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Saturday, July 18, 2020 | History

1 edition of Frequency analysis of underwater explosions in gas-water resonator found in the catalog.

Frequency analysis of underwater explosions in gas-water resonator

by Allen D. Keimig

  • 41 Want to read
  • 15 Currently reading

Published by Naval Postgraduate School in Monterey, California .
Written in English

    Subjects:
  • Electronics

  • Edition Notes

    Statement[by] Allen D. Keimig, Jr., and John L. Hofmockel
    ContributionsHofmockel, John L.
    ID Numbers
    Open LibraryOL24975306M

    A system for reducing noise emissions in underwater environments is presented. The system can be extended to applications in any two-fluid environments where one fluid (gas) is contained in an enclosed resonator volume connected to the outside environment at an open end of the resonator body. The resonators act as gas-containing (e.g., air) Helmholtz resonators constructed into solid panels @article{osti_, title = {Analysis of an Underwater Acoustic Source}, author = {Bernard, R S}, abstractNote = {An underwater acoustic source, consisting of an internally driven spherical gas bubble, is analyzed for the cases of piston drive and pneumatic mass injection. The linearized radial motion is found, and the effect of nonlinearity is determined.}, doi = {}, journal = {}, number

    ISBN: OCLC Number: Description: xxiv, pages: Contents: Part 1 Accident survey: Introduction, Wind hurricane and tornado generated missiles, Impact and explosion at sea, Car collisions and explosions, Train collisions and impacts, Aircraft and missile impacts, crashes and explosions, Explosions with and without impact, Nuclear explosions and loss-of gas Therefore, it is of great practical significance to study the explosion and propagation characteristics of low-concen-tration gas in pipeline. The main parameters to measure the characteristics of a gas explosion are flame propagation velocity, flame tempera-ture, explosion pressure, and a rising rate of explosion ://

      An acoustic backscatter technique was used to estimate in vivo whole-lung resonant frequencies in a bottlenose dolphin (Tursiops truncatus) and white whale (Delphinapterus leucas).Subjects were trained to submerge and position themselves near an underwater sound projector and a receiving hydrophone. Acoustic pressure measurements were made near the thorax while the   High-speed power sources, however, such as steam or gas turbines, usually require reduction gears to the propeller. The frequency of the explosions in the cylinders of a reciprocating engine is not likely to be a source of ultrasonic (above 15 kHz) noise but might be an important source of low-frequency sonic ://


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Frequency analysis of underwater explosions in gas-water resonator by Allen D. Keimig Download PDF EPUB FB2

frequency analysis of underwater explosions in a gas - water resonator by allen d. keimig, jr. lieutenant 1 united states navy and john l. hofmockel classified by subject to general de­ classification schedule of executive order automatically downgraded at two year intervals declassified on dec~m __ 1_~7~.

UNCLASSIFIED LISTOFILLUSTRATIONS Page SpectrumasaFunctionofVaryingExcess 7 Hydrogen,Depth50feet. SpectrumasaFunctionofVaryingExcess 8 Hydrogen,Depthfeet.

3 The thesis presents the results of an experimental investigation of the frequency spectrum of the acoustic output from underwater explosions in a gas-water resonator. Measured amounts of hydrogen, oxygen, and nitrogen were used as an explosive charge in cylindrical Frequency analysis of underwater explosions in gas-water resonator.

By Jr. Allen D. Keimig and John L. Hofmockel. Download PDF (6 MB) Abstract. Approved for public release; distribution is unlimitedThis thesis presents the results of an experimental investigation of the frequency spectrum of the acoustic output from underwater explosions in a   T. Qu, M. Zhou, in Dynamic Response and Failure of Composite Materials and Structures, Experimental investigation.

R.H. Cole, in his book Underwater Explosions [35], gives a detailed account of the shock waves generated during an explosions and the effect of these waves on ive materials are inherently unstable compounds, which undergo chemical reactions The report concerns the use of hydrogen-oxygen explosions in semi- enclosed chambers as an underwater acoustic signal source.

The basic intent of the thesis was an investigation of the amount of acoustic energy available from such a controlled explosion and its dependence on various mixtures of gas, including excess amounts of hydrogen, oxygen and :// Frequency Analysis Frequency analysis may be thought of as a process by which a time varying signal in the time domain is transformed to its frequency components in the frequency domain.

It can be used for quantification of a noise problem, as both criteria and proposed controls are frequency The underwater explosion (UWE) resulting in the sinking of the South Korean warship, ROKS Cheonan occurred on March 26 Raw data was analyzed from   and gas transport systems.

This course is inspired by the book of Dowling and Ffowcs Williams: “Sound and Sources of Sound” [52]. We also used the lecture notes of the course on aero- and hydroacoustics given by Crighton, Dowling, Ffowcs Williams, Heckl and Leppington [42].~sjoerdr/papers/ Abstract.

This chapter introduces the hydraulic and thermal analysis for oil, oil-gas, gas, and water pipelines.

The hydraulic and thermal analysis of oil transportation pipelines includes steady state temperature and pressure drop along the pipeline, temperature and pressure drop after the pipeline shuts down, and the water hammer :// A high-frequency part of the acoustic spectrum excited by an underwater explosion with cylindrical symmetry is investigated theoretically.

It is assumed that the liquid is inviscid, the surface tension is negligible, and the model for the explosive source is infinite in :// /High-Frequency-Acoustic-Emission-Generated-by.

OF UNDERWATER EXPLOSIONS OF GASEOUS HYDROGEN AND OXYGEN IN A GAS-WATER RESONATOR James F. Miles, et al Naval Postgraduate School Monterey, California DISTRIBUTED BY: Nantimia ThnclI'it• ermakmSev U. DEPARTMENT OF COMMERCE Port Royal Road, Spdngfield Va.

iI ____ __ _ ____ _ i   (Errata for this book is also available) Katsnelson, B.G., V.G. Petnikov and J.F. Lynch, Fundamentals of Shallow Water Acoustics, Springer (). The study of how low and medium frequency sound propagates and scatters on the continental shelves of Arons A.B.

(), Secondary pressure pulses due to gas globe oscillation in underwater explosions: II. Selection of adiabatic parameters in the theory of oscillation.

Request PDF | Comment on Underwater Explosion (UWE) analysis of the ROKS cheonan incident by S. Kim and Y. Kitterman | The analysis of the seismic and infrasound data recorded at the time of Part 5 Explosion Dynamics: Introduction, Fundamental analyses related to an explosion, Explosions in air, Shock reflection, Gas explosions, Dust explosions, Explosions in soils, Rock blasting - construction and demolition, Explosions in water Part 6   where EI is the environmental impact type (i.e.

soil contamination), n tot is the total number of accidents that led to environmental consequences (i.e.

soil contamination), l tot is the overall length of the pipeline network, and i is the year. The failure and environmental impact rate is calculated for each year between and based on the total length of all regulated :// TECHNICAL NEWSLETTERS FABIG releases at least 3 Technical Newsletters per year comprising technical articles on the latest developments in fire and explosion :// G.C.

Gaunaurd, H.C. Strifors: Time-frequency processing of underwater echoes generated by explosive sources. Ultrason2, – () CrossRef Google Scholar   1 EXPLOSIONS AND BLAST PHENOMENON An explosion is defined as a large-scale, rapid and sudden release of energy.

Explosions can be catego-rized on the basis of their nature as physical, nuclear or chemical events. In physical explosions, energy may be released from the catastrophic failure of a cylinder of compressed gas, volcanic eruptions.

Great book on the subject by the pioneers of the field. W. J. Richardson, C. R. Greene, C. I. Malme and D. H. Thompson, Marine Mammals and Noise, Academic (). Pioneering text documenting all aspects of the influence of underwater sound on marine mammals. D. Ross, Mechanics of underwater noise()A new room temperature supra-molecular cryptophane A (CrypA)-coated surface acoustic wave (SAW) sensor for sensing methane gas is presented.

The sensor is composed of differential resonator-oscillators, a supra-molecular CrypA coated along the acoustic propagation path, and a frequency signal acquisition module (FSAM).

A two-port SAW resonator configuration with low insertion loss, single The high-frequency asymptotics of the acoustic noise spectrum is considered for the case of spherically symmetric waves propagating in an unbounded inviscid liquid.

Using the Kirkwood and Bethe hypothesis regarding kinetic enthalpy, the Euler equations, the equation of state in the Tait’s form and following linearization allow the kinetic /Spectrum-of-High-Frequency-Acoustic-Noise-in.