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Detailed Heat/Mass Transfer Distributions in a Rotating Two Pass Coolant Channel With Engine‐Near Cross Section and Smooth Walls
Author(s) -
RATHJEN L.,
HENNECKE D. K.,
BOCK S.,
KLEINSTÜCK R.
Publication year - 2001
Publication title -
annals of the new york academy of sciences
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.712
H-Index - 248
eISSN - 1749-6632
pISSN - 0077-8923
DOI - 10.1111/j.1749-6632.2001.tb05880.x
Subject(s) - nusselt number , mechanics , reynolds number , heat transfer , coolant , mass transfer , pressure drop , sherwood number , materials science , geometry , thermodynamics , physics , turbulence , mathematics
A bstract : This paper shows results obtained by experimental and numerical investigations concerning flow structure and heat/mass transfer in a rotating two‐pass coolant channel with engine‐near geometry. The smooth two passes are connected by a 180° U‐bend in which a 90° turning vane is mounted. The influence of rotation number, Reynolds number and geometry is investigated. The results show a detailed picture of the flow field and distributions of Sherwood number ratios determined experimentally by the use of the naphthalene sublimation technique as well as Nusselt number ratios obtained from the numerical work. Especially the heat/mass transfer distributions in the bend and in the region after the bend show strong gradients, where several separation zones exist and the flow is forced to follow the turbine airfoil shape. Comparisons of numerical and experimental results show only partly good agreement.