Analysis and Test of Coolant Flow and Heat Transfer of an Advanced Full-Coverage Film-Cooled Laminated Turbine Vane

Abstract

A laminated and diffusion bonded turbine vane was designed and manufactured with stainless steel wafers. By the use of photo chemical etching, it was possible to make many elaborate and fine cooling passages. The description of the cooling passage construction is given in this paper. Coolant flow analysis has been done and corrected with the aid of preliminary coolant flow discharge test data without the mainstream. Cooling effectiveness analysis by cascade test has also been performed. Corrected flow analysis shows good agreement with the cascade test data. The resulting cooling effectiveness distribution shows relatively small deviation from the averaged value and it is located at the high level of 0.7 with a coolant flow rate ratio of 6 percent. The analysis and discussion are also presented in this paper.

Cooling Characteristics of Film-Cooled Turbine Blades

“…In addition, a numerical coolant flow analysis was performed during the design of the cooling air passage structure for the present test blades. The work was based on a similar concept as shown in reference (7). The velocity in each cooling passage was calculated to meet the pre-determined pressure by iteration.…”

The Integrated Gas/Steam Nozzle With Steam Cooling: Part II — Design Considerations

“…Full implementation of these fluid-flow and heattransfer principles in a three-dimensional-analysis context in today's arena of computers and computer-controlled machines, tools and techniques is fast becoming a reality. Three-dimensional single-fluid aerodynamics, both sonic and supersonic, matching vane and blade shapes for minimum profile loss, low-end-wall loss, uniform exit and entrance-flow conditions are all within today's manufacturing capabilities and are starting to be evidenced in the market place for both aircraft and industrial gas turbines (16,22,23). The integrated gas/steam nozzle presented in this paper can likewise be further developed through computer techniques, although binary flow does present formidable differential equation development and computer programing challenges.…”