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Automatic Particle Sizing From Rocket Motor Holograms
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Book Synopsis Automatic Particle Sizing from Rocket Motor Holograms by :
Download or read book Automatic Particle Sizing from Rocket Motor Holograms written by and published by . This book was released on 1990 with total page 90 pages. Available in PDF, EPUB and Kindle. Book excerpt: Microscopic particles within an optical hologram reconstruction have been successfully measured using an image digitizer and a PC/AT computer. The hologram was recorded during a test burn of some solid rocket fuel and captured a 2 in x 2 in volume of burning particles as they lift from the fuel surface during combustion. The computer processes the digitized images using feature identification algorithms and sizing in the feature's horizontal dimension, its vertical dimension and area. The operation of the algorithms have been validated against calibration objects. Statistical tests show that about 1,300 particles from several image frames are required to obtain a representative size distribution. Overlying speckle degrades the resolution of the image and can be reduced by a variety of techniques. The performance of these speckle-reduction techniques has been measured and compared in the areas of speckle reduction, loss of resolution, and processing time. Program sizes and processing times have been compared for both FORTRAN and C-language versions of the processing program.
Book Synopsis Automatic Measurement of Particles from Holograms Taken in the Combustion Chamber of a Rocket Motor by :
Download or read book Automatic Measurement of Particles from Holograms Taken in the Combustion Chamber of a Rocket Motor written by and published by . This book was released on 1988 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Performance of solid propellants in rocket motors is increased by the addition of aluminum and additives (aluminum oxide, zirconium, and so on). Some of the original metal and metal oxides are found in the combustion chamber (from the surface of the propellant to the nozzle exit). The increased propellant performance is related to its particle size distribution. This thesis describes the procedure used for the automatic measurement of particles from holograms taken in the combustion chamber of a rocket motor while firing. It describes the investigation done on two averaging techniques used to reduce speckle noise, capturing the image focused on a spinning mylar disk and software averaging of several image frames. The spinning disk and software averaging of several image frames. The spinning disk technique proved superior for this application. The Kolmogorov-Smirnov two-sample test is applied to different particle samples in order to find an estimate of the number of particles required to obtain a stable distribution function. The number of particles is calculated and given. The last part of this study shows real particle distributions in the form of frequency histograms. Keywords: Solid propellant rocket engines, Propellant grains. (aw).
Book Synopsis Automatic Measurement of Particles from Holograms Taken in the Combustion Chamber of a Rocket Motor by : Denis Joseph Gaston Carrier
Download or read book Automatic Measurement of Particles from Holograms Taken in the Combustion Chamber of a Rocket Motor written by Denis Joseph Gaston Carrier and published by . This book was released on 1988 with total page 85 pages. Available in PDF, EPUB and Kindle. Book excerpt: Performance of solid propellants in rocket motors is increased by the addition of aluminum and additives (aluminum oxide, zirconium, and so on). Some of the original metal and metal oxides are found in the combustion chamber (from the surface of the propellant to the nozzle exit). The increased propellant performance is related to its particle size distribution. This thesis describes the procedure used for the automatic measurement of particles from holograms taken in the combustion chamber of a rocket motor while firing. It describes the investigation done on two averaging techniques used to reduce speckle noise, capturing the image focused on a spinning mylar disk and software averaging of several image frames. The spinning disk and software averaging of several image frames. The spinning disk technique proved superior for this application. The Kolmogorov-Smirnov two-sample test is applied to different particle samples in order to find an estimate of the number of particles required to obtain a stable distribution function. The number of particles is calculated and given. The last part of this study shows real particle distributions in the form of frequency histograms. Keywords: Solid propellant rocket engines, Propellant grains. (aw).
Book Synopsis Automatic Data Retrieval from Rocket Motor Holograms by : Emin Sami Orguc
Download or read book Automatic Data Retrieval from Rocket Motor Holograms written by Emin Sami Orguc and published by . This book was released on 1987 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis describes a technique of obtaining particle size information from holograms of combustion products. These data are needed to improve predictive capabilities of propellant performance, to provide input related to ammonium perchlorate (AP) - aluminum interactions for steady-state combustion models and to provide in motor particle size distributions to allow more accurate predictions of damping in stability analysis and two phase flow and exhaust plume signature. This study describes the use of Itex/PC software for the filtering and processing of the hologram images to reduce speckle and also, improves a Fortran program which had been written before to extract the particle feature size data from the modified image. The final step shows the statistical particle feature data exhibition by using the STATGRAPHICS (Statistical Graphics System) software. Keywords: Hologram, Image analysis, Speckle, Image action, STATGRAPHICS, Aluminum, Combustion chambers, Solid rocket propellants, Theses, Speckle interferometry. (jes).
Book Synopsis The Techniques of Holographic Particle Sizing by : Robert L. Kurtz
Download or read book The Techniques of Holographic Particle Sizing written by Robert L. Kurtz and published by . This book was released on 1973 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt: Depending on the mechanism of particle production, the resultant particle size and velocity distribution may range over several orders of magnitude. In general, if particle size information is desired from a given type generator, one must resort to some form of experimental determination of the distribution. If the source of particle production is a dynamic one involving a reasonable volume, holography provides a tailor-made particle size and velocity distribution detector. This is evidenced by the fact that holography allows the entire volume to be recorded on one exposure without any interference with the volume of interest. Herein lies a very important characteristic of the holographic particle detection technique: It provides a holographic nondestructive testing technique in the fullest sense of the definition of nondestructive testing. This report provides a description of three different systems useful in this technique and includes the experimental results from one of the holographic systems which was used to detect particle size and velocity distribution from the Skylab waste tank.
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 1994 with total page 892 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Practical Holography written by and published by . This book was released on 1995 with total page 428 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Automated Reduction of Data from Images and Holograms by :
Download or read book Automated Reduction of Data from Images and Holograms written by and published by . This book was released on 1987 with total page 666 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book NASA Tech Brief written by and published by . This book was released on 1963 with total page 1132 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Particle Sizing in a Solid Rocket Motor Using the Management of Scattered Light by :
Download or read book Particle Sizing in a Solid Rocket Motor Using the Management of Scattered Light written by and published by . This book was released on 1985 with total page 63 pages. Available in PDF, EPUB and Kindle. Book excerpt: A previous study discussed the formulation of the theory for the scattering properties in the general case of particles of arbitrary size and refractive index occurring in a polydispersion of finite optical depth. Roberts and Webb concluded that three volume-surface mean diameter (Sauter) D sub 32 of the polydispersion may be determined from the intensity of diffraction scattered light from spherical particles. An experimental investigation was conducted to determine the feasibility of measuring the change in particle size across the exhaust nozzle of a small solid propellant rocket motor. Light scattering measurements were made at small forward angles at the entrance and exit of the exhaust nozzle. The experimental technique was found to be practical, especially if used in conjunction with measurements of transmitted light of multiple wave lengths. However, the determination of D sub 32 is difficult in the motor environment and is biased toward the larger particles in the size distribution. Particle size measurements were in reasonable agreement with sizes determined from collected exhaust products. Recommendations for further improvement of the apparatus are made. Keywords: Diffractively scattered light; Particle sizing.
Book Synopsis Particle sizing in a solid rocket motor using the measurement of scattered light by : Abubakar Kertadidjaja
Download or read book Particle sizing in a solid rocket motor using the measurement of scattered light written by Abubakar Kertadidjaja and published by . This book was released on 1985 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book SPIE ... Publications Index written by and published by . This book was released on 1992 with total page 720 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Energy Research Abstracts written by and published by . This book was released on 1988 with total page 1224 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Engineering Index Annual written by and published by . This book was released on 1992 with total page 2264 pages. Available in PDF, EPUB and Kindle. Book excerpt: Since its creation in 1884, Engineering Index has covered virtually every major engineering innovation from around the world. It serves as the historical record of virtually every major engineering innovation of the 20th century. Recent content is a vital resource for current awareness, new production information, technological forecasting and competitive intelligence. The world?s most comprehensive interdisciplinary engineering database, Engineering Index contains over 10.7 million records. Each year, over 500,000 new abstracts are added from over 5,000 scholarly journals, trade magazines, and conference proceedings. Coverage spans over 175 engineering disciplines from over 80 countries. Updated weekly.
Book Synopsis Government Reports Annual Index by :
Download or read book Government Reports Annual Index written by and published by . This book was released on 1991 with total page 1096 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Particle Sizing in Solid Rocket Motors by : Douglas Lyle Hovland
Download or read book Particle Sizing in Solid Rocket Motors written by Douglas Lyle Hovland and published by . This book was released on 1989 with total page 103 pages. Available in PDF, EPUB and Kindle. Book excerpt: Particle size distribution measurements were made with a Malvern 2600c forward laser light diffraction system across the exhaust nozzle entrance and exhaust plume of a small two-dimensional rocket motor. The solid propellants tested were GAP propellants containing 2.0% and 4.69% aluminum. Surface agglomeration of the aluminum, indicated by the in-motor results, was found to decrease as the motor chamber pressures were increased. At low pressures, increasing the aluminum loading with fixed total solids decreased the mean particle size at the nozzle entrance. Exhaust plume particle size was practically independent of nozzle inlet particle diameters, supporting the critical Weber number particle breakup theory. Initial validation of the Malvern 2600c measurements was accomplished by favorable comparison to exhaust plume particle distribution results obtained using a particle collection probe. Particle sizing; Solid propellant rocket engines; Light scattering; Theses.
Download or read book Science Abstracts written by and published by . This book was released on 1993 with total page 980 pages. Available in PDF, EPUB and Kindle. Book excerpt:
