Heat Transfer in Highly Turbulent Separated Flows: A Review

The study of flows with a high degree turbulence in boundary layers, near-wall jets, gas curtains, separated behind various obstacles, as well during combustion is great importance for increasing energy efficiency the flow around elements ducts gas-dynamic installations. This paper gives some general characteristics experimental work on friction and heat transfer smooth surface, curtains under conditions increased free-stream turbulence. Taking into account significant effect external dynamics flows, similar obstacles analyzed. First all, classical cases separation single backward-facing step rib are considered. Then, more complex oriented at different angles to analyzed, system ribs transverse trench straight inclined walls turbulent them. features turbulized stream cylinder, leading an increase width vortex wake, frequency separation, average coefficient results author compared data other researchers. structure turbulence—characteristic dimensions region, parameters mixing layer, pressure distribution—are low-turbulent flow. Much attention paid thermal characteristics: temperature profiles across shear distributions over local coefficients. It shown that has much stronger than layer flat surface. For its intensifying pronounced step. factor intensification by most cavity ribs.