Abstract
Cooperating with spiral corrugation on the inner wall is a passive further heat transfer enhancement method for the smooth helical tube. Numerical simulation was performed to give the turbulent flow and temperature fields in helical tubes cooperating with spiral corrugation. The effects of the spiral corrugation parameters and Reynolds number on the flow and heat transfer were studied. The results show that the spiral corrugation can further enhance heat transfer of the smooth helical tube due to the additional swirling motion. Decrease of the pith of spiral corrugation can enhance heat transfer in the tube. Within the research scope, helical tubes cooperating with spiral corrugation show 50-80% increase of heat transfer while the flow resistance is 50-300% larger than that in the smooth helical tube.
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