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Nozzle for Enhanced Impingement Cooling

IP.com Disclosure Number: IPCOM000121310D
Original Publication Date: 1991-Aug-01
Included in the Prior Art Database: 2005-Apr-03
Document File: 2 page(s) / 51K

Publishing Venue

IBM

Related People

Vader, DT: AUTHOR

Abstract

An impinging jet(s) 1 of gas or liquid can be used to dissipate heat from a computer chip or other surface 2. A conventional circular or rectangular jet is formed by passing fluid through a circular hole or a slot 3 in a suitable jet plate 4.

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Nozzle for Enhanced Impingement Cooling

      An impinging jet(s) 1 of  gas or liquid can be used to
dissipate heat from a computer chip or other surface 2.  A
conventional circular or rectangular jet is formed by passing fluid
through a circular hole or a slot 3 in a suitable jet plate 4.

      The disclosed nozzle (orifice) shapes enhance cooling by
increasing laminar and/or turbulent vorticity in the jet. The
enhancement is a known result of stretching vortex lines in the
impingement region.  Only vortex lines with the proper orientation,
however, are stretched.  This vorticity is generated in the new
nozzles as the coolant flows over surfaces and edges 7, 10, 13 and 16
that are co-planar or near co-planar with both the direction of flow
through the nozzle and the direction of flow along the heated surface
away from the stagnation line. Such surfaces can be designed into
nozzles to generate radial or linear flows along the heated surface.
A jet for radial flow is formed by a modified circular nozzle 5
having radial fingers 6 that protrude from the circumference toward
the center of the nozzle.  A compound nozzle 8 for a radial flow jet
is comprised of a radial array of narrow slots 9. A jet to generate
flow that is linear along the heated surface is formed by a modified
rectangular nozzle 11 having fingers 12 that protrude from the edges
and toward the center of the slot.  A compound nozzle 14 for a linear
flow is comprised of a rectangular array of narrow...