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/ http://irep.iium.edu.my/34456/1/Paper_30176_-_Camera_ready.pdf http://irep.iium.edu.my/34456/4/programbookicmaae13.pdf

id	iium-34456
recordtype	eprints
spelling	iium-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 PeerReviewed 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 (Unpublished)
repository_type	Digital Repository
institution_category	Local University
institution	International Islamic University Malaysia
building	IIUM Repository
collection	Online Access
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/ http://irep.iium.edu.my/34456/1/Paper_30176_-_Camera_ready.pdf http://irep.iium.edu.my/34456/4/programbookicmaae13.pdf
first_indexed	2023-09-18T20:49:39Z
last_indexed	2023-09-18T20:49:39Z
_version_	1777409908820410368

Alternate approximate function for kernel function of oscillating lifting surfaces

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