Abstract: Flutter is a complex dynamic aeroelastic problem that poses a significant threat to flight safety, making its mitigation a critical focus of aeronautical research. This study proposes a two-dimensional prepositive elliptical wing-main wing combined configuration and investigates its influence on flutter characteristics. Based on structural dynamics, a reduced-order aeroelastic model of the two-dimensional combined configuration is established. The critical flutter velocities of configurations with and without the prepositive elliptical wing are computed using the eigenvalue method. The results from a representative case show that the configuration yields a critical flutter speed enhancement of up to 43.59%. Through a parametric design space exploration, a range of effective design parameters is identified: for chordwise placement within 0.04c (where c is the main wing chord) directly in front of the main wing, a pre-wing with a long axis of 0.02c, short axis of 0.005c, and aspect ratio of 4 is recommended. For distances beyond 0.04c, a diagonal arrangement above and ahead of the main wing is more effective, with a recommended long axis of 0.01c, a short axis of 0.005c, and an aspect ratio of 2.

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