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Application of High Speed Digital Image Correlation in Rocket Engine Hot Fire TestingHot fire testing of rocket engine components and rocket engine systems is a critical aspect of the development process to understand performance, reliability and system interactions. Ground testing provides the opportunity for highly instrumented development testing to validate analytical model predictions and determine necessary design changes and process improvements. To properly obtain discrete measurements for model validation, instrumentation must survive in the highly dynamic and extreme temperature application of hot fire testing. Digital Image Correlation has been investigated and being evaluated as a technique to augment traditional instrumentation during component and engine testing providing further data for additional performance improvements and cost savings. The feasibility of digital image correlation techniques were demonstrated in subscale and full scale hotfire testing. This incorporated a pair of high speed cameras to measure three-dimensional, real-time displacements and strains installed and operated under the extreme environments present on the test stand. The development process, setup and calibrations, data collection, hotfire test data collection and post-test analysis and results are presented in this paper.
Document ID
20170002047
Document Type
Presentation
Authors
Gradl, Paul R. (NASA Marshall Space Flight Center Huntsville, AL, United States)
Schmidt, Tim (Trilion Quality Systems West Conshohocken, PA, United States)
Date Acquired
March 8, 2017
Publication Date
November 7, 2016
Subject Category
Instrumentation and Photography
Spacecraft Propulsion and Power
Report/Patent Number
M17-5674
Meeting Information
iDICs 2016 Conference and Workshop(Philadelphia, PA)
Distribution Limits
Public
Copyright
Public Use Permitted.

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