The cross-flow plate-type intercooler Page: 3 of 53
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A large number of plate-type intercoolers can be designed
for a given performance, such as given weight flows, pressure
drops, densities, end inlet and outlet temperatures of the charge
and cooling air. These intercoolers will differ in size, shape,
and meiSht, and it is the purpose of this paper to show the rela-
tions between these factors and the plate spacings. These rela-
tions indicate how intercooler eize may be either.reuoed. or ad-
Justed to the available space.
A plate-type intercooler having spaces of "0.025 inch between
adjacent plates and haing a length of 2.30 inches in the direction
of cooling-air flow and 4.30 inches in the. direction of charge-air
flow na tested, and the results are presented herein. In order
to reduce the plate deflections in actual intercooler operation
due to the pressure difference be twe the chark e air and the cool-
ing air across each plate, the plates were curved in the direction
of cooling-air flow with a radius of 3.5 inches. This interooaler
test unit does not represent an optimum -design; it was built and
tested merely to check the theoretical heat-transfer and pressure-
drop equations presented in this report
This work was done by the fAA at the Langley Menorial Aero-
nautical Laboratory at Langley Field, Va., in 1941,
M weight rate of air flow, pounded per second
I length of flow passage measured in direction of flow,
feet (or inches where designated)
a plate spacing (perpendicular distance between adja-
cent faces of adjacent plates), feet (or inches
d equivalent diameter of flow passages (four times cross
section divided by wetted perinetor), feet
r ratio of equivalent diameter of passages formed by
parallel flat plates of finite width to equiva-
lent diameter of flow passages (2 /d)
t plate thickness, feet (or inches where designated)
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Pinkel, Benjamin; Reuter, J. George & Valerino, Michael F. The cross-flow plate-type intercooler, report, April 1942; (digital.library.unt.edu/ark:/67531/metadc62071/m1/3/: accessed February 23, 2019), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.