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Comparison of Experimental and Model-Derived Flow Field Parameters for the DOE Gulfstream I Aerosol Inlet. by Fred Brechtel, Markus Hermann, and Frank Stratmann

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  1. Comparison of Experimental and Model-Derived Flow Field Parameters for the DOE Gulfstream I Aerosol Inlet by Fred Brechtel,Markus Hermann, and Frank Stratmann Brechtel Mfg. Inc Institute for Tropospheric Research Hayward, CA, USA Leipzig, Germany

  2. 3 4 1 2 Experimental Parameters • aircraft: Gulfstream I, DOE • inlet: two-stage diffuser aerosol inlet with 5° half angle • field experiment: July 9, 2002, Worcester, MA 500-1000 m, 100-115 m/s, 0.3 M, 977 hPa, 297 K • instrumentation: 4x hot wire anemometers (Dantec Dynamics, Model 55P16)

  3. Aerosol Inlet at the Gulfstream I

  4. Model Parameters • goal: - flow field in and around the inlet - do experimental and model-derived flow parameters agree? - does the flow separate? • software: GAMBIT 2.0, FLUENT 6.0 • model: 2d, axisymmetric, 135,000 grid cells • turbulence: k--RNG, enhanced wall treatment • input parameters: 977 hPa, 297 K, 106 m/s, 0.3 M

  5. Contours of Velocity

  6. 3 1 4 2 Velocity Along Axis

  7. 3 1 4 2 Turbulence Intensity Along Axis

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