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Recent advances in lifting surface methods

Published online by Cambridge University Press:  04 July 2016

D. D. Liu ,
P. C. Chen ,
Z. X. Yao  and
D. Sarhaddi
D. D. Liu
Affiliation:
Department of Mechanical and Aerospace Engineering , Arizona Stale University , Tempe, Arizona , USA
P. C. Chen
Affiliation:
ZONA Technology , Mesa, Arizona , USA
Z. X. Yao
Affiliation:
ZONA Technology , Mesa, Arizona , USA
D. Sarhaddi
Affiliation:
ZONA Technology , Mesa, Arizona , USA
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Abstract

Recent advances in two lifting surface methods are reported. The present subsonic constant pressure method improves upon the program robustness of the doublet lattice method. The present unified supersonic-hypersonic method extends the range of applicability of lifting surface theory to the Newtonian limit. Based on a uniformly-valid series formulation, the method accurately approximates the non-linear thickness effect, whereas this effect is neglected by the linear theory and overestimated by piston theory. In fact, the present results generally agree well with the trends of several Euler solutions. Among other findings, cases computed by the unified method confirm that the effect of thickness is to reduce the supersonic flutter speed.

Type
Research Article
Information
The Aeronautical Journal , Volume 100 , Issue 998 , October 1996 , pp. 327 - 340
Copyright
Copyright © Royal Aeronautical Society 1996 

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Footnotes

†

Professor, mechanical & aerospace engineering

‡

vice president

*

Member of technical staff

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