Abstract
An aerodynamic performance test for gas turbine nozzle vanes has been conducted under aerodynamic design conditions. The effect of endwall cooling on the performance has been surveyed by measuring detailed pressure distributions at a certain exit flow section of a nozzle vanes' annular cascade with the use of a Pitot-tube. Image display of a series of pressure fields clearly reveals variations of patterns due to differences in an injection angle and amount of injected coolant. Among various kinds of two-and three-dimensional display modes, two dimensional step color mode has the most powerful ability for analysis and presentaion of data, although it considerably loses its virtue when published in black/white print. Image display, as a means of expressing a large quantity of data, is getting indispensable under recent advancements in wide varieties of computer systems, irrespective of experimental-and numerical-work.
