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Volume 74 - February 1970

Contents

Page 9 of 14

Research Article

  • Shock Patterns for Simple Caret Wings

  • J. Venn, J. W. Flower
  • Published online by Cambridge University Press:
    04 July 2016, pp. 339-348

  • The equations defining compressible flow are sufficiently complicated to preclude general analysis, but, in particular cases, can often be simplified and manipulated into a form amenable to solution. Problems connected with aircraft have, in the past, usually fallen into this category, where the non-linear equations can be simplified to a linear form and reasonably accurate solutions deduced. At hypersonic speeds, however, the more usual assumptions become invalid, no reasonable simplification can be made, and, except in certain specialised cases, no solutions can be deduced. Hence the problem of deriving the flow pattern around some specified shape becomes, in general, insoluble. The simple caret wing was proposed seven years ago by Nonweiler to avoid such difficulty. His elegant idea was to reverse the normal process of deducing the flow field round a given body shape, and instead to deduce body shapes that would generate specific, simple, flow patterns. From known flow fields lifting bodies may be obtained, by replacing .streamlines with solid surfaces, and the caret wing is one example. Nonweiler’s original notion has sin:e been extended by a number of people.

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Technical Notes

  • The Venting of Multi-Cell Structures

  • J. W. Flower
  • Published online by Cambridge University Press:
    04 July 2016, pp. 241-243

  • The modern high performance aircraft has thin wings, usually of multispar construction leading to a structure composed of a number of cells arranged chordwise rather than spanwise. The high performance gives a rate of climb that needs almost to be measured in thousands of feet per second rather than thousands of feet per minute, and hence the aircraft experiences an external pressure that is changing extremely rapidly with time.

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Front matter

  • AER Volume 74 issue 712 Cover and Front matter

  • Published online by Cambridge University Press:
    04 July 2016, pp. f1-f5
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Page 9 of 14