Research on High Vacuum Phenomenon Produced by Aquatic Vortex

Abstract:

We designed a kind of swirler to produce strong vortex which was inspired by tornado . Focusing on the velocity and pressure distribution of inlet flow within the swirler, we also conducted a series of numerical simulations on the swirler when we set geometric inlet conditions at the bottom ,middle and top of the swirler. The simulation results showed :1 When the geometric inlet condition was set in the middle of the swirler, it would produce the strongest magnitude of vorticity and the highest vacuum degree in the center of vortex compared with other two places.2When we set the geometric inlet condition at the middle of the swirler, it would create reversed swirl flow. We discovered that such kind of reversed swirl flow would enhance the magnitude of main swirl flow vorticity.

• Periodical: Applied Mechanics and Materials (Volumes 444-445)
• Pages: 561-567
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.444-445.561
• Online since: October 2013
• Authors: Xing Chen Shao, Ge Gao
• Keywords: Numerical Simulation, Swirler, Tornado, Vortex Core

References

[1] Pooyan Hashemi Tari, Roi Gurka, Horia Hangan. Experimental investigation of tornado-like vortex dynamics with swirl ratio: The mean and turbulent flow fields[J]. Journal of Wind Engineering and Industrial Aerodynamics, 2010：936-944.

DOI: 10.1016/j.jweia.2010.10.001

[2] Diwakar Natarajan, Horia Hangan. Large eddy simulations of translation and surface roughness effects on tornado-like vortices[J]. Journal of Wind Engineering and Industrial Aerodynamics, 2012：577-584.

DOI: 10.1016/j.jweia.2012.05.004

[3] Takeshi Ishihara, Sho Oh, Yoshieru Tokuyama. Numerical study on flow fields of tornado-like vortices using the LES turbulence model[J]. Journal of Wind Engineering and Industrial Aerodynamics. 2011：239-248.

DOI: 10.1016/j.jweia.2011.01.014

[4] C.M. Gao, K.J. Bosschaart, J.C.H. Zeegers, A.T.A.M. De Waele Experiment study on a simple Ranque-Hilsch vortex tube[J] 2005: 173-183.

DOI: 10.1016/j.cryogenics.2004.09.004

[5] Wei zhang. Partha P. Sarkar . Near-ground tornado-like vortex structure resolved by particle image velocimetry[J]. 2012: 479-493.

DOI: 10.1007/s00348-011-1229-5

[6] VINCENT T. WOOD AND RODGER A. BROWN . Simulated Tornadic Vortex Signatures of Tornado-Like Vortices Having One-and-Two-Celled Structures[J]. Journal of Applied Meteorology and Climatology.

DOI: 10.1175/jamc-d-11-0118.1

[7] C.M. Gao, K,J. Bosschaart J.C.H. Zeegers A.T.A.M. de Waele. Experimental study on a simple Ranque-Hilsch vortex tube[J]. 2005: 173-183.

DOI: 10.1016/j.cryogenics.2004.09.004