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Experimental observations on transition to turbulence in confined coaxial jets and other boundary layer flows

Publication ,  Journal Article
Gore, RA; Crowe, CT; Bejan, A
Published in: American Society of Mechanical Engineers, Fluids Engineering Division (Publication) FED
December 1, 1990

Experiments performed demonstrate the transition to turbulent flow of water jets discharging coaxially into a stream confined in a round duct. The critical Reynolds number is shown to be a strong function of velocity ratio. From the flow visualization it is shown that a proportionality between the laminar length of the jet (L) and the wavelength (λ) can be seen in the region of transition to turbulence. The proportionality coincides with similar observations concerning the transition to turbulence in various other flows. A brief arguments based on scale analysis is presented for the confined coaxial jet and round plume. The apparent universality of the L/λ approximately 0(10) scaling law supports the conclusion that the laminar sections of all naturally progressing boundary layer-type flows are geometrically similar.

Duke Scholars

Published In

American Society of Mechanical Engineers, Fluids Engineering Division (Publication) FED

Publication Date

December 1, 1990

Volume

94

Start / End Page

79 / 83

Related Subject Headings

  • Mechanical Engineering & Transports
 

Citation

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Gore, R. A., Crowe, C. T., & Bejan, A. (1990). Experimental observations on transition to turbulence in confined coaxial jets and other boundary layer flows. American Society of Mechanical Engineers, Fluids Engineering Division (Publication) FED, 94, 79–83.
Gore, R. A., C. T. Crowe, and A. Bejan. “Experimental observations on transition to turbulence in confined coaxial jets and other boundary layer flows.” American Society of Mechanical Engineers, Fluids Engineering Division (Publication) FED 94 (December 1, 1990): 79–83.
Gore RA, Crowe CT, Bejan A. Experimental observations on transition to turbulence in confined coaxial jets and other boundary layer flows. American Society of Mechanical Engineers, Fluids Engineering Division (Publication) FED. 1990 Dec 1;94:79–83.
Gore, R. A., et al. “Experimental observations on transition to turbulence in confined coaxial jets and other boundary layer flows.” American Society of Mechanical Engineers, Fluids Engineering Division (Publication) FED, vol. 94, Dec. 1990, pp. 79–83.
Gore RA, Crowe CT, Bejan A. Experimental observations on transition to turbulence in confined coaxial jets and other boundary layer flows. American Society of Mechanical Engineers, Fluids Engineering Division (Publication) FED. 1990 Dec 1;94:79–83.

Published In

American Society of Mechanical Engineers, Fluids Engineering Division (Publication) FED

Publication Date

December 1, 1990

Volume

94

Start / End Page

79 / 83

Related Subject Headings

  • Mechanical Engineering & Transports