Fan blade design

The novel fan blade design with a primary and secondary airfoil in a slotted configuration optimizes air movement at reduced angles of incidence, enhancing airflow efficiency and performance by minimizing separation and increasing pressure differential, resulting in significant airflow improvements.

US20240418089A1Pending Publication Date: 2024-12-19BERMUDEZ ONOPA RAMON DAVID +1
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Patent Information

Application Number
US18/211400
Authority / Receiving Office
US · United States
Patent Type
Applications(United States)
Current Assignee / Owner
Filing Date
2023-06-19
Publication Date
2024-12-19

AI Technical Summary

Technical Problem

Conventional fan blade designs require higher angles of incidence to achieve significant air movement, leading to inefficiencies and increased airflow separation, whereas the goal is to enhance air movement at reduced angles of incidence.

Method used

A novel fan blade design featuring a primary airfoil with a longer chord and a secondary smaller chord airfoil in a slotted configuration, with a twist along the span to optimize angle of incidence, minimizing airflow separation and increasing downward air movement by creating a higher pressure differential between the upper and lower surfaces.

Benefits of technology

The design achieves a 31% increase in airflow at a reduced angle of incidence, producing faster and thicker downdrafts with improved performance compared to traditional flat blade designs, as demonstrated by 2D and 3D analyses.

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Abstract

The novel fan blade functions by capturing the air mass via an upper, larger airfoil with a lower, smaller chord airfoil arrangement that channels air through the slot between the larger and smaller airfoil that are both twisted along the span of the blade. This design generates air movement more effectively and achieves significantly better performance than a traditional fan blade design.
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Citation Information

Patent Citations

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