Aerodynamic design of a gliding transport container

Abstract

The study is devoted to determining the influence of the gliding transport container layout parameters on its basic aerodynamic characteristics such as the maximum value of aerodynamic perfection, characteristics of longitudinal stability and bearing properties depending on the presence of finite aerodynamic surfaces and the center of gravity position.The simulation of the calculation models flow of the gliding transport container layout with different positions of the center of gravity is performed using computational aerodynamics methods (panel-vortex method). The aerodynamic characteristics are obtained, the analysis of the change in the value of the balancing velocity and the criteria of static longitudinal stability are carried out. An estimation of static longitudinal stability at various positions of the center of weight of a flying wing is carried out.Due to the results of the aerodynamic characteristics mathematical modeling, it is established that the "flying wing" scheme is the most suitable for the gliding transport container layout. The simplified scheme of the pyramidal type (technologically simple variant № 1) for the gliding transport container layout is unacceptable because of the failure to meet the requirements for stability and maximum aerodynamic perfection, primarily due to the presence of a developed separation of flow from the rear edge.. The geometry of the gliding container for the "flying wing" scheme is made up of technological profiles consisting of an elliptical and straight lines. Application of finite aerodynamic surfaces in the gliding container layout allows to significantly increase the maximum value of the KMAX and ensures that the condition of stability is satisfied. Application of finite aerodynamic surfaces in the layout also contributes to increasing the maximum bearing properties of the wing due to the beneficial effect on the final aerodynamic wing vortex.Automatic balancing implementation of the gliding container in the gliding mode with the maximum value of the КМАХ is possible by providing the position of the center of gravity in the position . Changing the position of the center of gravity of the gliding container within allows you to adjust the planning speed within ± 40% .The main results are presented in graphical form for all calculation models.