"This thesis is experimental investigation into the possibility of obtaining an increase in the forced convection heat transfer coefficient for a pipe by passing the fluid through a narrow spiral cut in the pipe.
Different spiral pipes with pitches of two, four, eight, ten, sixteen, and twenty inches were used; however, the width of the spiral cut remained unchanged at 3/16 of an inch. Several mass flow rates for water were used up to a maximum of 1536 lbs/hr for each run.
One of the objectives was to find which pitch would give the highest heat transfer rate for a given flow rate. The second was to find which spiral pipe would give the highest consistent values of heat transfer for the over-all range of mass flow.
It was found that a pipe with a pitch of eight inches had the highest rate of heat transfer for all cases. It will be interesting to note that there is an increase in the heat transfer rate of 77 percent over a plain pipe at the lowest mass flow rate, 798 lbs/hr, and at the highest flow rate, 1536 lbs/hr, there was a 38 percent increase in the heat transfer rate. All of the spiral pipes tested show an increase in the heat transfer coefficient compared with a plain pipe"--Abstract, page 8.
Miles, Aaron J.
Schaefer, Rodney A., 1926-2002
Lee, Ralph E., 1921-2010
Edwards, Charles L., 1934-
Mechanical and Aerospace Engineering
M.S. in Mechanical Engineering
Missouri School of Mines and Metallurgy
© 1961 Nicholas W. Barre, All rights reserved.
Thesis - Open Access
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Barre, Nicholas W., "Effect of boundary layer control, through spiral cuts, on the film coefficient of convective heat transfer" (1961). Masters Theses. 2736.