Review on Development Techniques of Small-Scale Axial Flow Fans

Abstract

This review presents a comprehensive state-of-the-art overview of recent studies devoted to optimizing the aerodynamic performance of small-scale axial flow fans by adjusting critical design parameters. Key focus areas include winglet configurations, blade geometry, casing treatments, and tip clearance, all of which directly impact efficiency, pressure development, and noise levels. The paper is organized into two main parts: the first explores how each parameter affects aerodynamic performance, while the second estimates the research methodologies used to model, simulate, and optimize the behavior. Emphasis is placed on computational approaches, including CFD, surrogate modeling, and multi-objective optimization. By integrating insights from design and methodological perspectives, this review identifies effective optimization strategies, evaluates trade-offs among techniques, and provides a solid foundation for guiding upcoming aerodynamic enhancements in axial fan systems.