The influence of tube surface roughness produced by selective laser melting on the efficiency of an air-to-air heat exchanger
Published: 17.09.2024
Authors: Agapov A.V., Ionov A.V.
Published in issue: #9(153)/2024
DOI: 10.18698/2308-6033-2024-9-2388
Category: Aviation and Rocket-Space Engineering | Chapter: Thermal, Electric Jet Engines, and Power Plants of Aircrafts
The paper considers how tube surface roughness obtained by selective laser melting influences on the efficiency of an air-to-air heat exchanger. During the study, a sample was designed, subsequently printed on a selective laser melting machine; and the sample roughness was measured in different areas. Mathematical modeling of conjugate heat exchange in a tube section was performed. In one case, a smooth part was modeled, in the other one, the roughness measured on a printed sample was taken into account when modelling. A comparison of the results was carried out, according to which a significant effect of roughness on hydraulic resistance was revealed.This shows the need to take it into account when designing an air-to-air heat exchanger for production using selective laser melting and the mandatory post-print processing of the product.
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