Optimization of Parametres of the Aerodynamic Stand Meant for Free Flight of the Human in Air Jet
Nataļja Sidenko

28.01.2013. 15:00, TMF, Aeronautikas inst., Lomanosova ielā 1, k-1, 220.aud.

Valērijs Ušakovs

Aleksandrs Januševskis, Viktors Gopejenko, Vladimirs Šestakovs

In the introduction are considered general lines for the development of constructions of stands for sports flights in vertical air jet. Special attention is paid to the modern constructions of aerodynamic stands, which vary in design, size, range of speeds, and ways of creating a stream. Reviewed the principle of operation of the simplest constructions, intended to create a vertical air stream of large diameter. Highlighted main advantages and disadvantages of modern constructions. Performed the analysis of modern engineering methods of calculation of the elements of stands structures. Formulated the relevance of research, aims and objectives of the dissertation. In the first chapter is formulated basic method of computer simulation and calculation of parameters of large diameter vertical air jet generators (or open wind tunnels generating the air jets). The method includes main steps for this class and contains the main characteristic details inherent in this task. The method enables parametric computer calculations which pretty accurately model researched physical phenomena and allow defining their interesting the practice characteristics. Calculation of developed aerodynamic stands must be done by means of the known engineering CAD/CAE programs that ensure compliance with all the necessary work to be done in a reasonable time period. In the second chapter developed method of computer simulation and optimization of geometric and aerodynamic characteristics of single elements of aerodynamic stands. The method allows using 3D parametric computer simulation packages SolidWorks and CFDesign to create different 3D modifications of geometric models and perform their virtual blowing reaching required geometric and aerodynamic parameters of developed stands. Method allows relatively quickly to obtain results, satisfactorily corresponding with the data of natural experiment or known theoretical calculations confirming, the adequacy of the method. In the third chapter developed the computer simulation and optimization method of geometric and aerodynamic parameters of different modifications of aerodinamics stends (single screw and multi-screw). On the basis of the developed method was created a universal air jet generator designed to create conditions for the free flight of human in the vertical air stream. Universal generator can be used for both mobile and stationary aerodynamic stands. Computer simulation of complex volumetric constructions of wind tunnel with symmetrically placed fans allowed resolution of a number of tasks such as connecting the sections of air channels, taking into account to the necessary narrowing and widening angles, smooth transitions and turns of channels, pairing a several channels, taking into account the restrictions of curvature and rotation of the corners. Using developed methods have been developed computer models on which base were designed and installed single screw and multi-screw aerodynamic stands.

aerodynamic stand, computer modelling , numerical experiment , the airscrew (fan) - rectifying apparatus - gas-dynamic channel

Sidenko, Nataļja. Optimization of Parametres of the Aerodynamic Stand Meant for Free Flight of the Human in Air Jet. PhD Thesis. Rīga: [RTU], 2013. 130 p.

Publication language
English (en)
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