Intensification of heat transfer in an impact jet with a fractal lattice at the entrance,
S.N. Yakovenko
Khristianovich Institute of Theoretical and Applied Mechanics SB RAS, Novosibirsk, Russia
Keywords: impact jet, passive control, heat transfer, numerical simulation
Abstract
An impact jet with passive control of mixing and heat transfer with the use of a lattice at the entrance is nume-rically studied. It is shown that the local Nusselt number at the stagnation point on the heated surface from which the jet is pushed and the Nusselt number averaged over the domain with intense heat transfer increase with increasing Reynolds number in accordance with a power law corresponding to the empirical approximation. It is found that ad-dition of a lattice, especially fractal lattice, leads to noticeable enhancement of heat transfer in the central part of the jet. The results of the study are compared with effects predicted by computations, and the prospects of further investigations are determined.
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