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Fig. 1. Coplanar channel:

a

— is a channel general arrangement;

b

— is a channel-developed view

forces in the interfin channels on the opposite sides of the circuit. Oppositely

directed cross-vortex flows interact through the mixing layer.

In the layer of cross flows mixing, continuous deformation and

transformation of the interacting flows boundary layers occur that determine

the complex pattern of their interaction mechanisms accompanied by an

impulse, heat, and mass transfer.

The heat transfer intensification in this channel is determined by

a combination of several interaction mechanisms, such as a generation of

turbulent pulses in the mixing layer and their transfer by a vortex flow

onto the exposed surface of the interfin channels; a substitution of hot

layers of a heat agent near the heat-release surfaces with colder layers of

the opposite periphery flows.

The experimental analysis of CC thermal hydraulic characteristics

(THC) was conducted under the following conditions. The fins angles

were both symmetrical and nonsymmetrical within the range of the total

angle

2

β

= 45

. . .

120

, the fins height on the heat-release surface

h

1

constituted a half of the channel height

h

. The profile of the interfin

channels characterized by the fin height to the channel width ratio

χ

=

h

1

/a

was symmetrical and asymmetrical in the range of

χ

= 0

.

25

. . .

1

.

1

, and the

range of the relative fin pitch ratio

ˉ

t

=

t/δ

f

on the heat removing surface

constituted 2.36. . . 7.00, the range of flow modes was Re

= 10

3

. . .

6

10

4

.

There was a low fin density across the tops, which resulted in heat transfer

into the adjacent fins approaching zero.

ISSN 0236-3941. HERALD of the BMSTU. Series Mechanical Engineering. 2015. No. 2 45