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| Content Provider | The American Society of Mechanical Engineers (ASME) Digital Collection |
|---|---|
| Author | Devoe, Jason Odom, Stephen Ginzbursky, Lev |
| Copyright Year | 2012 |
| Abstract | This paper investigates the accuracy of Uniform Crystal Temperature Sensors (UCTS) under transient conditions and describes a methodology for addressing sources of systematic error based on the findings. The study applies to the important task of thermal mapping of critical turbine parts during the engine development phase, for which UCTS is particularly well suited [1, 2, 3, 4]. A previous study focused on UCTS in steady state regimes and provided recommendations for optimizing the technique [5]. However, a substantial reduction in engine development costs may be achieved by being able to combine, for instance cyclic endurance tests with thermal mapping assuming that neither task will jeopardize the other. The basic trends and magnitude of measurement errors were assessed as a function of factors such as UCTS installation configuration, thermo-physical properties of the installation materials and cycle characteristics. The authors used Finite Element Analysis to simulate transient heat transfer through a thin wall with an embedded UCTS. Stress calculations performed for the case of densely packed multi-UCTS installation on turbine blades showed no detrimental influence of standard micro-cavities on blade structural characteristics. These results were confirmed by a number of successful endurance tests, proving its compatibility with the task of thermography. Attention was focused on the cyclic test influence on the accuracy of thermal mapping. Single and multiple cycle test configurations have been considered. After completion of a computational matrix, the characteristic results of interest are presented in the form of plots and diagrams to support the technical discussion. Recommendations drawn from this research will help analytical designers, test and instrumentation engineers to plan and execute dual task transient tests with a high accuracy of thermal mapping result interpretation. |
| Sponsorship | International Gas Turbine Institute |
| Starting Page | 79 |
| Ending Page | 87 |
| Page Count | 9 |
| File Format | |
| ISBN | 9780791844700 |
| DOI | 10.1115/GT2012-68197 |
| Volume Number | Volume 4: Heat Transfer, Parts A and B |
| Conference Proceedings | ASME Turbo Expo 2012: Turbine Technical Conference and Exposition |
| Language | English |
| Publisher Date | 2012-06-11 |
| Publisher Place | Copenhagen, Denmark |
| Access Restriction | Subscribed |
| Subject Keyword | Cycles Turbine blades Blades Crystals Instrumentation Transient heat transfer Steady state Engines Stress Transients (dynamics) Thin wall structures Temperature sensors Errors Cavities Engineers Finite element analysis Turbine components Thermography |
| Content Type | Text |
| Resource Type | Article |
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