High-speed flow visualization of fluid instabilities

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Description

The fluid instability resulting from the impulsive acceleration a thin, heavy gas layer embedded in a lighter gas is characterized through high-speed flow visualization. The shock-accelerated event occurs over the course of 1 ms. A laser sheet illuminates a plane of the gas layer and its evolution is recorded by a camera observing high-angle scattered light. Two sets of diagnostics were evaluated. These derived their time resolution either from gating the camera or pulsing the illumination source. The arbitrary inter-exposure timing associated with the gated camera was found to be significantly advantageous over the fixed intervals of the pulsed laser. ... continued below

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8 p.

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Rightley, P.M. & Benjamin, R.F. December 1, 1996.

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Description

The fluid instability resulting from the impulsive acceleration a thin, heavy gas layer embedded in a lighter gas is characterized through high-speed flow visualization. The shock-accelerated event occurs over the course of 1 ms. A laser sheet illuminates a plane of the gas layer and its evolution is recorded by a camera observing high-angle scattered light. Two sets of diagnostics were evaluated. These derived their time resolution either from gating the camera or pulsing the illumination source. The arbitrary inter-exposure timing associated with the gated camera was found to be significantly advantageous over the fixed intervals of the pulsed laser. The intensified, gated camera also placed more manageable requirements on the light source and provided sufficient data to measure the instability growth rates. However, the pulsed laser arrangement produced superior spatial resolution primarily due to the lack of an intensifier.

Physical Description

8 p.

Notes

OSTI as DE97000932

Source

  • 22. international congress on high speed photography and photonics, Santa Fe, NM (United States), 28 Oct 1996

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  • Other: DE97000932
  • Report No.: LA-UR--96-3507
  • Report No.: CONF-9610181--2
  • Grant Number: W-7405-ENG-36
  • Office of Scientific & Technical Information Report Number: 402361
  • Archival Resource Key: ark:/67531/metadc680554

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Creation Date

  • December 1, 1996

Added to The UNT Digital Library

  • July 25, 2015, 2:20 a.m.

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  • Feb. 29, 2016, 9:21 p.m.

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Rightley, P.M. & Benjamin, R.F. High-speed flow visualization of fluid instabilities, article, December 1, 1996; New Mexico. (digital.library.unt.edu/ark:/67531/metadc680554/: accessed August 21, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.