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Biomimetic processing method for leading edge of blade at end area

A technology for the leading edge of a blade and a treatment method, which is applied to the components of the pumping device for elastic fluid, the non-variable displacement pump, the machine/engine, etc., to achieve the effect of improving the aerodynamic performance and improving the efficiency of the whole machine

Inactive Publication Date: 2011-04-27
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The original conventional blades of the turbine in the prior art are as figure 1 As shown, the contact surface between the end and the end wall is conventionally in contact, and the leading edge processing technology adopts a band or spherical structure, and similar structures control the development of the horseshoe vortex to a certain extent.

Method used

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  • Biomimetic processing method for leading edge of blade at end area
  • Biomimetic processing method for leading edge of blade at end area
  • Biomimetic processing method for leading edge of blade at end area

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Embodiment Construction

[0026] In order to better illustrate the purpose and advantages of the present invention, the content of the invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0027] In this embodiment, an axial flow compressor blade (NACA65 airfoil) is redesigned according to the method described in the content of the invention, and its effect is verified by numerical simulation. The relevant pneumatic parameters of this embodiment are as follows: the total inlet pressure is 103379Pa, the incoming flow Mach number is 0.2, and the outlet static pressure is 101325Pa.

[0028] The specific implementation process of this embodiment is as follows:

[0029] Step 1. According to the original airfoil data, the geometric parameters of the cascade and the aerodynamic parameters, the shape of the original compressor blade is given, such as figure 1 shown;

[0030] Step 2. On the basis of step 1, this embodiment adopts numerical simulation method...

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Abstract

The invention relates to a biomimetic processing method for a leading edge of a blade at an end area, which belongs to the field of energy and power. In the method, bionics is combined with principles of controlling a horseshoe vortex, inhibiting the development of a boundary layer and reducing loss; and the characteristics that marine animals (such as dolphins, whales and the like) with streamlined bodies, particularly a streamlined head of a dolphin can effectively reduce resistance and the loss during advancement are applied to the leading edge processing of the blade of turbine machinery, namely, a dolphin head sharp area-shaped structure is formed at the leading edge of an end wall area so as to obtain a low-loss and high-performance blade; therefore, aerodynamic performance of a turbine is effectively improved, and the overall efficiency is improved. The biomimetic processing method not only can be widely used for turbines in the field of energy and power of aviation, aerospace, navigation and industries, and is also suitable for a confluence area of two flowing hard walls.

Description

technical field [0001] The invention relates to a bionic treatment method for the leading edge of a blade in an end region, belonging to the field of energy and power. Background technique [0002] With the development of turbomachinery towards high load and high efficiency, the secondary flow loss accounts for an increasing proportion of the total loss of the blade passage, and it has attracted much attention because of its strong dependence on the geometry of the cascade. Various secondary flow control technologies have also developed rapidly, among which the leading edge modification technology in the end wall area of ​​the blade has received relatively large attention in recent years. The blade leading edge modification technology changes and controls the development of the horseshoe vortex at the leading edge by changing the shape of the blade leading edge in the end wall area, and then affects the development of the secondary flow. Some studies have been carried out ab...

Claims

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Application Information

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IPC IPC(8): F04D29/38
Inventor 刘艳明季路成孙拓
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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