Abstract
Measurement of internal flow-field characteristics in gas turbine engines can be quite valuable in assessing engine performance, particularly during development or component improvement testing. Recent diagnostics development efforts at the Arnold Engineering Development Center (AEDC) have included advancements in flow-field probe miniaturization and measurement techniques for embedded applications in gas turbine engine testing. Examples of these development efforts include 1) an embedded probe that can be configured either for imaging (visual, UV, and IR) or as an optical platform (laser transmit/receive), 2) a miniature swirl probe for localized flow angularity determination, and 3) a probe-based optical system that incorporates the laser diode absorption technique for enhanced chemical species and temperature measurements. These probe configurations and other efforts in miniature probe development, including embedded sensor progress and advances in optical techniques that may be applied to internal flow-field measurements in gas turbine engines, are discussed in this paper.
Published Version
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