Experimental study of Richtmyer-Meshkov instabilityin a heavy gas cylinder interacting with reflected shock wave

Liao Shenfei; Zou Liyong; Liu Jinhong; Bai Jinsong; Wang Yanping

doi:10.11883/1001-1455(2016)01-0087-06

Volume 36 Issue 1

Oct. 2018

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Liao Shenfei, Zou Liyong, Liu Jinhong, Bai Jinsong, Wang Yanping. Experimental study of Richtmyer-Meshkov instabilityin a heavy gas cylinder interacting with reflected shock wave[J]. Explosion And Shock Waves, 2016, 36(1): 87-92. doi: 10.11883/1001-1455(2016)01-0087-06

Citation:

Liao Shenfei, Zou Liyong, Liu Jinhong, Bai Jinsong, Wang Yanping. Experimental study of Richtmyer-Meshkov instabilityin a heavy gas cylinder interacting with reflected shock wave[J]. Explosion And Shock Waves, 2016, 36(1): 87-92. doi: 10.11883/1001-1455(2016)01-0087-06

Citation:

Liao Shenfei, Zou Liyong, Liu Jinhong, Bai Jinsong, Wang Yanping. Experimental study of Richtmyer-Meshkov instabilityin a heavy gas cylinder interacting with reflected shock wave[J]. Explosion And Shock Waves, 2016, 36(1): 87-92. doi: 10.11883/1001-1455(2016)01-0087-06

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Experimental study of Richtmyer-Meshkov instabilityin a heavy gas cylinder interacting with reflected shock wave

doi: 10.11883/1001-1455(2016)01-0087-06

National Key Laboratory of Shock Wave and Detonation Physics, Institute of Fluid Physics, China Academy of Engineering Physics, Mianyang 621999, Sichuan, China

Received Date: 2014-06-27
Rev Recd Date: 2014-11-25
Publish Date: 2016-01-25

Abstract

Abstract

The Richtmyer-Meshkov (RM) instability in a heavy gas (SF₆) cylinder surrounded by ambient air is experimentally studied using a high-speed video camera in combination with a laser sheet. The evolving gas cylinder at intermediate to later stages was reshocked by the reflected shock wave at different times along with the changes of the endwall distance, which was achieved by designing a movable endwall for the test section in a horizontal shock tube. It is demonstrated that different endwall distances result in different evolutions of the reshocked interface. For a short endwall distance, the effect of the baroclinic mechanism on the interface evolution is significant and a secondary vortex pair is formed, while for a long endwall distance, the effect of the pressure perturbation mechanism is significant and the streamwise compression of the interface instead of vortex structure is clearly observable. In addition, quantitative analysis is conducted by measuring the position and the integral scale of the interface from sequences of images.
- fluid mechanics,
- Richtmyer-Meshkov instability,
- reflected shock wave,
- gas cylinder,
- baroclinic vorticity,
- vortex

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References(19)

References

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