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Numerical investigation of wall curvature effects on heat transfer and film cooling effectiveness

Shalchi Tabrizi, A ; Sharif University of Technology | 2016

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  1. Type of Document: Article
  2. DOI: 10.1615/HeatTransRes.2016010264
  3. Publisher: Begell House Inc , 2016
  4. Abstract:
  5. In this research, the problems of adiabatic film-cooling the flat, convex, and concave surfaces are investigated numerically. Two different radii of curvature and one row of vertical injection holes are considered. The Navier-Stokes equations are solved using a fine nonuniform multiblock staggered curvilinear grid and the SIMPLE-based finite volume method. The blowing rates are 0.5 and 1.0 and the mainstream Reynolds number is 10,000. The obtained results indicated that at a low blowing ratio, the cooling effectiveness enhances over the convex surface and reduces over the concave surface compared to the flat surface case. In comparison with the low blowing ratio, the curvature effects at a high blowing ratio seem to be less pronounced. At the high blowing ratio, the effectiveness is not greatly influenced by the surface curvature
  6. Keywords:
  7. Convex surface ; Numerical simulation ; Computer simulation ; Cooling ; Finite volume method ; Heat transfer ; Reynolds number ; Concave surface ; Convex surfaces ; Cooling effectiveness ; Flat plate ; Wall curvature ; Navier Stokes equations
  8. Source: Heat Transfer Research ; Volume 47, Issue 6 , 2016 , Pages 559-574 ; 10642285 (ISSN)
  9. URL: http://www.dl.begellhouse.com/journals/46784ef93dddff27,6f121ca8263f1e7d,0834ef740e39ca85.html