A novel feather wing bionic ventilation flapping wing system and a multi-vortex interference mechanism analysis method

Abstract

The invention belongs to the technical field of cross of bionics and aerodynamics, and discloses a novel feather-wing bionic ventilation flapping wing system and a multi-vortex interference mechanismanalysis method, so as to derive and describe a motion equation set and capture the vortex motion tracks. The method is characterized by analyzing the influence rules of the dynamic aerodynamic characteristics, the flow rules, the dynamic vortex structures and the vortex interference characteristics of the ventilation flapping wing system. The invention provides a multi-body model design of the novel feather wing bionic ventilation flapping wing system, and provides an aerodynamic shape and a flapping scheme, so that the design thought of the micro flapping-wing aircraft is expanded, and the aerodynamic characteristics are improved, the influence rules of the parameter changes of different fluttering frequencies, fluttering angles, fluttering inclination angles, Reynolds numbers and the like on the lift resistance characteristics, the thrust characteristics, the flow rules, the dynamic vortex structures and the like of the ventilation flapping wing layout are concluded and summarized,and the dynamic aerodynamic force between the moving winglet and the main flapping wing and a multi-vortex interference mechanism of the dynamic aerodynamic force are summarized.

Description

technical field [0001] The invention belongs to the interdisciplinary technical field of bionics and aerodynamics, and in particular relates to a novel wing bionic ventilation flapping wing system and a multi-eddy interference mechanism analysis method. Background technique [0002] At present, the existing technologies commonly used in the industry are as follows: [0003] Different from ordinary fixed-wing and rotary-wing aircraft, the main feature of the micro flapping-wing aircraft (Micro ir vehicle) is that it integrates the functions of lifting, hovering and propulsion into one flapping-wing system, which has strong maneuverability. And it can carry out long-distance flight with very little energy, and is more suitable for performing tasks under long-term non-energy replenishment and long-distance conditions. It has very important and extensive application prospects in the military and civil aviation fields. In addition, the flapping wing system can also generate a lo...

AI Technical Summary

Problems solved by technology

[0010] (1) Most of the theories, experiments and numerical simulations process or simplify the flapping wing model into a closed dynamic wing surface, which is actually related to the fact that the flight feathers open and close in a timely manner during the actual flight of birds. There is a big difference, which cannot accurately reflect the laws of sports science;

[0011] (2) The existing technology cannot well solve the technical problems such as the simple up and down fluttering of the airfoil at low Reynolds numbers cannot generate enough lift to balance its own weight and load, and cannot provide the power required for flight;

[0012] (3) Conventional technical research only stays at the flapping action itself, but for the dynamic aerodynamic characteristics of the new wing bionic ventilation flapping wing system and the formation of the leading edge shedding vortex along the span and chord direction and the wing tip vortex in the wake area , development and evolution laws have not yet been involved; a series of issues such as the influence of different geometric sizes and flapping parameters on the dynamic aerodynamic force and flow field distribution of the entire bionic ventilation flapping wing system have not been studied in depth.

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