Decision trees in the problem of defining the aircraft element class for the subsequent determination of surface pressure
Authors: Bulgakov V.N., Ratslav R.A., Sapozhnikov D.A., Chernyshev I.V.
Published in issue: #10(82)/2018
DOI: 10.18698/2308-6033-2018-10-1810
Category: Aviation and Rocket-Space Engineering | Chapter: Aerodynamics and Heat Transfer Processes in Aircrafts
The article describes the solution of the problem of classification of aircraft surface elements with the subsequent target determination of the pressure coefficient at the body constituent parts by the method of local surfaces. A sectional body including spherical, conical, planar and cylindrical surfaces was considered as an object for classification and characterization. The decision tree was used as a method for classification. The grid on the body was obtained by the grid self-organization algorithm. To estimate aerodynamic characteristics, initial-analytic approximations and exact dependences were used. The results were compared with the calculated data obtained in the framework of a rigorous mathematical formulation. The results of the target application of the method of local surfaces are in good agreement with the calculations. The proposed method can be used both for independent estimates of the sectional body streamlining parameters and for specifying the initial approximation in calculations within the framework of a rigorous mathematical formulation of the system of gas dynamics equations
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