An Eulerian?Eulerian two-fluid model together with the RPI boiling model was used to simulate the three-dimensional unsteady subcooled boiling flow in high pressure tubes. The effect of vortex generator on the subcooled boiling was investigated through the simulation. The tube fluid dynamics of vortex generator in laminar flow and the subcooled boiling process with the vortex generator in turbulent flow were simulated. The simulation indicated that the heat transfer capacity was obviously enhanced under laminar flow conditions by the vortex generator. The heat transfer capacity in the tube was only slightly improved in the case of subcooled boiling, and the bubbles near the wall were affected by the disturbance of the fluid. The bubbles near the wall surface were largely entangled into the delta wing due to the disturbance of the fluid. Therefore, the possibility of generating a gas film near the wall surface was reduced, and delayed the starting point position of subcooled boiling.
Xin CHEN Qi XIAO Xiaoping GUAN Ning YANG
. Simulation of enhanced heat transfer in subcooled boiling tube of vortex generator inserts[J]. The Chinese Journal of Process Engineering, 2019
, 19(3)
: 524
-532
.
DOI: 10.12034/j.issn.1009-606X.218281
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