Abstract
This study investigates a high-speed centrifugal turbo blower with an impeller diameter of 33 mm. The turbo blower is applied to the lithium-ion battery cooling systems of electric vehicles, and is advantageous because of its high flow rate. The blower is an axial flow centrifugal blower that changes the radial kinetic energy of the impeller to axial kinetic energy. The high-speed turbulent flow inside the turbo blower is numerically simulated with a compressible k-ω turbulence model. To predict blower performance, the static pressure and flow rate are calculated for 50,000, 80,000, 110,000, 140,000 and 170,000 RPM. We present a turbo blower operated at 110,000 RPM with 67.6% efficiency that can be applied to a 2 kW air-cooled lithium-ion battery pack.
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