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Thermophysics and Aeromechanics

2017 year, number 4

Heat transfer from a cylinder in pulsating cross-flow

V.M. Molochnikov1,2, N.I. Mikheev1,2, A.N. Mikheev1, and A.A. Paereliy1

1Kazan Scientific Center RAS, Kazan, Russia

2Kazan National Research Technical University named after A.N.Tupolev, Kazan, Russia

E-mail: vmolochnikov@mail.ru
Keywords: heat transfer, cylinder in cross-flow, forced flow pulsations, dimensionless number, empirical correlation, correction factor
Pages: 569–575

Abstract

The paper presents results on heat transfer from a cylinder in pulsating flow. The results are local heat transfer distributions that match four different flow modes identified previously by the authors. A new kind of dimensionless number was introduced for pulsating flows: this is a ratio of flow acceleration during unsteady movement to the centrifugal acceleration due to streamlines bending over the cylinder. The experimental data were generalized as a dependency of the average heat transfer on the new dimensionless criterion. The generalization offered a correction factor to a traditional relation for heat transfer between a cylinder and air flow past the cylinder; this correction takes into account the effect of parameters of forced flow pulsations on the average heat transfer.

DOI: 10.1134/S0869864317040084