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Show Effects of Surface Conduction on Rib Turbulators S. iVddtturtl, K, <'- < hen, P. M* Li&rani il I 5 i-im e:r|Bg, University af Utah & & ^ I i;^invjfYi MaL^incjiYi r LtrtnJihJi ik?i|i±i i Skf* 1hrH.Kj|J-: ftHinill-jl T*-inriiv fluf!] und tturtS fib ul-ttfr fHfthn. Spatial 1y-r\jsolvtid h^al Erai^fer co^irtoicnts ai^ measured on Ehtf surface of fib Eurbulalors placed in a large-scale teat section without rotation. A single pass channd with itsjract ratio of 4 is employed, \vt£h the ribs plated at 45 degim^ ai^ks relative? to the streamwise £lo\v direction. Reynolds numbers based on channd height range from 270 to 90?000. Thermal heat flux, Nusselt number, and temperature distributions along the surface are calculated using the numerical ANSYS code, along wtlh EesE dala from test section surfaces, to determine ihe heat flux and temperaEure distributions throughout the test surface, including the rib structure. The results are compared with similar analyses ofthe resulls one would expect for an ideal situation (where heal flux is constant on lest surfaces)., lo provide an indication of errors in the experimental data due to conduction along the rib surface. Significant differences arise on wnd near the rib walls, where results for the ideal situation show higher Nusselt number than when ANSYS analysis is used to correct the experimental results. 45 |
