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PIV and Rotational Raman-Based Temperature Measurements for CFD Validation in a Single Injector Cooling FlowFilm cooling is used in a wide variety of engineering applications for protection of surfaces from hot or combusting gases. The design of more efficient thin film cooling geometries/configurations could be facilitated by an ability to accurately model and predict the effectiveness of current designs using computational fluid dynamics (CFD) code predictions. Hence, a benchmark set of flow field property data were obtained for use in assessing current CFD capabilities and for development of better turbulence models. Both Particle Image Velocimetry (PIV) and spontaneous rotational Raman scattering (SRS) spectroscopy were used to acquire high quality, spatially-resolved measurements of the mean velocity, turbulence intensity and also the mean temperature and normalized root mean square (rms) temperatures in a single injector cooling flow arrangement. In addition to flowfield measurements, thermocouple measurements on the plate surface enabled estimates of the film effectiveness. Raman spectra in air were obtained across a matrix of radial and axial locations downstream from a 68.07 mm square nozzle blowing heated air over a range of temperatures and Mach numbers, across a 30.48 cm long plate equipped with a single injector cooling hole. In addition, both centerline streamwise 2-component PIV and cross-stream 3-component Stereo PIV data at 15 axial stations were collected in the same flows. The velocity and temperature data were then compared against Wind-US CFD code predictions for the same flow conditions. The results of this and planned follow-on studies will support NASA's development and assessment of turbulence models for heated flows.
Document ID
Acquisition Source
Glenn Research Center
Document Type
Technical Memorandum (TM)
Mark P Wernet
(Glenn Research Center Cleveland, Ohio, United States)
Georgiadis, Nicholas J.
(Glenn Research Center Cleveland, Ohio, United States)
Locke, Randy J.
(Vantage Partners, LLC Cleveland, OH, United States)
Date Acquired
February 5, 2018
Publication Date
January 30, 2018
Subject Category
Statistics And Probability
Instrumentation And Photography
Fluid Mechanics And Thermodynamics
Report/Patent Number
Funding Number(s)
WBS: WBS 109492.
Distribution Limits
Public Use Permitted.
Technical Review
Single Expert
Raman Scattering
Particle Image Velocimetry
Film Coolin
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