Improved doublet lattice formulation for calculating aerodynamic loads on lifting surfaces in unsteady subsonic flow

Michael Brendel; Erwin Sulaeman

Improved doublet lattice formulation for calculating aerodynamic loads on lifting surfaces in unsteady subsonic flow

Michael Brendel, Erwin Sulaeman

Research output: Contribution to conference › Paper › peer-review

Abstract

A modified formulation for the Doublet Lattice Method for calculating unsteady aerodynamic loads on multiple interfering lifting surfaces in subsonic flows is considered. Singular and regular parts of the kernel function are identified and treated separately. A Gauss-Legendre integration technique is used to integrate the regular part while the singular part is solved based on the expansion series of Ueda using an exact integration procedure. Numerical difficulties associated with near-coplanar surfaces have not been encountered with the present formulation. Properties of the kernel function as well as application to an AGARD Wing-Horizontal tail configuration are presented.

Original language	English
Pages	633-638
Number of pages	6
Publication status	Published - 1994
Externally published	Yes
Event	12th Applied Aerodynamics Conference, 1994 - Colorado Springs, United States Duration: Jun 20 1994 → Jun 23 1994

Conference

Conference	12th Applied Aerodynamics Conference, 1994
Country/Territory	United States
City	Colorado Springs
Period	6/20/94 → 6/23/94

ASJC Scopus subject areas

Aerospace Engineering
Mechanical Engineering

Cite this

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title = "Improved doublet lattice formulation for calculating aerodynamic loads on lifting surfaces in unsteady subsonic flow",

abstract = "A modified formulation for the Doublet Lattice Method for calculating unsteady aerodynamic loads on multiple interfering lifting surfaces in subsonic flows is considered. Singular and regular parts of the kernel function are identified and treated separately. A Gauss-Legendre integration technique is used to integrate the regular part while the singular part is solved based on the expansion series of Ueda using an exact integration procedure. Numerical difficulties associated with near-coplanar surfaces have not been encountered with the present formulation. Properties of the kernel function as well as application to an AGARD Wing-Horizontal tail configuration are presented.",

author = "Michael Brendel and Erwin Sulaeman",

note = "Publisher Copyright: {\textcopyright} 1994 by the American Institute of Aeronautics and Astronautics. Inc.; 12th Applied Aerodynamics Conference, 1994 ; Conference date: 20-06-1994 Through 23-06-1994",

year = "1994",

language = "English",

pages = "633--638",

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TY - CONF

T1 - Improved doublet lattice formulation for calculating aerodynamic loads on lifting surfaces in unsteady subsonic flow

AU - Brendel, Michael

AU - Sulaeman, Erwin

PY - 1994

Y1 - 1994

N2 - A modified formulation for the Doublet Lattice Method for calculating unsteady aerodynamic loads on multiple interfering lifting surfaces in subsonic flows is considered. Singular and regular parts of the kernel function are identified and treated separately. A Gauss-Legendre integration technique is used to integrate the regular part while the singular part is solved based on the expansion series of Ueda using an exact integration procedure. Numerical difficulties associated with near-coplanar surfaces have not been encountered with the present formulation. Properties of the kernel function as well as application to an AGARD Wing-Horizontal tail configuration are presented.

AB - A modified formulation for the Doublet Lattice Method for calculating unsteady aerodynamic loads on multiple interfering lifting surfaces in subsonic flows is considered. Singular and regular parts of the kernel function are identified and treated separately. A Gauss-Legendre integration technique is used to integrate the regular part while the singular part is solved based on the expansion series of Ueda using an exact integration procedure. Numerical difficulties associated with near-coplanar surfaces have not been encountered with the present formulation. Properties of the kernel function as well as application to an AGARD Wing-Horizontal tail configuration are presented.

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UR - http://www.scopus.com/inward/citedby.url?scp=85006272386&partnerID=8YFLogxK

M3 - Paper

AN - SCOPUS:85006272386

SP - 633

EP - 638

T2 - 12th Applied Aerodynamics Conference, 1994

Y2 - 20 June 1994 through 23 June 1994

ER -

Improved doublet lattice formulation for calculating aerodynamic loads on lifting surfaces in unsteady subsonic flow

Abstract

Conference

ASJC Scopus subject areas

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