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Extension of analytical indicial aerodynamics to generic trapezoidal wings in subsonic flow

Extension of analytical indicial aerodynamics to generic trapezoidal wings in subsonic flow
Extension of analytical indicial aerodynamics to generic trapezoidal wings in subsonic flow
Analytical indicial aerodynamic functions are calculated for a number of trapezoidal wings in subsonic ow, with Mach number 0:3 M 0:7. The formulation herein proposed extends wellknown aerodynamic theories, which are limited to thin aerofoils in incompressible ow, to generic trapezoidal wing planforms. First, a thorough study is executed to assess the accuracy and limitation of analytical predictions, using unsteady results from two state of the art computational fluid dynamics solvers as cross validated benchmark. Indicial functions are calculated for a step change in angle of attack and for a sharp edge gust, each for four wing configurations and three Mach numbers. Then, analytical and computational indicial responses are used to predict dynamic derivatives and the maximum lift coefficient following the encounter with a one-minus-cosine gust. It is found that the analytical results are in excellent agreement with the computational results for all test cases. In particular, the deviation of the analytical results from the computational results is within the scatter or uncertainty in the data arising from using two computational fluid dynamics solvers. This indicates the usefulness of the developed analytical theories.
1000-9361
Da Ronch, Andrea
a2f36b97-b881-44e9-8a78-dd76fdf82f1a
Kharlamov, Daniel
79b001cf-ae0a-4867-b38b-fcd73bb76bac
Ventura, A.
e839189f-9c32-4aa1-8ece-6a9ecc6ed4bf
Righi, M.
e3997eb5-41c9-47a0-90ec-d6f97b0cf60b
Franciolini, Matteo
ff98a7b3-a108-44ef-96a1-3b4a3c7eed6d
Berci, M.
bf2c8658-535f-4d4d-ba55-9e4922f853ba
Da Ronch, Andrea
a2f36b97-b881-44e9-8a78-dd76fdf82f1a
Kharlamov, Daniel
79b001cf-ae0a-4867-b38b-fcd73bb76bac
Ventura, A.
e839189f-9c32-4aa1-8ece-6a9ecc6ed4bf
Righi, M.
e3997eb5-41c9-47a0-90ec-d6f97b0cf60b
Franciolini, Matteo
ff98a7b3-a108-44ef-96a1-3b4a3c7eed6d
Berci, M.
bf2c8658-535f-4d4d-ba55-9e4922f853ba

Da Ronch, Andrea, Kharlamov, Daniel, Ventura, A., Righi, M., Franciolini, Matteo and Berci, M. (2017) Extension of analytical indicial aerodynamics to generic trapezoidal wings in subsonic flow Chinese Journal of Aeronautics (In Press).

Record type: Article

Abstract

Analytical indicial aerodynamic functions are calculated for a number of trapezoidal wings in subsonic ow, with Mach number 0:3 M 0:7. The formulation herein proposed extends wellknown aerodynamic theories, which are limited to thin aerofoils in incompressible ow, to generic trapezoidal wing planforms. First, a thorough study is executed to assess the accuracy and limitation of analytical predictions, using unsteady results from two state of the art computational fluid dynamics solvers as cross validated benchmark. Indicial functions are calculated for a step change in angle of attack and for a sharp edge gust, each for four wing configurations and three Mach numbers. Then, analytical and computational indicial responses are used to predict dynamic derivatives and the maximum lift coefficient following the encounter with a one-minus-cosine gust. It is found that the analytical results are in excellent agreement with the computational results for all test cases. In particular, the deviation of the analytical results from the computational results is within the scatter or uncertainty in the data arising from using two computational fluid dynamics solvers. This indicates the usefulness of the developed analytical theories.

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Accepted/In Press date: 28 August 2017

Identifiers

Local EPrints ID: 415241
URI: http://eprints.soton.ac.uk/id/eprint/415241
ISSN: 1000-9361
PURE UUID: 0f4f193a-4daf-47ed-97e8-2404acb536c1

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Date deposited: 06 Nov 2017 17:30
Last modified: 27 Nov 2017 05:01

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Contributors

Author: Andrea Da Ronch
Author: Daniel Kharlamov
Author: A. Ventura
Author: M. Righi
Author: Matteo Franciolini
Author: M. Berci

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