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Title: Performance of some two-dimensional film cooling geometries
Author: Matthews, L.
Awarding Body: University of London
Current Institution: Imperial College London
Date of Award: 1973
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Experimental measurements and matching predictions of the impervious-wall effectiveness and several local quantities in the two-dimensional flow field downstream of some film cooling geometries are presented. The geometries chosen are idealised representations of those found in gas turbine practice. Measurements were made with a highly automated experimental system which was specifically developed. Impervious-wall effectiveness was measured for three values of the secondary (slot) to primary (stream) mass velocity ratio and two values of the slot to stream density ratio. For each of the geometries the relevant geometrical parameters were also considered. Detailed measurements of velocity profiles and the profiles of the fluctuating components of velocity, the local turbulent shear stress and spectra of turbulence were made for selected geometrical parameters. A solution procedure was developed based on an algorithm for the finite-difference solution of time-averaged two-dimensional Navier-Stokes equations. It incorporates a Prandtl-Kolmogorov model of turbulence with the effective viscosity defined by the solution of partial differential equations for the turbulent-kinetic energy and the dissipation of turbulent-kinetic energy. The agreement between computed predictions and experimental measurements was satisfactory.
Supervisor: Not available Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID:  DOI: Not available