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Experimental investigation on turbulence intensity reduction in subsonic wind tunnels

Ghorbanian, K ; Sharif University of Technology

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  1. Type of Document: Article
  2. DOI: 10.1016/j.ast.2010.06.009
  3. Abstract:
  4. Experiments are performed to evaluate the impact of trip wires on the turbulence intensity in a few low speed wind tunnels. Trip wires of different sizes are installed at different positions in the contraction section of four different wind tunnels and measurements are made at various free stream velocities. The results indicate that the pressure distributions are altered compared to the clean condition. Trip wires move the adverse pressure gradient toward the inlet of the contraction section. Consequently, the turbulence intensity in the test section of the wind tunnels is reduced and the flow uniformity is improved considerably. Frequency and statistical analysis are performed and the results are in agreement with the experimental finding
  5. Keywords:
  6. Contraction ; Trip wire ; Turbulence reduction ; Wind tunnel ; Adverse pressure gradient ; Different sizes ; Experimental investigations ; Flow uniformity ; Free-stream velocity ; Low-speed wind tunnel ; Statistical analysis ; Subsonic wind tunnels ; Test sections ; Turbulence intensity ; Aerodynamics ; Turbulence ; Wire ; Wind tunnels
  7. Source: Aerospace Science and Technology ; Volume 15, Issue 2 , 2011 , Pages 137-147 ; 12709638 (ISSN)
  8. URL: http://www.sciencedirect.com/science/article/pii/S127096381000088X