A theory of the high-aspect-ratio jet flap

Kerney, Keith P.

doi:10.2514/3.6198

Cited by 4 publications

References 5 publications

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An Alternative Approach to the High Aspect Ratio Wing With Jet Flap by Matched Asymptotic Expansions

Kida

Miyai

1978

Aeronautical Quarterly

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SummaryAn alternative method is described for solving the problem of a three-dimensional jet-flapped wing with a high aspect-ratio. This method is similar to the lifting-line theory of Kerney6 or Tokuda7, but differs in that the method of matched asymptotic expansions is applied to an integral equation, derived from the lifting surface theory, rather than a partial differential equation. The advantage of the present method over those used previously is that the necessary outer solutions are obtained directly; it is not necessary to rely upon physical insight or considerable ingenuity. The final results are different from those obtained by the previous authors; it is shown that the present result is correct, by noting some errors in the earlier theories.

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An Alternative Approach to the High Aspect Ratio Wing With Jet Flap by Matched Asymptotic Expansions

Kida

Miyai

1978

Aeronautical Quarterly

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Analysis of High-Aspect Ratio Jet-Flap Wings of Arbitrary Geometry

Lissaman

1974

Journal of Aircraft

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The results converge properly to all known limit cases, and correlation with other known theoretical solutions for jet-flap wings is good. It is found that, although the method is a lifting-line technique, good accuracy was obtained for aspect ratios as low as 4. Correlation with experimental data was as good as other techniques, but it is pointed out that few properly controlled and corrected experimental tests are known. It is believed that the accuracy of this method is quite adequate for jet-flap wing design and that the speed and flexibility of the program make it very suitable for preliminary design.

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Analysis of high aspect ratio jet flap wings of arbitrary geometry

Lissaman

1973

11th Aerospace Sciences Meeting

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The method of Maskell and Spence was developed for a special class of wings of elliptical planform and loading. The present method generalizes this to handle straight, uncambered wings of arbitrary planform, twist, and blowing (including unsymmetrical cases). An analytical procedure is developed for continuous variations in the above geometric data with special functions to exactly treat discontinuities in any of the geometric and blowing data. A rational theory for the effect of finite wing thickness is introduced as well as simplified concepts of effective aspect ratio for rapidhand estimation of performance.The procedure has been programed and prints out all relevant data. Each wing case takes less than six seconds on the CDC 6600.The results converge properly to all known limit cases, and correlation with other known theoretical solutions for jet-flap wings is good. It is found that, although the method is a lifting-line technique, good accuracy was obtained for aspect ratios as low as 4. Correlation with experimental data was as good as other techniques, but it is pointed out that few properly controlled and corrected experimental tests are known.It is believed that the accuracy of this method is quite adequate for jet-flap wing design and that the speed and flexibility of the program make it very suitable for preliminary design.

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A theory of the high-aspect-ratio jet flap

Cited by 4 publications

References 5 publications

An Alternative Approach to the High Aspect Ratio Wing With Jet Flap by Matched Asymptotic Expansions

An Alternative Approach to the High Aspect Ratio Wing With Jet Flap by Matched Asymptotic Expansions

Analysis of High-Aspect Ratio Jet-Flap Wings of Arbitrary Geometry

Analysis of high aspect ratio jet flap wings of arbitrary geometry

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