Reduced Instrumentation Heat Transfer Testing of Model Turbine Blade Cooling Systems
Abstract
Turbine cooling system engineers often evaluate designs using experiments that measure heat transfer rates and pressure drop. Engine Reynolds numbers are reproduced in large-scale test sections and the dimensionless heat transfer coefficients then relate directly to engine values. The experimental test strategy allows the designer to quantify the performance of new, more intricate flow schemes. One common method entails the use of a model manufactured from a thermally insulating material that is subjected to a rapid change in inlet gas temperature. This paper is concerned with a method of processing these tests by analyzing only gas temperature changes. The approach offers data at lower resolution compared to conventional methods, but can provide information in situations in which full surface temperature changes cannot be measured. The advantages and disadvantages of the method are discussed and results are compared to the data from a conventional analysis of liquid-crystal-coated models. (10 figures, 17 refs.)
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 01, 2003
- Accession Number
- ADA419405
Entities
People
- C. L. Tsang
- Geoff Dailey
- P. T. Ireland
Organizations
- University of Oxford