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DETERMINATION OF THE AERODYNAMIC CHARACTERISTICS FOR AGRICULTURAL UAVS IN UNSTEADY FLOW

DETERMINATION OF THE AERODYNAMIC CHARACTERISTICS FOR AGRICULTURAL UAVS IN UNSTEADY FLOW

Abstract

 The purpose of work is estimation of unsteady flow influence on the aerodynamic characteristics of the aircraft with several lifting surfaces. The work presents characteristic features of specialized agricultural aircraft operation based on the specifics of modern agriculture.The most significant factors affecting the efficiency agricultural aircraft were identified.The features of a non-stationary aerodynamics for agricultural aircraft with several supporting surfaces were viewed and the calculation results of aerodynamic characteristics, which depend on the basic parameters of the lifting surfaces, were shown. The mutual influence of lifting surfaces on the aerodynamic characteristics of the aircraft was estimated.To take into account the impact of interference between the bearing surfaces, such as adverse effects of shading one bearing surface by another, used computer panel-symmetric vortex flow modeling method because the nature of pull unsteady flow dissemination around a wing is very similar to the case pull steady flow.For a finding of system parameters, which could provide the best value for the aerodynamic qualities of a multiple bearing surfaces have been used all sorts of variations of these parameters, and then made their linear interpolation.The main parameters, which were considered in this research, of a multi-carrier surfaces system were vertical and horizontal distances between surfaces with forward removal one by one of each wing.The results show, which range of input parameters of multiple bearing surfaces system has the best aerodynamic efficiency.The research was used for design of the UAV to perform aviation chemical works.

Цель работы - оценка влияния нестационарного обтекания на аэродинамические характеристики самолета с несколькими несущими поверхностями.В работе представлены характерные особенности эксплуатации специализированных сельскохозяйственных самолетов с учетом современной специфики сельского хозяйства. Определены наиболее значимые факторы, влияющие на эффективность сельхозсамолета.Рассмотрены особенности нестационарной аэродинамики сельскохозяйственного самолета с несколькими несущими повер хностями и представлены результаты расчета аэродинамических характеристик в зависимости от основных параметров системы несущих поверхностей. Проведена оценка взаимного влияния несущих поверхностей на аэродинамические характеристики самолета.

Представлені характерні особливості експлуатації спеціалізованих сільськогосподарських літаків з урахуванням сучасної специфіки сільського господарства. Визначено найбільш значущі фактори, що впливають на ефективність сільхозлітака. Розглянені особливості нестаціонарної аеродинаміки сільськогосподарського літака з декількома несучими поверхнями та представлені результати розрахунку аеродинамічних характеристик в залежності від основних параметрів системи несучих поверхонь.

Keywords

aviation chemical works, биплан, biplane, aerodynamic characteristics, авіаційні хімічні роботи, нестационарное обтекание, авиационные химические работы, нестаціонарне обтікання, біплан, unsteady flow, аэродинамические характеристики, аеродинамічні характеристики

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
0
Average
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