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Prediction of Turbulent Temperature Fluctuations in Hot Jets
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Author and Affiliation:
Debonis, James R.(NASA Glenn Research Center, Cleveland, OH United States)
Abstract: Large-eddy simulations were used to investigate turbulent temperature fluctuations and turbulent heat flux in hot jets. A high-resolution finite-difference Navier-Stokes solver, WRLES, was used to compute the flow from a 2-inch round nozzle. Several different flow conditions, consisting of different jet Mach numbers and temperature ratios, were examined. Predictions of mean and fluctuating velocities were compared to previously obtained particle image velocimetry data. Predictions of mean and fluctuating temperature were compared to new data obtained using Raman spectroscopy. Based on the good agreement with experimental data for the individual quantities, the combined quantity turbulent heat flux was examined.
Publication Date: Jul 01, 2017
Document ID:
20170007295
(Acquired Aug 08, 2017)
Subject Category: FLUID MECHANICS AND THERMODYNAMICS
Report/Patent Number: NASA/TM-2017-219531, E-19388, AIAA Paper 2017-3610, GRC-E-DAA-TN44180
Document Type: Technical Report
Contract/Grant/Task Num: WBS 109492.02.03.01.01.01
Financial Sponsor: NASA Glenn Research Center; Cleveland, OH United States
Organization Source: NASA Glenn Research Center; Cleveland, OH United States
Description: 32p; In English
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: No Copyright; Work of the U.S. Government - Public use permitted
NASA Terms: LARGE EDDY SIMULATION; TURBULENT HEAT TRANSFER; RAMAN SPECTROSCOPY; FINITE DIFFERENCE THEORY; JET FLOW; TURBULENT FLOW; TEMPERATURE RATIO; VARIATIONS; HIGH RESOLUTION; MACH NUMBER
Other Descriptors: HOT JETS; LARGE-EDDY SIMULATIONS; TURBULENT HEAT FLUX
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