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Tiempo de formación del vórtice universal del vuelo de aleteo
Yukun Sun1, Emily Palmer2, Christopher Dougherty1
1Department of Biological and Environmental Engineering, Cornell University, Ithaca, NY 14853.
Resumen
Una nueva ley de escala, el tiempo de formación de vórtice generalizado, explica el vuelo biológico entre especies y condiciones. Este principio, basado en la maximización de la circulación de vórtices de vanguardia, ofrece un marco universal para comprender la locomoción animal.
Área de la Ciencia:
- La aerodinámica
- Biomecánica
- Dinámica de fluidos
Sus antecedentes:
- Los voladores biológicos generan propulsión a través del aleteo de apéndices, con cinemáticas de vuelo estudiadas a través de leyes de escala.
- El número de Strouhal (St) es una métrica común para el vuelo de crucero, pero depende de las condiciones.
- Los vórtices de vanguardia (LEV) son cruciales para generar fuerzas propulsivas en vuelo de aleteo.
Objetivo del estudio:
- Desarrollar una ley de escala universal para el vuelo biológico independiente de las condiciones específicas de vuelo.
- Para generalizar el concepto de tiempo de formación de vórtice para el vuelo de aleteo.
- Proporcionar un marco unificador para la comprensión del movimiento biológico.
Principales métodos:
- Desarrolló un tiempo de formación de vórtice generalizado basado en la maximización de la circulación LEV.
- Escaló la duración de la inyección de vorticidad con el crecimiento de la vorticidad y la vorticidad máxima permitida.
- Comparamos la nueva ley de escala con el número de Strouhal de los datos de vuelo de 28 especies.
Principales resultados:
- El tiempo de formación del vórtice generalizado es consistente a través de diversos animales voladores y pasos de crucero.
- Esta nueva métrica es independiente de las condiciones específicas de vuelo, a diferencia del número de Strouhal.
- Demostró un marco unificador para el análisis de la dinámica de vuelo de aleteo.
Conclusiones:
- El tiempo de formación del vórtice generalizado ofrece un principio fundamental para comprender el vuelo biológico.
- Este hallazgo avanza en el estudio de la cinemática compleja del ala en la naturaleza.
- Destaca un enfoque universal para el análisis del movimiento biológico.
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