Effects of aspect ratio on laboratory simulation of tornado-like vortices

Zhuo Tang, Delong Zuo, Darryl James, Yuzuru Eguchi, Yasuo Hattori

Research output: Contribution to journalArticlepeer-review

6 Scopus citations

Abstract

Experiments were conducted in a large-scale Ward-type tornado simulator to study tornado-like vortices. Both flow velocities and the pressures at the surface beneath the vortices were measured. An interpretation of these measurements enabled an assessment of the mean flow field as well as the mean and fluctuating characteristics of the surface pressure deficit, which is a manifestation of the flow fluctuation aloft. An emphasis was placed on the effect of the aspect ratio of the tornado simulator on the characteristics of the simulated flow and the corresponding surface pressure deficit, especially the evolution of these characteristics due to the transition of the flow from a single-celled vortex to a two-celled vortex with increasing swirl ratio.

Original languageEnglish
Pages (from-to)111-121
Number of pages11
JournalWind and Structures, An International Journal
Volume27
Issue number2
DOIs
StatePublished - Aug 2018

Keywords

  • Aspect ratio
  • Surface pressure deficit
  • Swirl ratio
  • Tornado-like vortex

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