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Some effects of sweep direction and strakes for wings with sharp leading edges

Published online by Cambridge University Press:  04 July 2016

D. I. A. Poll  and
Cheng-Hao Qiu
D. I. A. Poll
Affiliation:
College of Aeronautics, Cranfield Institute of Technology, Bedford, England
Cheng-Hao Qiu
Affiliation:
Peking Institute of Aeronautics and Astronautics, Peking, China
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Summary

An experimental investigation has been carried out to compare the effects of sweep direction upon the aerodynamic characteristics of three wing planforms. The wings have biconvex aerofoil sections which allow them to be tested in both the forward-swept and backward-swept configurations without changing the section profile. Measurements of lift, drag and pitching moment have been made for angles of incidence in the range —5° to +50° at a mean chord Reynolds number of approximately 1·5 × 105 and a Mach number of 0·1. To complement the force and moment data a comprehensive series of oil-flow visualisations are also presented. In addition the aerodynamic characteristics of simple strakes (wing root fillets) have been studied for both the swept-forward and swept-back configurations.

Type
Research Article
Information
The Aeronautical Journal , Volume 88 , Issue 878 , October 1984 , pp. 337 - 347
Copyright
Copyright © Royal Aeronautical Society 1984 

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