Bionic front-back adjustable camber-variable guide vane and design method thereof

A bionic and variable technology, applied in mechanical equipment, non-variable-capacity pumps, components of pumping devices for elastic fluids, etc. The problems of aggravated airflow separation and increased loss have achieved the effect of widening the available corner range and low total pressure loss

Pending Publication Date: 2022-04-12
AIR FORCE UNIV PLA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the front and rear adjustable variable camber guide vanes also have problems. With the increase of the front vane rotation angle, the increase of the front vane aerodynamic angle of attack will lead to aggravated airflow separation on the suction surface, which will lead to increased losses, which limits the front and rear adjustable variable camber guide vanes. Leaf's scope of work

Method used

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  • Bionic front-back adjustable camber-variable guide vane and design method thereof
  • Bionic front-back adjustable camber-variable guide vane and design method thereof
  • Bionic front-back adjustable camber-variable guide vane and design method thereof

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Embodiment Construction

[0028] Embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although certain embodiments of the invention are shown in the drawings, it should be understood that the invention may be embodied in various forms and should not be construed as limited to the embodiments set forth herein; A more thorough and complete understanding of the present invention. It should be understood that the drawings and embodiments of the present invention are for exemplary purposes only, and are not intended to limit the protection scope of the present invention.

[0029] In the present invention, unless stated otherwise, the used orientation words such as "upper, lower, top, bottom" are usually for the directions shown in the drawings, or for the parts themselves in the vertical, In terms of vertical or gravitational direction; similarly, for the convenience of understanding and description, "inner and outer" refer to the inner an...

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Abstract

The invention discloses a bionic front and back adjustable variable camber guide vane which comprises a front vane and a back vane, the tail edge of the front vane is round, the front edge of the back vane is round, the tail edge of the front vane and the front edge of the back vane are tangent to the intersection point of a mean camber line and the tail edge of the front vane, and the front vane is formed by stacking a series of elements periodically changing along the front edge of the front vane. The front edge of the front blade is distributed in a wave-shaped curve mode, the wave-shaped curve is a sine curve, and the curve equation of the wave-shaped curve is LEh = LEorii + cos (Hb/W * pi) * A. The invention further discloses a design method of the bionic front-back adjustable camber-variable guide vane. According to the invention, the front edge of the front and back adjustable and variable camber guide vane is provided with the knot-shaped bulge which changes according to a sinusoidal curve and has a certain wavelength and amplitude, so that the effects of controlling the airflow separation of the back vane, reducing the total pressure loss of the variable camber guide vane and widening the available rotating angle range are achieved.

Description

technical field [0001] The invention relates to the technical field of aero-engines, in particular to a bionic front and rear adjustable variable curvature guide vane and a design method thereof. Background technique [0002] In aero-engines and ground gas turbines, in order to keep the compressor from stalling under all operating conditions, it is necessary to set some adjustment mechanisms to maintain a large surge margin for the compressor, among which adjustable guide vanes are an important and Regulatory measures that are widely used. The currently used adjustable guide vanes are generally divided into two types, one is the overall adjustable and mostly used in the front stage of the high-pressure compressor; the other is the semi-adjustable variable curvature guide vane, that is, the guide vane is divided into the front vane and the front vane. The rear leaf, the front leaf is fixed, and the rear leaf is adjustable as a whole, which is mostly used for the inlet of the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04D29/46F04D29/56F04D29/66G06F30/15G06F30/17
Inventor 尉洋张斐黄国栋于锦禄王志多张小博李鹏皓
Owner AIR FORCE UNIV PLA
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