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Investigation on the aerodynamic performance of an ejection seat

Published online by Cambridge University Press:  03 February 2016

D. H. Chen ,
W. H. Wu ,
J. J. Wang  and
Y. Huang
D. H. Chen
Affiliation:
Beijing University of Aeronautics and Astronautics (BUAA), Beijing, China China Aerodynamics Research and Development Center (CARDC), Mianyang, China
W. H. Wu
Affiliation:
Beijing University of Aeronautics and Astronautics (BUAA), Beijing, China China Aerodynamics Research and Development Center (CARDC), Mianyang, China
J. J. Wang
Affiliation:
Beijing University of Aeronautics and Astronautics (BUAA), Beijing, China
Y. Huang
Affiliation:
China Aerodynamics Research and Development Center (CARDC), Mianyang, China
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Abstract

A unique experimental method is used, in combination with numerical calculation and engineering estimation, to study the aerodynamic performance of an ejection seat at M = 0·60, 0·90 and 1·20, angles-of-attack α = 0°~360°, and sideslip angles (β = 0°~–90°. Several basic characteristics of the aerodynamic performance are explored. The normal force of the ejection seat varies in a sinusoidal way and the axial force in a cosinoidal way, with the angle-of-attack. The model is statically unstable longitudinally at most attitude angles and the longitudinal stability could be improved by a stabiliser. These characteristics result from a large low pressure area caused by the leeward separation and the windward high pressure area in the ejection seat flow field, at all α, due to the blunt configuration. A set of engineering calculation formulae is deduced, based on the aerodynamic characteristics of the ejection seat.

Type
Research Article
Information
The Aeronautical Journal , Volume 111 , Issue 1120 , June 2007 , pp. 373 - 380
Copyright
Copyright © Royal Aeronautical Society 2007 

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