Abstract
The isothermal pressure drop of porous iron whisker matrices, bronze wire mesh screens and small stainless steel spheres has been measured in the region of very small Reynolds-numbers Re ⋍ 10 −2 . The results are discussed applying physical models for laminar flow producing small wakes downstream and the influence of the filling factor k of the different samples is considered. Using the porous material as a low temperature thermal regenerator, the pressure drop is shown to reduce the thermal efficiency of the regenerative cooling process.
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