All Stories

  1. Impedance Eduction in Large Ducts Containing High-Order Modes and Grazing Flow

    Article • June 2017, American Institute of Aeronautics and Astronautics (AIAA)

    Senior Research Scientist Willie R Watson

  2. Variable-Depth Liner Evaluation Using Two NASA Flow Ducts

    Article • June 2017, American Institute of Aeronautics and Astronautics (AIAA)

    Senior Research Scientist Willie R Watson

  3. Evaluation of Spanwise Variable Impedance Liners with Three-Dimensional Aeroacoustics Propagation Codes

    Article • June 2017, American Institute of Aeronautics and Astronautics (AIAA)

    Senior Research Scientist Willie R Watson

  4. Optimization of Variable-Depth Liner Configurations for Increased Broadband Noise Reduction

    Article • May 2016, American Institute of Aeronautics and Astronautics (AIAA)

    Senior Research Scientist Willie R Watson

  5. Effects of Liner Length and Attenuation on NASA Langley Impedance Eduction

    Article • May 2016, American Institute of Aeronautics and Astronautics (AIAA)

    Senior Research Scientist Willie R Watson

  6. Three-Dimensional Numerical Theory for Impedance Eduction in Normal Incidence Tubes

    Article • May 2016, American Institute of Aeronautics and Astronautics (AIAA)

    Senior Research Scientist Willie R Watson

  7. Impedance Eduction in Sound Fields with Peripherally Varying Liners and Flow

    Article • June 2015, American Institute of Aeronautics and Astronautics (AIAA)

    Senior Research Scientist Willie R Watson

  8. Evaluation of Variable-Depth Liner Configurations for Increased Broadband Noise Reduction

    Article • June 2015, American Institute of Aeronautics and Astronautics (AIAA)

    Senior Research Scientist Willie R Watson

  9. Optimization of Microphone Locations for Acoustic Liner Impedance Eduction

    Article • June 2015, American Institute of Aeronautics and Astronautics (AIAA)

    Senior Research Scientist Willie R Watson

  10. Effects of Mean Flow Assumption and Harmonic Distortion on Impedance Eduction Methods

    Article • AIAA Journal, June 2015, American Institute of Aeronautics and Astronautics (AIAA)

    Senior Research Scientist Willie R Watson

  11. Performance of Kumaresan and Tufts Algorithm in Liner Impedance Eduction with Flow

    Article • AIAA Journal, April 2015, American Institute of Aeronautics and Astronautics (AIAA)

    Senior Research Scientist Willie R Watson

  12. Single Mode Theory for Impedance Eduction in Large-Scale Ducts with Grazing Flow

    Article • June 2014, American Institute of Aeronautics and Astronautics (AIAA)

    Senior Research Scientist Willie R Watson

  13. Evaluation of a Variable-Impedance Ceramic Matrix Composite Acoustic Liner

    Article • June 2014, American Institute of Aeronautics and Astronautics (AIAA)

    Senior Research Scientist Willie R Watson