Assessment of viscosity effects on high-speed coolant pump performance

• DOI: 10.1063/5.0208753
• Publication Date: 2024-05-07T22:15:47Z
• Authors: Dongcheng Wang; Yandong Gu; Christopher Stephen; Wenpeng Zhao; Qingfeng Ji
• Keywords: Specific speed

The high-speed coolant pump facilitates thermal regulation in electric vehicle components, including batteries and motors, by circulating an ethylene glycol solution. This commonly used fluid exhibits a notable negative correlation with temperature terms of viscosity. Numerical simulations investigate the transient dynamics operating at 6000 rpm, driving flow various temperatures. A test rig is established, performance evaluated under different conditions. numerical temperatures align well experimental outcomes. Decreasing temperatures, from 100 to −20 °C, lead reduced head efficiency due increased Specifically, rate 30 L/min, decreases 40.03% 44.19%. With escalating viscosity, best point shifts toward lower rates. Notable impacts on both disk hydraulic are observed viscosity fluctuations. It exerts minimal influence volumetric elevated rates but has substantial impact Increased causes uneven pressure distribution within pump, altering velocity profiles impeller. High-viscosity fluids tend form large-scale vortex structures around blades, reducing thrust exerted blades fluid. Higher results larger increasing frictional resistance. study findings provide valuable insights for advancement high-efficiency, energy-saving, pumps tailored vehicles.