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On the aerodynamic characteristics of thin slab delta wings at hypersonic speeds — part 1: interference of lee side bodies

Published online by Cambridge University Press:  04 July 2016

R. Ramesh ,
M. A. Ramaswamy ,
B. Vasudevan  and
A. Prabhu
R. Ramesh
Affiliation:
Indian Institute of Science, Bangalore, India
M. A. Ramaswamy
Affiliation:
Indian Institute of Science, Bangalore, India
B. Vasudevan
Affiliation:
Indian Institute of Science, Bangalore, India
A. Prabhu
Affiliation:
Indian Institute of Science, Bangalore, India
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Abstract

An experimental investigation on the interference effect of lee-side balance housing bodies on the longitudinal aerodynamic characteristics of thin slab delta wings has been made using a special and novel thin three-component balance. This study has been conducted using wings with a t/c of 0.053 and sweep of 76°, 70° and 65° for three different lee-side bodies viz:Body (A), Body (B) and Body (C) of which Body (C) is the smallest. The testing was carried out at Mach number of 8·2, Reynolds number of 2·13 ˘ 106 and incidence of –4° to 12°. For the smallest body (Body (C)) tested, at the incidence at which this body first goes into the aerodynamic shadow of the wing (α = 6·5°), the difference in CN, CA, CM and L/D between the wing-body and the plain wing is around by 22%, 12%, 75% and 35% respectively. This difference decreases with increase in incidence and at the highest angle-of-attack up to which testing was done (α = 12°), the. corresponding values of CN, CA, CM and L/D are around 9%, 12%, 15% and 4% respectively. Contrary to the assumption in the literature pertinent to force measurements on thin slab delta wings, the interference of the lee-side bodies are found to be appreciable even after they come into the aerodynamic shadow of the wing.

Type
Research Article
Information
The Aeronautical Journal , Volume 104 , Issue 1041 , November 2000 , pp. 561 - 567
Copyright
Copyright © Royal Aeronautical Society 2000 

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