Journal of Engineering Physics and Thermophysics
is a translation of Inzhenerno-fizicheskii Zhurnal,
a publication of the Academic Scientific Complex
"A. V. Luikov Heat and Mass Transfer Institute"
of the National Academy of Sciences of Belarus
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HEAT TRANSFER INVOLVING THE LAMINAR-TURBULENT TRANSITION
AND THE ENHANCED TURBULENCE OF AN EXTERNAL FLOW
E. P. Dyban and E. Ya. Epik
UDC 536.24:532.526
Experimental data on heat transfer and friction in the presence
of a bypass laminar-turbulent transition in a flow with an increased
degree of turbulence Tue = 3.2-7% are reported.
It is shown that several types of bypass transition can occur depending
on the turbulence scale: from laminar to turbulent, from pseudolaminar
to quasiturbulent, and combination. It is established that the mechanism
of the transition is related to the selective properties of the wall
boundary layers developed in its presence. A tendency toward the development
of an upper thermal transition in turbulized flows is established.
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