Email this article To the Problem of Friction Minimization on Permeable Surfaces at Supersonic Flow Rate
- Authors: Garaev K.G.1, Mukhametzyanov I.R.2
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Affiliations:
- Tupolev Kazan National Research Technical University
- Chistopol Branch “Vostok”
- Issue: Vol 61, No 3 (2018)
- Pages: 391-395
- Section: Aero- and Gas-Dynamics of Flight Vehicles and Their Engines
- URL: https://journals.rcsi.science/1068-7998/article/view/230602
- DOI: https://doi.org/10.3103/S106879981803011X
- ID: 230602
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Abstract
In this paper, we consider the variational problem of minimizing the Newtonian drag on an airfoil in a supersonic gas flow. A new condition for Lagrange multipliers on the streamlined airfoil was found that can be used to construct an optimal law for injection control in the analytical form. It is shown that for the flow around wedges, this control is finite at the stagnation point that is important in terms of practical realization of the optimal control.
About the authors
K. G. Garaev
Tupolev Kazan National Research Technical University
Email: m.ilshat@mail.ru
Russian Federation, ul. Karla Marksa 10, Kazan, 420111
I. R. Mukhametzyanov
Chistopol Branch “Vostok”
Author for correspondence.
Email: m.ilshat@mail.ru
Russian Federation, ul. Engel’sa 127a, Chistopol Tatarstan, 422981
