相関法を用いた画像処理流速計による回転キャビティ内の速度・熱伝達計測

概要

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This study experimentally deals with flow and heat transfer in low-pressure turbine section of modern gas turbine engine. Flow visualization and heat transfer experiments were performed in both stationary and rotating conditions. Two-dimensional flow velocity field was measured using Particle Image Velocimetry (PIV). Two kinds of Reynolds number were employed as dimensionless parameters: the through-flow Reynolds number, Re_γ, and the rotational Reynolds number, Re_ω. The flow and heat transfer of disk surfaces in rotating cavities were investigated for combinations of Re_ω=0, 3.0×10^4 and Re_γ=450, 1800. The results clearly showed that the monotonic decrease tendency and the formation of the local minimum in the local Nusselt number distribution corresponded to the radially outward flow near the disk surface and the suction flow induced by a pair of vortex in the cavity, respectively.
社団法人日本ガスタービン学会の論文
2005-01-20