MASS-TRANSFER MEASUREMENT TECHNIQUES OF FILM-COOLING IN GAS-TURBINE BLADES

This paper presents an overview of the analogous mass transfer experimental techniques that are used or developed for the measurement of local and mean heat-mass transfer coefficients and adiabatic wall effectiveness, chiefly for the film-cooled blades of gas turbines. The mass transfer techniques yield comprehensive results that are more difficult to obtain using the conventional heat transfer methods. They also provide results such that the errors associated with direct heat transfer methods are eliminated.