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An Improved Method For The Measurement Of Solid Propellant Strand Burning Rates In Closed Bombs
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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 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 U.S. Government Research Reports by :
Download or read book U.S. Government Research Reports written by and published by . This book was released on 1963 with total page 302 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 Solid Rocket Motor Performance Analysis and Prediction by : William H. Miller
Download or read book Solid Rocket Motor Performance Analysis and Prediction written by William H. Miller and published by . This book was released on 1971 with total page 124 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 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 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 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 Solid Propellant Subscale Burning Rate Test Techniques and Hardware for U.S. and Selected NATO Facilities by : Ronald S. Fry
Download or read book Solid Propellant Subscale Burning Rate Test Techniques and Hardware for U.S. and Selected NATO Facilities written by Ronald S. Fry and published by . This book was released on 2001 with total page 141 pages. Available in PDF, EPUB and Kindle. Book excerpt: Current burning rate measurement test techniques and subscale test hardware used within the NATO community are reviewed and recommendations are made to support improved prediction of internal ballistics of a full-scale solid propellant motor. The NATO Research and Technology Organization (RTO), Advanced Vehicle Technology (AVT), Working Group (WG) 016 (formerly AGARD/PEP Working Group #27) undertook to evaluate methods used within the NATO propulsion community to measure burning rate in solid propellant rocket systems. The purpose was to identify similarities and differences among the member nations. The WG 016 sought to contribute to improvements in the burning rate tools by addressing issues that have remained unresolved in the solid propulsion industry for over 40 years: (1) Better understanding of burning rate, r(beta)(p, T(omega), data from various facilities to ease the comparison of propellants from various manufacturers and to improve international exchanges and cooperation. (2) Improved measurement accuracy and reliability to allow a decrease in the number of tests (and associated time and cost) and improved control of manufacturing and quality assurance and the assessment of aging. 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 34th AIAA/ASME/SAE/ASEE Joint Propulsion Conference & Exhibit by :
Download or read book 34th AIAA/ASME/SAE/ASEE Joint Propulsion Conference & Exhibit written by and published by . This book was released on 1998 with total page 560 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Improved Strand Burn Rate Reproducibility Using a New Preparation Methodology for Paint-based Inhibitors by : Andrew H. Hart
Download or read book Improved Strand Burn Rate Reproducibility Using a New Preparation Methodology for Paint-based Inhibitors written by Andrew H. Hart and published by . This book was released on 2003 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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:
Download or read book AIAA 90-1835 - AIAA 90-1881 written by and published by . This book was released on 1990 with total page 352 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 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:
