Device for adjusting wing surface of wing wind tunnel blowing model and adjustment method

Abstract

The invention relates to a device for adjusting the wing surface of a wing wind tunnel blowing model and an adjustment method. In the device provided by the invention, the width of a support base is equal to the chordwise length of the wing wind tunnel blowing model; the length of the support base is equal to the spanwise length of the wing wind tunnel blowing model; multiple rows of actuators are distributed along the length direction of the support base; each row of actuators comprises multiple actuators; each actuator is respectively positioned on each design point of the wing and corresponds to the horizontal ordinates of each design point of the wing; the actuators are installed on the upper surface and lower surface of the support base in pairs; and the actuators in the same column on the same surface are connected through a data line and used for receiving the same control signals and carrying out the equal amplitude displacement. The invention provides a convenient and practical wing surface deformation adjusting mechanism for the wing surface deformation based on the wing shape design of a wind tunnel experiment, establishes a high-efficiency wing shape optimization design system by means of the environment and conditions of the wind tunnel experiment and provides different wing shape results for the engineering actually, thereby improving the design level and design efficiency of the existing wing shape.

Description

technical field [0001] The invention relates to the field of test technology in the field of modern aerospace, in particular to a device and an adjustment method for adjusting the airfoil surface of an airfoil model blown by a wind tunnel. Background technique [0002] The airfoil refers to the cross-sectional shape of the aircraft wing. The wing is the main lift component of the aircraft. The plane shape of the wing is basically determined by the flight speed of the aircraft and the weight of the aircraft. Once the plane shape of the wing is established, the performance of the wing Good or bad depends entirely on the aerodynamic performance of the airfoil, so the airfoil is a basic element that has been continuously studied in the aerospace field for a long time. [0003] Because of the special value of the airfoil, since the 1930s, the United States has developed the famous NACA 4-digit, 5-digit series airfoils and 6-series airfoils. Advanced aviation countries such as th...

AI Technical Summary

Problems solved by technology

[0004] Although the method of airfoil design based on CFD has been developed rapidly, there are still the following problems: (1) As an airfoil optimization design method, especially the airfoil design method using the global optimization algorithm, it often requires a large number of airfoil flow According to relevant literature, the optimal design of an airfoil shape may require as many as thousands of flow field calculations

However, the amount of calculation for solving the basic aerodynamic equation (Navier-Stokes equation) is very large. For this reason, people still use the approximate flow field analysis method, but it brings the loss of accuracy, which affects the design quality of the airfoil.

(2) Even if the huge amount of calculation of CFD is not considered, at the current level of CFD, due to the unsolved theoretical problems of the turbulence problem itself, there are great uncertainties in the factors of the transition from laminar flow to turbulent flow, so even if the current best CFD software cannot guarantee the design of the most reliable and excellent airfoil

However, the existing wing deformation technology cannot achieve small deformation at specific points, nor can it efficiently realize repeated airfoil design through computer control, and it is difficult to meet the needs of optimal design.

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