Adiabatic and overall effectiveness in the showerhead of a film cooled turbine vane and effects of surface curvature on adiabatic effectiveness
MetadataShow full item record
Two sets of experiments were performed on a simulated turbine nozzle guide vane. First, adiabatic and overall effectiveness measurements were taken in the showerhead region of the vane using adiabatic and matched Biot vane models, respectively. Measurements of overall effectiveness in the showerhead region are not found in the literature, and are a useful baseline for validating the results of computational fluid dynamics (CFD) simulations. Overall effectiveness is useful because it shows the results of combining film cooling, internal convection, and surface conduction to provide a more complete picture of vane cooling than adiabatic effectiveness. An impingement plate was utilized to generate internal jet cooling. Momentum flux ratios were matched between the models and ranged from I*SH = 0.76 to 6.70, based on showerhead upstream approach velocity. The second set of experiments used a different model to examine the effects of surface curvature on adiabatic effectiveness. Results in open literature are found by varying the radius of curvature of a fixed setup, so the current approach was novel in that it looked at adiabatic effectiveness at locations of various curvature around the same vane. Blowing ratios from M = 0.4 to M = 1.6 were tested at a density ratio of DR = 1.20 for two locations on the suction side of the vane. Results were presented in terms of laterally averaged adiabatic effectiveness and contour plots of adiabatic effectiveness, and were compared to literature.
Showing items related by title, author, creator and subject.
Polar analyte effects on charge transport and trapping In organic field effect transistor based chemical and vapor sensors Duarte, Davianne A. (2011-05)Organic thin film transistors (TFTs) based on the field effect transistor architecture provide a methodology for sensing by exhibiting a change in the transport properties such as shifts in mobility, threshold voltage and ...
Yi, Kŏn-ho, 1967- (2005-05)Lippmann argued the function of mass media was to bridge the world outside with the pictures in our heads (1922/1965). His idea has been floating the surface of real world and academic journalism throughout much of its ...
The effects of androgens on steroidogenesis in the ovary of Atlantic croaker (Micropogonias undulatus) : mechanism of action, the biochemical characterization of a membrane androgen receptor, and the chronic effects of exposure to an environmental antiandrogen Braun, Alyssa Maria, 1974- (2002-05)This study focuses on the actions of androgens in the gonads of the Atlantic croaker (Micropogonias undulatus). Physiologically relevant concentrations of androgens are shown to inhibit in vitro ovarian production of ...