the transient rate augmentation was highly dependent on local enhancement of the combustion zone heat feedback to the surface by the growth of molten residue particles on or just above the burning surface. The size, shape, and number density of molten residue particles, rather than the total residue weight, determined the acceleration-induced burning rate augmentation.
Book Synopsis Study of Piezoelectricity Applications in Solid Propellants by : David Drewniak
Download or read book Study of Piezoelectricity Applications in Solid Propellants written by David Drewniak and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: New energetic compositions are being investigated for use in solid rocket motors that utilize the piezoelectric properties of polyvinylidene fluoride (PVDF) to tailor the desired sensitivity of solid propellants and energetics. The ability to change a propellants sensitivity could allow solid motors to be ``safed'' prior to use, be used to modulate the thrust of a motor in-flight by changing the burn rate of the propellant, and enable solid state thrust vector control by changing the burn rate asymmetrically. The thesis focuses on the effect piezoelectricity has on the sensitivity to ignition by laser radiation of 10\% wt nanoaluminum/P(VDF-TrFE) composite films. Results from this study show that both the application of an electric field and the activation of the piezoelectric properties of PVDF sensitize the composite as measured by a decrease in a mean time to ignition, with piezoelectricity activation sensitizing the composite to a greater degree than only an applied electric field. Additional research was performed on the effect of piezoelectricity on the steady state burn rate of nanoaluminum/PVDF-based energetic films. A unique two-flame front phenomena was found to occur with some nAl particles, but not others. It was hypothesized that a non-uniform nAl particle distribution resulting from agglomeration was the cause of the two-flame phenomena. Finally, a vastly different experiment was developed to simulate the effects of mechanical oscillation of a propellant surface that may be produced by using piezoelectric to vibrate the surface. Aluminum loaded ammonium perchlorate solid propellant was tested at frequencies of 100 and 500Hz at peak-to-peak displacements of 20, 40, and 80 $\mu$m for 100Hz and 20 $\mu$m for 500Hz. It was found that the burn rate increased by $\sim$8\% over the baseline for 100Hz at a displacement of 80 $\mu$m.
Download or read book Technical Abstract Bulletin written by and published by . This book was released on with total page 912 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Cinematographic Study of Solid Propellant Combustion in an Acceleration Field by : Raymond Charles Schroeder (Jr)
Download or read book Cinematographic Study of Solid Propellant Combustion in an Acceleration Field written by Raymond Charles Schroeder (Jr) and published by . This book was released on 1970 with total page 43 pages. Available in PDF, EPUB and Kindle. Book excerpt: The influence of an acceleration field on the combustion rate of a composite solid propellant when directed normally and into the burning surface was recorded by high speed cinematography. One-half to one-inch long propellant strands with 1/4-in by 1/4-in cross sections were burned and photographed at pressures of 200 psi and 500 psi while subjected to normal acceleration fields of 0 g and 75 g. Aluminized propellants were primarily utilized in this investigation; however, the experimental apparatus and the techniques used proved suitable for general propellant studies. Propellants burning in acceleration fields of 0 g and 75 g were successfully filmed at frame rates of 4500 pictures per second. The designed magnification factor and the quality of the motion pictures produced provided an optical definition of particle sizes to 100 microns. This film resolution allowed an optical analysis of the acceleration effects on propellant burning rates. (Author).
Download or read book Proceedings written by and published by . This book was released on 1971 with total page 436 pages. Available in PDF, EPUB and Kindle. Book excerpt: