Computational/experimental investigation of staged injection into a Mach 2 flow

Journal Article · Sun May 01 04:00:00 EDT 1994 · AIAA Journal (American Institute of Aeronautics and Astronautics); (United States)

DOI:https://doi.org/10.2514/3.12073· OSTI ID:7163947

Eklund, D R; Fletcher, D G; Hartfield, Jr, R J; Mcdaniel, J C; Northam, G B; Dancey, C L; Wang, J A ^[1]

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1. National Academy of Sciences - National Research Council, Hampton, VA (United States)

The staged normal injection of two jets of air into a Mach 2 freestream behind a rearward-facing step has been investigated using laser-induced iodine fluorescence and laser doppler anemometry techniques. A detailed data set has been compiled that includes profiles of pressure, temperature, two components of velocity, and mole fraction of the injectant at 44 locations, plus planar surveys of pressure, temperature, velocity, and mole fraction. A companion numerical study was performed using the SPARK Navier-Stokes code. Good overall agreement was observed for this complex, highly three-dimensional flowfield. Discrepancies were observed in the computed and measured total temperatures, turbulent mixing, and shock strengths. The effect of grid resolution was investigated by calculating solutions on grids of 60,000 points, 200,000 points, and 450,000 points. Differences in the solutions on the two finer grids were small. The effect of turbulence modeling was investigated by calculating solutions with three different algebraic models for the jet turbulence. Overall, the turbulence models were found to have the greatest effect on the numerical solutions, followed by the grid resolution and the injectant Mach number. 21 refs.

• OSTI ID: 7163947
• Journal Information: AIAA Journal (American Institute of Aeronautics and Astronautics); (United States), Journal Name: AIAA Journal (American Institute of Aeronautics and Astronautics); (United States) Vol. 32:5; ISSN AIAJAH; ISSN 0001-1452
• Country of Publication: United States
• Language: English

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