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Alternate approximate function for kernel function of oscillating lifting surfaces

Prediction of unsteady aerodynamic loads is still the most challenging task in flutter aeroelastic analysis. Generally the numerical estimation of steady and unsteady aerodynamic of thin lifting surface is conducted based on an integral equation relating aerodynamic pressure and normal wash velocity...

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Main Authors: Sulaeman, Erwin, Layeeq, Ahmed
Format: Conference or Workshop Item
Language:English
English
Published: 2013
Subjects:
TL500 Aeronautics
Online Access:http://irep.iium.edu.my/34456/1/Paper_30176_-_Camera_ready.pdf
http://irep.iium.edu.my/34456/4/programbookicmaae13.pdf
http://irep.iium.edu.my/34456/
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spelling my.iium.irep.344562014-01-20T03:25:52Z http://irep.iium.edu.my/34456/ Alternate approximate function for kernel function of oscillating lifting surfaces Sulaeman, Erwin Layeeq, Ahmed TL500 Aeronautics Prediction of unsteady aerodynamic loads is still the most challenging task in flutter aeroelastic analysis. Generally the numerical estimation of steady and unsteady aerodynamic of thin lifting surface is conducted based on an integral equation relating aerodynamic pressure and normal wash velocity. The present work attempts to increase the accuracy of the prediction by using an approximate approach to evaluate kernel function occurring in the integral equation. Following previous approximation approach to solve the cylindrical function for planar lifting surface, in the present work such approach is extended to non planar lifting surfaces. To increase the accuracy of the method, the integration region of the kernel function is divided into two parts namely near and far regions, where a nonlinear regression curve fitting technique is adapted to approximate the denominator part of the cylindrical function of each region. 2013-07 Conference or Workshop Item REM application/pdf en http://irep.iium.edu.my/34456/1/Paper_30176_-_Camera_ready.pdf application/pdf en http://irep.iium.edu.my/34456/4/programbookicmaae13.pdf Sulaeman, Erwin and Layeeq, Ahmed (2013) Alternate approximate function for kernel function of oscillating lifting surfaces. In: International Conference on Mechanical, Automotive and Aerospace Engineering 2013, 2 - 4 July 2013, Berjaya Time Square Hotel, Kuala Lumpur. (Unpublished)
institution Universiti Islam Antarabangsa Malaysia
building IIUM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider International Islamic University Malaysia
content_source IIUM Repository (IREP)
url_provider http://irep.iium.edu.my/
language English
English
topic TL500 Aeronautics
spellingShingle TL500 Aeronautics
Sulaeman, Erwin
Layeeq, Ahmed
Alternate approximate function for kernel function of oscillating lifting surfaces
description Prediction of unsteady aerodynamic loads is still the most challenging task in flutter aeroelastic analysis. Generally the numerical estimation of steady and unsteady aerodynamic of thin lifting surface is conducted based on an integral equation relating aerodynamic pressure and normal wash velocity. The present work attempts to increase the accuracy of the prediction by using an approximate approach to evaluate kernel function occurring in the integral equation. Following previous approximation approach to solve the cylindrical function for planar lifting surface, in the present work such approach is extended to non planar lifting surfaces. To increase the accuracy of the method, the integration region of the kernel function is divided into two parts namely near and far regions, where a nonlinear regression curve fitting technique is adapted to approximate the denominator part of the cylindrical function of each region.
format Conference or Workshop Item
author Sulaeman, Erwin
Layeeq, Ahmed
author_facet Sulaeman, Erwin
Layeeq, Ahmed
author_sort Sulaeman, Erwin
title Alternate approximate function for kernel function of oscillating lifting surfaces
title_short Alternate approximate function for kernel function of oscillating lifting surfaces
title_full Alternate approximate function for kernel function of oscillating lifting surfaces
title_fullStr Alternate approximate function for kernel function of oscillating lifting surfaces
title_full_unstemmed Alternate approximate function for kernel function of oscillating lifting surfaces
title_sort alternate approximate function for kernel function of oscillating lifting surfaces
publishDate 2013
url http://irep.iium.edu.my/34456/1/Paper_30176_-_Camera_ready.pdf
http://irep.iium.edu.my/34456/4/programbookicmaae13.pdf
http://irep.iium.edu.my/34456/
_version_ 1643610629386272768
score 13.211869

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