Velocity measurements in jets with application to noise source modeling

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

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

7 Citations (Scopus)

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 - Dec 1 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

Fingerprint

velocity measurement
Velocity measurement
anemometers
anemometer
Anemometers
modeling
flow measurement
Flow measurement
charge flow devices
cross correlation
Computational fluid dynamics
Turbulence
convection
turbulence
prediction
predictions

All Science Journal Classification (ASJC) codes

  • Space and Planetary Science
  • Aerospace Engineering

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).
Morris, Philip John ; Zaman, Khairul B.M.Q. / Velocity measurements in jets with application to noise source modeling. 47th AIAA Aerospace Sciences Meeting including the New Horizons Forum and Aerospace Exposition. 2009. (47th AIAA Aerospace Sciences Meeting including the New Horizons Forum and Aerospace Exposition).
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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.",
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Morris, PJ & Zaman, KBMQ 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, 47th AIAA Aerospace Sciences Meeting including the New Horizons Forum and Aerospace Exposition, Orlando, FL, United States, 1/5/09.

Velocity measurements in jets with application to noise source modeling. / Morris, Philip John; Zaman, Khairul B.M.Q.

47th AIAA Aerospace Sciences Meeting including the New Horizons Forum and Aerospace Exposition. 2009. 2009-0017 (47th AIAA Aerospace Sciences Meeting including the New Horizons Forum and Aerospace Exposition).

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

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Morris PJ, Zaman KBMQ. 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. 2009-0017. (47th AIAA Aerospace Sciences Meeting including the New Horizons Forum and Aerospace Exposition).