An accurate design of a guide vane has become a major issue in gas turbine engineering since secondary flow in vane cascade has a significant effect on the end wall and airfoil suction surfaces. Heat transfer and average flow measurements were performed in a linear guide vane cascade consisting of five gas turbine vanes. All measurements were taken on the suction surface of the middle (third) airfoil. The height-to-pitch ratio H/S was varied from 1.0 to 0.17, the inlet boundary layer thickness δin was either 2 mm or 10 mm. The vortex structures influence the average flow parameters, the laminar-to-turbulence transition, and the local heat transfer. This is especially pronounced in the area close to the end wall area. The inlet flow temperature non-uniformity has no influence on the heat transfer, however local flow temperature ‘spikes’ were registered at x = 0.6 due to the flow enthalpy migration in the span-wise direction. A few useful correlations are suggested as a result of the experimental data processing.
Effect of Secondary Flow on Heat Transfer Over a Guide Vane Suction Side
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Khalatov, A, Syred, N, Khalatov, S, & Bowen, P. "Effect of Secondary Flow on Heat Transfer Over a Guide Vane Suction Side." Proceedings of the ASME Turbo Expo 2002: Power for Land, Sea, and Air. Volume 3: Turbo Expo 2002, Parts A and B. Amsterdam, The Netherlands. June 3–6, 2002. pp. 341-347. ASME. https://doi.org/10.1115/GT2002-30197
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