Hostname: page-component-7dd5485656-wjfd9 Total loading time: 0 Render date: 2025-10-29T23:47:05.907Z Has data issue: false hasContentIssue false
  • English
  • Français

Evaluation of the Downwash Integral for Rectangular Planforms by the BAC Subsonic Lifting-Surface Method

Published online by Cambridge University Press:  07 June 2016

W Kellaway
W Kellaway*
Affiliation:
British Aircraft Corporation, Preston
Get access

Summary

The BAC subsonic lifting-surface method is applied to the problem of evaluating the downwash at the surface of wings of rectangular planform subjected to particular loadings and the results are compared with a set of datum results. Over 95 per cent of the wing span the results of the BAC method are shown to be accurate to within 0.01 per cent, irrespective of chordwise position.

Information

Type
Research Article
Information
Aeronautical Quarterly , Volume 23 , Issue 3 , August 1972 , pp. 181 - 187
Copyright
Copyright © Royal Aeronautical Society. 1972

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

Article purchase

Temporarily unavailable

References

1. Ray, Valerie A Miller, G F Numerical evaluation of the downwash integral for a lifting rectangular planform. NPL Report Maths 90, December 1970.Google Scholar
2. Lehrian, Doris E Garner, H C Convergence of current routines for evaluating downwash at a lifting surface. NPL Aero Note 1095, ARC 32 397, September 1970.Google Scholar
3. Garner, H C Fox, D A Algol 60 programme for Multhopp’s low-frequency lifting-surface theory. ARC R & M 3517, April 1966.Google Scholar
4. Zandbergen, P J Labrujere, Th E Wouters, J G A new approach to the numerical solution of the equation of subsonic lifting surface theory. NLR (Amsterdam) Report TR G-49, November 1967.Google Scholar
5. Garner, H C Miller, G F Analytical and numerical studies of downwash over rectangular planforms. Aeronautical Quarterly, Vol XXIII, p 169, August 1972.Google Scholar
6. Hewitt, B L Kellaway, W A new treatment of the subsonic lifting surface problem using curvilinear coordinates. Part I. Details of the method as applied to regular surfaces with finite tip chords and a preliminary set of numerical results. BAC Preston Division Report Ae 290, S & T Memo 20/68, August 1968.Google Scholar
7. Kellaway, W A new treatment of the subsonic lifting-surface problem using curvilinear coordinates. Part III. Details of computer programs. BAC Preston Division Report Ae 290, May 1969.Google Scholar
8. Kellaway, W The accuracy of the BAC subsonic lifting surface method in evaluating the down-wash integral for rectangular planforms. BAC Military Aircraft Division Report Ae/A/346, October 1971.Google Scholar
9. Sells, C C L Calculation of the downwash on the centre line of a swept wing with given load distribution. RAE Tech Report 70146, August 1970.Google Scholar
10. Sells, C C L An iterative method for the calculation of the loading on a thin unswept wing. RAE Technical Report 72009, January 1972.Google Scholar