An Experimental Determination of Heat Transfer and Flow Friction Characteristics of Perforated Material for Compact Heat Exchanger Surfaces.

摘要

The transient testing technique for the determination of heat transfercharacteristics of a porous medium has been known since 1929. Itrequires a good deal of care and one of the important restrictions is astep change in temperature must be applied to the medium at the beginningof a test run. This thesis involves the design, test and evaluation ofan experimental set-up that utilizes an "integral heater" to accomplishthe step change in temperature. In addition, there is presented heattransfer and flow friction characteristics for a 20° skew matrix constructedfrom perforated nickel material. This data is compared to a20° skew matrix made from stainless steel material that has been previouslyreported by C. P. Howard. Also, data is presented for two "parallelplate" matrices, one constructed from brass sheet, the other fromperforated nickel material. A comparison of their relative performancesis made.