The underbody diffuser is a key part of automotive aerodynamics, as its design and optimization needs to combine fluid mechanics and thermodynamics principles. This report studies the basic working principles, research advancements, real-world applications, and key design challenges of the underbody diffuser. It also analyzes how the diffuser improves vehicle aerodynamic performance while interacting with thermal management systems, and to discuss common optimization strategies used in engineering practice.
Zhang et al. (Wed,) studied this question.