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Effect of location in an array on heat transfer to a cylinder in crossflowAn experiment was conducted to measure the heat transfer from a heated cylinder in crossflow in an array of circular cylinders. All cylinders had a length-to-diameter ratio of 3.0. Both in-line and staggered array patterns were studied. The cylinders were spaced 2.67 diameters apart center-to-center in both the axial and transverse directions to the flow. The row containing the heated cylinder remained in a fixed position in the channel and the relative location of this row within the array was changed by adding up to five upstream rows. The working fluid was nitrogen gas at pressures from 100 to 600 kPa. The Reynolds number ranged based on cylinder diameter and average unobstructed channel velocity was from 5,000 to 125,000. Turbulence intensity: profiles were measured for each case at a point one half space upstream of the row containing the heated cylinder. The basis of comparison for all the heat transfer data was the single row with the heated cylinder. For the in-line cases the addition of a single row of cylinders upstream of the row containing the heated cylinder increased the heat transfer by an average of 50 percent above the base case. Adding up to five more rows caused no increase or decrease in heat transfer. Adding rows in the staggered array cases resulted in average increases in heat transfer of 21, 64, 58, 46, and 46 percent for one to five upstream rows, respectively.
Document ID
19820011619
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Simoneau, R. J. (NASA Lewis Research Center Cleveland, OH, United States)
Vanfossen, G. J., Jr. (NASA Lewis Research Center Cleveland, OH, United States)
Date Acquired
September 4, 2013
Publication Date
January 1, 1982
Subject Category
Fluid Mechanics And Heat Transfer
Report/Patent Number
E-1131
NASA-TM-82797
Meeting Information
Meeting: Joint Thermophy. Fluids, Plasma and Heat Transfer Conf.,
Location: St. Louis, MO
Country: United States
Start Date: June 7, 1982
End Date: June 11, 1982
Accession Number
82N19493
Funding Number(s)
PROJECT: RTOP 505-32-2B
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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