Design and Optimization of an SUV Engine Compartment Undershield based on Latin Hypercube Design Method and Multi-island Genetic Algorithm
2022-01-0201
03/29/2022
- Event
- Content
- Vehicle engine compartment thermal management performance ensures engine performance and reduces pollutant emissions, and a suitable temperature range in the engine compartment during vehicle operation is critical to reducing carbon emissions. The design of the engine compartment components affects the thermal fluid flow performance in the engine compartment, which in turn affects the engine compartment thermal management performance, so it is necessary to explore the optimization of engine compartment components. In this paper, based on the phenomenon that the engine compartment undershield of an SUV caused abnormally high temperature on the surface of the engine compartment parts due to design defects, the engine compartment was modeled and simulated by STAR-CCM+, and it was found that the undershield caused hot air flow back, which was not conducive to engine compartment heat dissipation, so the undershield needed to be redesigned. The shape of the undershield was redesigned and several dimensions were selected as design parameters. The highest temperature of the oil pan surface was selected as the optimization target, and the Latin Hypercube Design Method was used to uniformly sample the space, construct the experimental design scheme and simulate it, and use the Multi-island Genetic Algorithm to cruise the simulation results to obtain the optimal design scheme. It is verified that the optimal design scheme can reduce the maximum oil pan surface temperature by 7℃ and the undershield temperature near the high temperature exhaust pipe by 10℃ under the same working condition, and the heat flow in the cabin flows out smoothly, and improves the heat backflow phenomenon.
- Citation
- Liu, Y., "Design and Optimization of an SUV Engine Compartment Undershield based on Latin Hypercube Design Method and Multi-island Genetic Algorithm," SAE Technical Paper 2022-01-0201, 2022, .