- Patent 5,353,865 describes a way to greatly increase
impingement heat transfer with negligible increase in coolant pressure
drop. The method involves casting
the impinged surface with a close-packed array of small diameter
hemispheres. The hemispheres
increase the heat transfer area.
They also add thermal resistance, but the additional resistance is
minimized by making the hemisphere diameters very small.
- Patent 5,269,468 describes a fuel nozzle design that
eliminates or minimizes the vaporization of fuel as it passes through the
nozzle. The minimization of fuel
vaporization results from a heat shield consisting of an air gap with gold
plated surfaces. The immediate application
was gas turbine fuel nozzles.
- Patent 4,978,230 describes an apparatus and method for determining heat transfer coefficient
based on testing actual hardware rather than simplistic scale models of
such hardware. The immediate
application was gas turbine airfoils.
- Patent 4,916,715 describes a method and apparatus for measuring the distribution of heat flux
and heat transfer coefficients on the surface of a cooled component used
in a high temperature environment.
The immediate application was gas turbine blades and vanes
undergoing engine test programs.
- Patent 4,902,139 describes “thermal check”, a bench test for measuring the thermal performance of heating or
cooling circuits. (Thermal check
is the thermal analog of “flow check”, a bench test for measuring the flow
performance of heating or cooling circuits.) The immediate application was cooling circuits in gas
Thermal check is also
described in Thermal Check--A Simple and Accurate
Bench Test for Measuring the As-built Heat Transfer Performance of Cooling or
Heating Circuits in Gas Turbine Components, ASME HTD-Vol. 226, p.17,
presented at ASME 1992 Winter Annual Meeting, November, Anaheim, CA.
- Patent 3,827,102 describes how to use a soot blower as a Pneumatic
Temperature Detector to measure the temperature of the coolant as it exits
the soot blower, and to measure the heat flow rate and the heat flux into
the soot blower. Also describes
how to use the measurements to control a water-cooled soot blower so that
most of the water is vaporized before it is expelled from the soot blower.
- Patent 3,542,486 describes an impingement insert—ie a
hollow insert to be placed within a hollow component, and which has an
array of close-packed holes through with coolant is passed, and which then
impinges on the surface to be cooled or heated. The immediate application was gas turbine vanes and blades.
- Patent 3,388,888 describes a thermally effective cooling
circuit for a gas turbine blade.
Prior to this design, blade cooling was generally accomplished by
passing coolant through radial holes, a method that resulted in poor