The experimental determination of friction-factors for the flow of air in a narrow channel lined with various honeycomb geometries has been carried out. Test results show that, generally, the friction-factor is nearly constant or slightly decreases as the Reynolds number increases, a characteristic common to turbulent flow in pipes. However, in some test geometries this trend is remarkably different. The friction factor dramatically drops and then rises as the Reynolds number increases. This phenomenon can be characterized as a “friction-factor jump.” Further investigations of the acoustic spectrum and friction-factor measurements for a broad range of Reynolds numbers indicate that the “friction-factor jump” phenomenon is accompanied by an onset of a normal mode resonance excited coherent flow fluctuation structure, which occurs at Reynolds number of the order of 104. The purpose of this paper is not to present the friction-factor data but to explain the friction-factor-jump phenomenon and friction-factor characteristics.
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October 1992
Research Papers
Friction-Factor Characteristics for Narrow Channels With Honeycomb Surfaces
T. W. Ha,
T. W. Ha
Turbomachinary Laboratory, Mechanical Engineering Department, Texas A&M University, College Station, Texas 77843
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G. L. Morrison,
G. L. Morrison
Turbomachinary Laboratory, Mechanical Engineering Department, Texas A&M University, College Station, Texas 77843
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D. W. Childs
D. W. Childs
Turbomachinary Laboratory, Mechanical Engineering Department, Texas A&M University, College Station, Texas 77843
Search for other works by this author on:
T. W. Ha
Turbomachinary Laboratory, Mechanical Engineering Department, Texas A&M University, College Station, Texas 77843
G. L. Morrison
Turbomachinary Laboratory, Mechanical Engineering Department, Texas A&M University, College Station, Texas 77843
D. W. Childs
Turbomachinary Laboratory, Mechanical Engineering Department, Texas A&M University, College Station, Texas 77843
J. Tribol. Oct 1992, 114(4): 714-721 (8 pages)
Published Online: October 1, 1992
Article history
Received:
February 11, 1991
Revised:
July 1, 1991
Online:
June 5, 2008
Citation
Ha, T. W., Morrison, G. L., and Childs, D. W. (October 1, 1992). "Friction-Factor Characteristics for Narrow Channels With Honeycomb Surfaces." ASME. J. Tribol. October 1992; 114(4): 714–721. https://doi.org/10.1115/1.2920940
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