Velocity measurements in jets with application to noise source modeling

Philip J. Morris, Khairul B.M.Q. Zaman

Research output: Chapter in Book/Report/Conference proceedingConference contribution

7 Scopus citations

Abstract

This paper describes an experimental investigation of the statistical properties of turbulent velocity fluctuations in an axisymmetric jet. The focus is on those properties that are relevant to the prediction of noise. Measurements are performed using two single hotwire anemometers as well as a two-component anemometer. Two-point cross correlations of the axial velocity fluctuations and the fluctuation in the square of the axial velocity fluctuations are presented. Several reference locations in the jet are used including points on the jet lip and centerlines. The scales of the turbulence and the convection velocity are determined, both in an overall sense as well as a function of frequency. The relationship between the second and fourth order correlations is developed and compared with the experimental data. The implications of the use of dimensional as well as non-dimensional correlations are considered. Finally, a comparison is made between the length scales deduced from the flow measurements and a RANS CFD calculation.

Original languageEnglish (US)
Title of host publication47th AIAA Aerospace Sciences Meeting including the New Horizons Forum and Aerospace Exposition
StatePublished - 2009
Event47th AIAA Aerospace Sciences Meeting including the New Horizons Forum and Aerospace Exposition - Orlando, FL, United States
Duration: Jan 5 2009Jan 8 2009

Publication series

Name47th AIAA Aerospace Sciences Meeting including the New Horizons Forum and Aerospace Exposition

Other

Other47th AIAA Aerospace Sciences Meeting including the New Horizons Forum and Aerospace Exposition
CountryUnited States
CityOrlando, FL
Period1/5/091/8/09

All Science Journal Classification (ASJC) codes

  • Space and Planetary Science
  • Aerospace Engineering

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  • Cite this

    Morris, P. J., & Zaman, K. B. M. Q. (2009). Velocity measurements in jets with application to noise source modeling. In 47th AIAA Aerospace Sciences Meeting including the New Horizons Forum and Aerospace Exposition [2009-0017] (47th AIAA Aerospace Sciences Meeting including the New Horizons Forum and Aerospace Exposition).