Jet Impingement Cooling in VSCF Generators

A cooling technique is devised which will maintain the electronics within their thermal operating limits when the power output of currently used VSCFs is augmented to 65 kVA from 40 kVA. This study suggests that the use of jet impingement cooling selectively applied in regions of high heat flux will support the enhancement in performance desired. Experiments were run to determine the forced convective cooling of the current VSCF design. Experiments were then run to determine the submerged jet impingement cooling characteristics. Finally a FEA numerical model of the SCR module mounted on the tube flange with forced convection and jet impingement cooling was set up. The FE analysis indicates that at 65 kVA submerged jet impingement cooling will mitigate the temperatures of the SCRs sufficiently to maintain them within their operating envelope.