Variable-curvature arc equal-thickness plate wing section for fan group

Abstract

The invention relates to a variable-curvature arc equal-thickness plate wing section for a fan group, and particularly to eight high-performance equal-thickness plate wing sections which are designed by applying an advanced pneumatic analysis technology in the aviation technology and aiming at the practical work condition of a fan with a small size, a low rotating speed and a low Reynolds number (generally less than 106). The invention discloses the maximum camber and position of the group of the wing sections; f is the maximum camber; xf is a transverse coordinate value at the maximum camber place of the wing section; C is a chord length; the original point of the coordinate system where the wing section locates is defined as the front edge point of a mean camber line of the wing section; the X-axis is overlapped with a chord line and points from the front edge of the wing section to the back edge of the wing section; and the Y-axis is vertical to the X-axis which points to the bending direction of the middle arc line of the wing section. Under the same work condition, the fan adopting the variable-curvature arc equal-thickness wing section when being compared with the traditional simple equal-thickness wing section fan is better matched with the practical work condition, has greater blowing rate of the fan, lower noise, higher energy efficiency value (the energy efficiency value=blowing rate / power), higher maximum air speed value and uniform air speed.

Description

technical field [0001] The invention relates to a set of high-performance equal-thickness-plate airfoils for fans, in particular to eight low-speed fans with low Reynolds numbers (generally less than 10 6 ) is a variable-curvature arc-shaped equal-thickness plate airfoil designed for special working conditions. Background technique [0002] With the development of industrial technology, low-speed fans are more and more widely used in residential life and industrial production, such as household electric fans, ventilation fans, cooling fans, etc. However, the blade airfoil of the traditional low-speed fan has become less and less suitable for the pursuit of high efficiency, energy saving and low noise. [0003] The fan blade is the main component that determines the performance of the fan, and the cross-sectional shape (airfoil) of the blade is the key to determining the performance of the fan blade. There are a variety of airfoils in the existing literature. Among them, th...

AI Technical Summary

Problems solved by technology

[0004] The present invention provides a set of high-performance variable-curvature arc-shaped equal-thick-plate airfoils for fans, which can be well Matching low-speed fans with low Reynolds number, and after being applied to fan blades, it can significantly improve fan efficiency and reduce fan noise

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