TURBULENCE CHARACTERISTICS OF THE NOISE PRODUCING REGION OF AN EXCITED ROUND JET. PART 1. TIME-AVERAGE FLOW PROPERTIES.

Constantine Baltas, Philip John Morris

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1 Citation (Scopus)

Abstract

Experiments were conducted to determine the mean turbulence characteristics of the noise-producing region of a 3 in. cold excited round jet. The jet was excited by plane acoustic waves with a high amplitude of excitation (2% of the jet dynamic head), and at a Strouhal number of 0. 5. The flow Reynolds number was 2. 8 multiplied by 10**5. The exit boundary layer was made turbulent by artificially tripping it with sandpaper strips. The data were obtained with single and X-hot-wires and processed in digital form. Mean and higher order statistics were also deduced. The results showed an increase in all three velocity components and stresses. However, most of the increase was noticed from the longitudinal component, while the changes in the radial velocity and the azimuthal component were much smaller.

Original languageEnglish (US)
JournalAIAA Paper
StatePublished - 1984

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Turbulence
Higher order statistics
Strouhal number
Boundary layers
Reynolds number
Acoustic waves
Wire
Experiments

All Science Journal Classification (ASJC) codes

  • Engineering(all)

Cite this

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title = "TURBULENCE CHARACTERISTICS OF THE NOISE PRODUCING REGION OF AN EXCITED ROUND JET. PART 1. TIME-AVERAGE FLOW PROPERTIES.",
abstract = "Experiments were conducted to determine the mean turbulence characteristics of the noise-producing region of a 3 in. cold excited round jet. The jet was excited by plane acoustic waves with a high amplitude of excitation (2{\%} of the jet dynamic head), and at a Strouhal number of 0. 5. The flow Reynolds number was 2. 8 multiplied by 10**5. The exit boundary layer was made turbulent by artificially tripping it with sandpaper strips. The data were obtained with single and X-hot-wires and processed in digital form. Mean and higher order statistics were also deduced. The results showed an increase in all three velocity components and stresses. However, most of the increase was noticed from the longitudinal component, while the changes in the radial velocity and the azimuthal component were much smaller.",
author = "Constantine Baltas and Morris, {Philip John}",
year = "1984",
language = "English (US)",
journal = "AIAA Paper",
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T1 - TURBULENCE CHARACTERISTICS OF THE NOISE PRODUCING REGION OF AN EXCITED ROUND JET. PART 1. TIME-AVERAGE FLOW PROPERTIES.

AU - Baltas, Constantine

AU - Morris, Philip John

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N2 - Experiments were conducted to determine the mean turbulence characteristics of the noise-producing region of a 3 in. cold excited round jet. The jet was excited by plane acoustic waves with a high amplitude of excitation (2% of the jet dynamic head), and at a Strouhal number of 0. 5. The flow Reynolds number was 2. 8 multiplied by 10**5. The exit boundary layer was made turbulent by artificially tripping it with sandpaper strips. The data were obtained with single and X-hot-wires and processed in digital form. Mean and higher order statistics were also deduced. The results showed an increase in all three velocity components and stresses. However, most of the increase was noticed from the longitudinal component, while the changes in the radial velocity and the azimuthal component were much smaller.

AB - Experiments were conducted to determine the mean turbulence characteristics of the noise-producing region of a 3 in. cold excited round jet. The jet was excited by plane acoustic waves with a high amplitude of excitation (2% of the jet dynamic head), and at a Strouhal number of 0. 5. The flow Reynolds number was 2. 8 multiplied by 10**5. The exit boundary layer was made turbulent by artificially tripping it with sandpaper strips. The data were obtained with single and X-hot-wires and processed in digital form. Mean and higher order statistics were also deduced. The results showed an increase in all three velocity components and stresses. However, most of the increase was noticed from the longitudinal component, while the changes in the radial velocity and the azimuthal component were much smaller.

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