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Vital Role Of Shock Cell And Mach Disk In Noise Production Of Jet Engines
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Book Synopsis Vital Role of Shock-cell and Mach disk in Noise Production of Jet Engines by : Gibin Raju
Download or read book Vital Role of Shock-cell and Mach disk in Noise Production of Jet Engines written by Gibin Raju and published by GRIN Verlag. This book was released on 2018-07-30 with total page 89 pages. Available in PDF, EPUB and Kindle. Book excerpt: Master's Thesis from the year 2018 in the subject Engineering - Aerospace Technology, grade: 3.64, University of Cincinnati, language: English, abstract: The aim of this thesis is to discuss the vital role of shock-cell and Mach disk in noise production of jet engines. This study focuses on calculation of shock-cell spacing and Mach disk from various configuration of C-D Nozzles using Shadowgraph technique and detailing on how it varies with the test conditions. In the past three decades, the air traffic has nearly increased by about 40% and have always called for alternative propulsion techniques to replace or support the current traditional propulsion methodology in order to travel longer distances in shorter frame of time. In the light of current demand, the thesis draws motivation from increase in noise levels due to technological advancements of meeting higher specific thrust thus, achieving higher efficiency. The thesis emphasizes on the study of shock-cell noise by developing a complete view of the shock-cell structure and associated parameters with an imperfectly expanded supersonic jet on CD Nozzles over range of under-expanded, design and over-expanded operating conditions. In the entire thesis study, the heated jets from the different C-D Nozzle are analyzed for proper visualization for the shock-cell structure. Shadowgraph is used in current study as it offers very high flexibility and acts as an excellent technique for visualizing the shock diamond exhaust structure and turbulent eddies. A systematic analysis has been performed to quantify the shadowgraph data through semantic video analysis and measured the shock-cell spacing over different temperature ratios (TR) and nozzle pressure ratios (NPR). Circular, rectangular and method of characteristics (MOC) convergent-divergent nozzles of 1.5 design Mach number with and without plates were tested to interpret the results. The data recorded during the experiment was processed to obtain an averaged image. Further, the averaged images were utilized to compute the shock-cell spacing of each nozzle. The computed shock-cell spacing is compared over the theoretical shock-cell length using empirical formula to validate the results. A good match has been established between theoretical and experimental results for the tested nozzles expect for over-expanded operating conditions.
Book Synopsis The Generation and Radiation of Supersonic Jet Noise: Append. 2. Shock associated noise data by :
Download or read book The Generation and Radiation of Supersonic Jet Noise: Append. 2. Shock associated noise data written by and published by . This book was released on 1972 with total page 176 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Aeroacoustics of Flight Vehicles by : Harvey H. Hubbard
Download or read book Aeroacoustics of Flight Vehicles written by Harvey H. Hubbard and published by . This book was released on 1991 with total page 620 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Aerospace and Associated Technology by : Anup Ghosh
Download or read book Aerospace and Associated Technology written by Anup Ghosh and published by Taylor & Francis. This book was released on 2022-09-24 with total page 607 pages. Available in PDF, EPUB and Kindle. Book excerpt: The International Conference on Theoretical Applied Computational and Experimental Mechanics is organized every three years by the Department of Aerospace Engineering IIT Kharagpur. The conference is devoted to providing a platform for scientists and engineers to exchange their views on the latest developments in Mechanics since 1998. ICTACEM Conference is aimed at bringing together academics and researchers working in various disciplines of mechanics to exchange views as well as to share knowledge between people from different parts of the globe. The 8th ICTACEM was held from December 20-22, 2021, at the Indian Institute of Technology, Kharagpur.
Book Synopsis Some Open Questions on the Jet Noise Problem by : J. E. Ffowcs Williams
Download or read book Some Open Questions on the Jet Noise Problem written by J. E. Ffowcs Williams and published by . This book was released on 1968 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt: The paper starts with a description of the possible sources of sound that can be met in low Mach number jet flows, and their strength is given in terms of the flow parameters. The arguments are of order of magnitude only and the precise value of the coefficients accompanying these formulae are some of the details which wait to be resolved. The initial section deals with the issue of jet noise at very low speed where nozzle exit turbulence may be a major contributor. Lighthill's theory is then briefly summarized and used to estimate the sound of jets at moderate speeds. The object of this step is to show that very reasonable estimates of the field can be achieved from a very crude description of the turbulent flow without recourse to any of the more involved aspects of the quadrupole theory. Then the question of noise produced by combustion of excess fuel in the exhaust is examined according to Lighthill's theory. It is argued that this is unlikely to be a significant source of noise unless very large proportions of the fuel are burned in the exhaust. The theory is then applied to high Mach number situations where it is argued that the role of both Mach waves and shock waves needs further study. Finally, estimates of the sources to be expected in a moderate speed jet issuring from a multitube suppressor are made and a question is raised regarding the possible significance to the noise from the fully developed jet flow. (Author).
Book Synopsis Experimental Investigation of Noise Reduction in Supersonic Jets Due to Jet Rotation and to Nozzle Geometry Changes by :
Download or read book Experimental Investigation of Noise Reduction in Supersonic Jets Due to Jet Rotation and to Nozzle Geometry Changes written by and published by . This book was released on 1999 with total page 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 1991 with total page 1102 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Noise Generation by Shock-turbulence Interaction by : Massachusetts Institute of Technology. Gas Turbine Laboratory
Download or read book Noise Generation by Shock-turbulence Interaction written by Massachusetts Institute of Technology. Gas Turbine Laboratory and published by . This book was released on 1970 with total page 18 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis 41st AIAA Aerospace Sciences Meeting & Exhibit by :
Download or read book 41st AIAA Aerospace Sciences Meeting & Exhibit written by and published by . This book was released on 2003 with total page 580 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Aircraft Propulsion and Gas Turbine Engines by : Ahmed F. El-Sayed
Download or read book Aircraft Propulsion and Gas Turbine Engines written by Ahmed F. El-Sayed and published by CRC Press. This book was released on 2017-07-06 with total page 1448 pages. Available in PDF, EPUB and Kindle. Book excerpt: Aircraft Propulsion and Gas Turbine Engines, Second Edition builds upon the success of the book’s first edition, with the addition of three major topic areas: Piston Engines with integrated propeller coverage; Pump Technologies; and Rocket Propulsion. The rocket propulsion section extends the text’s coverage so that both Aerospace and Aeronautical topics can be studied and compared. Numerous updates have been made to reflect the latest advances in turbine engines, fuels, and combustion. The text is now divided into three parts, the first two devoted to air breathing engines, and the third covering non-air breathing or rocket engines.
Download or read book The Michigan Technic written by and published by UM Libraries. This book was released on 1952 with total page 700 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Lecture series written by and published by . This book was released on 2003 with total page 442 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Applications of Calorimetry by : Jose Luis Rivera Armenta
Download or read book Applications of Calorimetry written by Jose Luis Rivera Armenta and published by BoD – Books on Demand. This book was released on 2022-06-23 with total page 162 pages. Available in PDF, EPUB and Kindle. Book excerpt: Calorimetry is used to measure the transfer and exchange of heat. It is a technique that has applications in different research and industrial sectors. It can be applied in kinetic studies as well as to measure physical changes of first- and second-order transitions such as glass transition, melting, and crystallization. It can also be used to evaluate thermodynamic parameters. This book reports on calorimetry in three sections: “Applications in General”, “Calorimetry in Materials”, and “Calorimetry in Biotechnology”.
Download or read book Federal Register written by and published by . This book was released on 1991-07 with total page 1526 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book NASA SP. written by and published by . This book was released on 1992 with total page 654 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis International Aerospace Abstracts by :
Download or read book International Aerospace Abstracts written by and published by . This book was released on 1997 with total page 702 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Aeronautical Engineering written by and published by . This book was released on 1986 with total page 540 pages. Available in PDF, EPUB and Kindle. Book excerpt: A selection of annotated references to unclassified reports and journal articles that were introduced into the NASA scientific and technical information system and announced in Scientific and technical aerospace reports (STAR) and International aerospace abstracts (IAA).
