Structural Design and Performance Study of a Reciprocating Vortex Ring Generator

Document Type : Regular Article

Authors

College of Energy and Power Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing, 210016, Jiangsu, China

Abstract

Vortex rings can maintain their structure during motion and achieve long-distance transport with low energy consumption, which is a fluid transport method with great energy-saving potential. In this paper, a reciprocating vortex ring generator structure is designed, which can generate two vortex rings during the reciprocating motion of one piston, making full use of the thrust in the reciprocating motion period of the piston and improving the vortex ring generation frequency compared with traditional vortex ring generators. For the characteristics of long-distance transport of vortex rings, an experimental platform is designed and built, and 277 sets of experiments are carried out with different geometric parameters. The results show that the effect of generating two vortex rings could be achieved under other parameter conditions, except for some parameter conditions where the diameter ratio D1/D2 = 4. By analyzing the influence of baffle width ratio, length ratio, and diameter ratio on the moving distance of vortex rings, the performance of the vortex ring generator is preliminarily studied. In 277 sets of experiments, the maximum moving distance ratio x1 of vortex ring 1 is 13.7 when L1/L2 = 2.4, D1/D2 = 2, and w1 = 0.2. And the maximum moving distance ratio x2 of vortex ring 2 is 20 when L1/L2 = 2, D1/D2 = 2.5, and w2 = 0.2. 

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References

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Journal of Applied Fluid Mechanics
Volume 17, Issue 1 - Serial Number 81
January 2024
Pages 148-158

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History

  • Received: 10 May 2023
  • Revised: 28 August 2023
  • Accepted: 03 September 2023
  • Available online: 01 November 2023

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