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Automatic Measurement Of Particles From Holograms Taken In The Combustion Chamber Of A Rocket Motor
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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 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 1989 with total page 816 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.
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.
Download or read book Practical Holography written by and published by . This book was released on 1992 with total page 332 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Technical Reports Awareness Circular : TRAC. by :
Download or read book Technical Reports Awareness Circular : TRAC. written by and published by . This book was released on 1989-03 with total page 626 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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 Government reports annual index by :
Download or read book Government reports annual index written by and published by . This book was released on 199? with total page 1668 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Code Optimization of Speckle Reduction Algorithms for Image Processing of Rocket Motor Holograms by : Dana S. Kaeser
Download or read book Code Optimization of Speckle Reduction Algorithms for Image Processing of Rocket Motor Holograms written by Dana S. Kaeser and published by . This book was released on 1988 with total page 88 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis supplements and updates previous research completed in the digital analysis of rocket motor combustion chamber holographic images. In particular this thesis deals with the software code optimization of existing automatic data retrieval algorithms that are used to extract useful particle information from the holograms using a micro-computer based imaging system. Two forms of optimization were accomplished, the application of an optimizing FORTRAN compiler to the existing FORTRAN programs and the complete rewrite of the programs in the C language using an optimizing compiler. The overall results achieved were a reduction in executable program size and a significant decrease in program execution speed. Keywords: Virtual disk based array; Speckle reduction algorithms; Code optimization; Holographic image processing. (jhd).
Download or read book JANNAF Combustion Meeting written by and published by . This book was released on 1988-10 with total page 488 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :North Atlantic Treaty Organization. Advisory Group for Aerospace Research and Development Publisher : ISBN 13 : Total Pages :410 pages Book Rating :4.3/5 (243 download)
Book Synopsis AGARD Index of Publications by : North Atlantic Treaty Organization. Advisory Group for Aerospace Research and Development
Download or read book AGARD Index of Publications written by North Atlantic Treaty Organization. Advisory Group for Aerospace Research and Development and published by . This book was released on 1986 with total page 410 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:
Book Synopsis Government Reports Announcements & Index by :
Download or read book Government Reports Announcements & Index written by and published by . This book was released on 1989-06 with total page 624 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:
Book Synopsis Current Awareness in Particle Technology by :
Download or read book Current Awareness in Particle Technology written by and published by . This book was released on 1992 with total page 448 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Computer-Controlled Image Anaysis of Solid Propellant Combustion Holograms Using a Quantimet 720 and a PDP-11 by : Marvin P. Shook
Download or read book Computer-Controlled Image Anaysis of Solid Propellant Combustion Holograms Using a Quantimet 720 and a PDP-11 written by Marvin P. Shook and published by . This book was released on 1985 with total page 149 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis describes the implementation of a computer-controlled image analyzer to obtain particle size information from holograms of rocket engine combustion products. The two machines utilized were a Quantimet 720 Image Analyser and a DEC PDP-11 digital computer. The machines are described in terms or their hardware, software, and interface. Preliminary results have been included and indicate that the present system is incapable of obtaining the desired particle information from a hologram. The causes for this, as well as their resolution are discussed. (Author).
Book Synopsis Combustion Measurements by : Norman Chigier
Download or read book Combustion Measurements written by Norman Chigier and published by CRC Press. This book was released on 1991-04-01 with total page 556 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book begins with an introduction to the general problems of making measurements in high temperature and a presentation of chemically reacting flow systems. It describes each instrument with the various diagnostic techniques and discusses measurements that have been made in furnaces, flames, and rocket engines. The detailed measurement techniques described in this book cover a wide spectrum of applications in combustion systems, including gas turbine, rocket measurement techniques that were developed in laboratories. Information obtained on detailed temperature, velocity, particle size, and gas concentration distribution is leading to improve understanding of the chemical combustion process and to design imporvements in combustors.
