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July 10, 2026Journal of the Korean Society for Aeronautical & Space Sciences

Investigation on Aerodynamic Characteristics of a Coaxial Helicopter With Varying Configuration Elements

Chan-Young Kim Min-Gi Chae Min-Hyoung Ryu Phil-Kwon Shin Byoung-Soo Lee So-Eun Lee Hye Jin Jung Seong-Jin Park

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Key Points

This research aims to analyze how specific configuration elements affect the aerodynamic characteristics of coaxial helicopters.
Conducted wind tunnel experiments using a subsonic wind tunnel at Kunkuk University.
Evaluated four configurations of a testing model combining fuselage, hub, shaft fairing, and stabilizers.
Cross-validated experimental results with CFD simulations using STAR-CCM+.
The discrepancy between experimental and CFD outcomes was within an average of 2.2% over a ±9° angle of attack.
A hub structure on the coaxial rotor increased drag by approximately 29% compared to the drag of the fuselage without the hub.
Applying an airfoil-shaped fairing to the shaft reduced drag by about 16%.

Implication

Experimental and CFD analysis examines aerodynamic impacts of design variations in coaxial helicopters.

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Cite This Study

Kim et al. (2026) studied this question.

synapsesocial.com/papers/6a532e624f7abc118adecb86 https://doi.org/10.5139/jksas.2026.54.7.691

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