In this study, a high-voltage heater system with a size of 310 mm ? 210 mm ?
60 mm has been numerically studied and experimentally verified to explore
the influence of the cavity structure on the flow and heat transfer
performance. the response surface model and analysis of variance are used to
determine the influence of the length of the mainstream area of the inlet
(Lin), the length of the mainstream area of the outlet (Lout), the length of
the parallel flow channel (Lch) and the single channel width (W) on the flow
heat transfer, and ultimately find the best structural plan. The results
show that the structural parameters of the parallel flow channel are
significantly more important than those of the mainstream area, with the
width and length of the parallel single channel being the primary and
secondary structural parameters, respectively. The optimization scheme
obtained by the NGSA-II algorithm can simultaneously meet the requirements
of heat transfer and flow uniformity. Specifically, compared with the
original model, the flow distribution uniformity coefficient (S) and the
inlet/outlet pressure drop (Ptotal) decreased by 53.49 and 19.52%,
respectively, while the average heat transfer coefficient increased by
28.05%.