Read Books Online and Download eBooks, EPub, PDF, Mobi, Kindle, Text Full Free.
Solid Propellant Burning Rate Measurement In A Closed Bomb
Download Solid Propellant Burning Rate Measurement In A Closed Bomb full books in PDF, epub, and Kindle. Read online Solid Propellant Burning Rate Measurement In A Closed Bomb ebook anywhere anytime directly on your device. Fast Download speed and no annoying ads. We cannot guarantee that every ebooks is available!
Book Synopsis Solid Propellant Burning Rate Measurement in a Closed Bomb by :
Download or read book Solid Propellant Burning Rate Measurement in a Closed Bomb written by and published by . This book was released on 1975 with total page 53 pages. Available in PDF, EPUB and Kindle. Book excerpt: Experiments show that the burning rate of solid propellants is a function of the pressure under which the burning takes place. An often used method to determine that burning rate function is to burn a sample of the propellant in a closed container and to register the corresponding pressure-time data. With the aid of formulas from thermodynamic theory these observations can be manipulated to yield the desired parameters of the burning rate function. This analysis is typically done under a number of restrictive assumptions, e.g., the assumption of constant temperature in the container throughout the experiment. In spite of such assumptions the corresponding algorithms published are complicated and an error analysis of the results has apparently never been reported. In the present paper new formulas are derived under relaxed assumptions. With the aid of these formulas the data analysis is reduced to a curve fitting task. For such tasks standard theories and computer programs are available, which furnish the unknown parameters of the burning rate function together with estimates of their variances and co-variances. The new formulas can be replaced by simpler ones under conditions, which are controllable by the design of the experiment. It is found that for such simplifications the temperature's behavior is not relevant. In general the simplifications are permissible if the maximum pressure achieved during the experiment remains essentially smaller than the chemical energy released per unit volume of the propellant. The latter is typically of the order of 10 to 10th power Pa (10 to 5th power). An example illustrates the application of the new algorithm.
Book Synopsis Solid propellant burning rate measurement in a closed bomb by : Alvars Celmins
Download or read book Solid propellant burning rate measurement in a closed bomb written by Alvars Celmins and published by . This book was released on 1975 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis An Improved Method for the Measurement of Solid Propellant Strand-burning Rates in Closed Bombs by : D. H. Stewart
Download or read book An Improved Method for the Measurement of Solid Propellant Strand-burning Rates in Closed Bombs written by D. H. Stewart and published by . This book was released on 1963 with total page 10 pages. Available in PDF, EPUB and Kindle. Book excerpt: A new method for determining propelland strand burning rates without the use of timing wires has been developed. It was found that when the cross-sectional area of the strand is sharply varied at known intervals, the burning rate can be obtained from assessment of the resulting pressure-time trace. Results of the new method are within 1% of the standard wire technique. The method is applicable to ''difficult'' propellant systems and offers advantages of lower cost, higher reliability, and safety. (Author).
Book Synopsis Analysis of Burning Rate Phenomena and Extinguished Solid Propellants from an Interrupted Closed Bomb with Plasma Igniter by : Robert J. Lieb
Download or read book Analysis of Burning Rate Phenomena and Extinguished Solid Propellants from an Interrupted Closed Bomb with Plasma Igniter written by Robert J. Lieb and published by . This book was released on 2001 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Experimental Study of the Burning Rates of Some Solid Propellants by Using a Closed Bomb by : H. L. H. Collins
Download or read book Experimental Study of the Burning Rates of Some Solid Propellants by Using a Closed Bomb written by H. L. H. Collins and published by . This book was released on 1947 with total page 90 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Continuous Measurement of Solid Propellant Burning Rate in a Rocket Motor by : C.F. Yin
Download or read book Continuous Measurement of Solid Propellant Burning Rate in a Rocket Motor written by C.F. Yin and published by . This book was released on 1968 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis High Pressure Solid Propellant Combustion Studies Using a Closed Bomb by : Richard B. Cole
Download or read book High Pressure Solid Propellant Combustion Studies Using a Closed Bomb written by Richard B. Cole and published by . This book was released on 1965 with total page 1 pages. Available in PDF, EPUB and Kindle. Book excerpt: A self-pressurizing closed-bomb system is described for observing deflagration characteristics of solid propellants at pressures as high as 200,000 psi. Regression rates are obtained by microwave interferometry, a newly-adapted method which eliminates the need for introducing foreign bodies in the forms of wires, probes, etc., into the system. Pressure measurements are made with strain gauges mounted on the exterior of the bomb body, obviating many sealing problems associated with conventional transducers. The relative merits of the available instrumentation are discussed; the principles and limitation of the interferometry technique are treated in detail. Preliminary r-P data for a polybutadiene-acrylic acid composite propellant are reported up to 60,000 psi; results at higher pressures are indeterminate, owing to leakage and lack of high-pressure dynamic calibration equipment. (Author).
Book Synopsis Numerical Solution of Three Solid Propellant Combustion Models During a Gun Pressure Transient by : Douglas E. Kooker
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.
Book Synopsis Evaluation of Methods for Solid Propellant Burning Rate Measurements by :
Download or read book Evaluation of Methods for Solid Propellant Burning Rate Measurements written by and published by . This book was released on 2002 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Closed-Bomb Combustion of Hivelite-Based, Very High Burn Rate (VHBR) Propellant by : E. B. Fisher
Download or read book Closed-Bomb Combustion of Hivelite-Based, Very High Burn Rate (VHBR) Propellant written by E. B. Fisher and published by . This book was released on 1985 with total page 118 pages. Available in PDF, EPUB and Kindle. Book excerpt: An experimental investigation of the combustion characteristics of a Hivelite-based, very-high-burn-rate (VHBR) propellant was conducted. The experiments were performed in a closed chamber, called the VHBR bomb, that was specially designed and constructed for these experiments. The device was designed with the same diameter as the propellant samples in order to maintain one dimensional combustion processes and transient wave phenomena to simplify subsequent interpretation and analysis. Propellant combustion was characterized by a low burn rate (about 1 m/s) until a pressure in the vicinity of 15-20 MPa is reached. After this pressure, which may represent the propellant crushing or break pressure, the combustion rate accelerated to levels from 10 to 180 m/s, depending on other test parameters. Tests conducted at different loading densities indicated that combustion rate was a strong function of pressure. Variation of sample weight at constant loading density demonstrated that increasing the amount of unburned propellant at the time the break pressure was reached also causes burn rate and thrust to increase. A coating that makes the outside surface of the sample slippery tended to reduce the apparent burn rate but use of a coating which retarded transmission of gas pressure along the periphery of the sample increased the apparent burn rate as well as thrust. Change of mounting interface properties caused significant differences in the dynamic characteristics leading to increased thrust.
Book Synopsis Measurement of Solid Propellant Burning Rates in a Slab-motor Environment Using a Microwave Technique by : Joseph Joshua Kliger
Download or read book Measurement of Solid Propellant Burning Rates in a Slab-motor Environment Using a Microwave Technique written by Joseph Joshua Kliger and published by . This book was released on 1984 with total page 436 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Evaluation of Methods for Solid Propellant Burning Rate Measurement by :
Download or read book Evaluation of Methods for Solid Propellant Burning Rate Measurement written by and published by . This book was released on 2002 with total page 22 pages. Available in PDF, EPUB and Kindle. Book excerpt: The NATO Research and Technology Organization (RTO), Advanced Vehicle Technology (AVI), Working Group (WG) 016 (formerly AGARD/PEP Working Group (27) undertook to evaluate methods in use within the NATO propulsion community to measure burning rate in solid propellant rocket systems, with the purpose of identifying similarities and differences between the participating nations. This WG was formed in 1996, consisting of active representatives from 6 of the 15 member nations of NATO, with inputs accepted from 4 other member nations and a couple non-member nations. The NATO RTO/AVT WG 016 sought to contribute to improvements in the burning rate tools to address issues that have plagued the solid propulsion industry for over 40 years. This paper reviews the final results of this study by summarizing the objectives, approach, findings, and recommendations of this working group based on activity from October 1997 to March 2001. Recommendations are reviewed on direct and non-intrusive burning rate measurement methods, data analysis, and performance scaling to support improved prediction of internal ballistics of a full-scale solid propellant motor. AVT WG 016 activities have identified that manufacturer burning rate data may not easily be compared without accounting for industry-wide differences in subscale devices, test methods and scaling analysis methods. The WG recommends the NATO propulsion community review these findings as a means of advancing their own burning rate measurement and analysis methods.
Book Synopsis Closed-bomb Combustion of Hivelite-based Very High Burn Rate (VHBR) Propellant by : Calspan Corporation
Download or read book Closed-bomb Combustion of Hivelite-based Very High Burn Rate (VHBR) Propellant written by Calspan Corporation and published by . This book was released on 1985 with total page 117 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Measurement of Solid Propellant Burning Rates During Rapid Depressurization by : Albert Thurston Clary
Download or read book Measurement of Solid Propellant Burning Rates During Rapid Depressurization written by Albert Thurston Clary and published by . This book was released on 1971 with total page 228 pages. Available in PDF, EPUB and Kindle. Book excerpt: A microwave continuous measurement technique has been used to measure burning rates of a carboxyl-terminated polybutadiene and ammonium perchlorate composite solid propellant during rapid decompression. A microwave signal oscillating at a known source frequency is passed through the end of a burning propellant strand opposite the burning surface and allowed to reflect off the burning surface. By continuously comparing the phase angle of this reflected signal with the phase angle of another signal oscillating at the orginal source frequency, a relative phase angle of another signal oscillating at the original source frequency, a relative phase angle between the two signals is obtained. The rate of change of this relative phase angle with time is proportional to the propellant's burning rate. Possible errors were investigated and conclusions reached concerning them. (Author).
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 1995 with total page 704 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Round Robin Results of the Closed Bomb and Strand Burner by : Arpad A. Juhasz
Download or read book Round Robin Results of the Closed Bomb and Strand Burner written by Arpad A. Juhasz and published by . This book was released on 1982 with total page 193 pages. Available in PDF, EPUB and Kindle. Book excerpt: A series of exercises was undertaken by participants from the three services, private industry, and academia to assess the comparability of propellant burning rate data among installations. The study involved both the closed bomb and high pressure strand burner techniques. Identical propellant formulations were distributed to the participants, burned, and the data converted to burning rates using methods prevailing at each installation. In some cases closed bomb as well as strand burner results showed excellent agreement (to + or - 2.5 percent on the average and to within + or - 1 percent mid-range). In less favorable cases closed bomb burning rates from different installations exhibited two or three times as much scatter. In one case there were significant differences between closed bomb and strand burner data. For the closed bomb data, variations could be linked to experimental factors such as loading density, sample quickness, and ignition parameters, as well as post-acquisition data manipulation techniques such as smoothing and differentiation. (Author).
Book Synopsis The Demonstration of an Ultrasonic Technique to Measure Solid Propellant Burning Rates Under Actual Combustion Conditions by : Hubbert Jackson Hale
Download or read book The Demonstration of an Ultrasonic Technique to Measure Solid Propellant Burning Rates Under Actual Combustion Conditions written by Hubbert Jackson Hale and published by . This book was released on 1967 with total page 170 pages. Available in PDF, EPUB and Kindle. Book excerpt:
