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Aerofoil blade of ridged surface drag reduction

An airfoil blade, ridged technology, applied in the field of drag reduction and energy saving of pumps and fans, can solve the problems of affecting the stable operation of pumps and fans, rough processing technology, and large influence of fluid viscosity, so as to reduce shear stress. , the effect of reducing energy consumption and reducing viscous resistance

Inactive Publication Date: 2016-02-10
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

Traditional pump and fan blades have rough processing technology and simple structure, and are greatly affected by fluid viscosity during mechanical work, which even affects the stable operation of pumps and fans.

Method used

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  • Aerofoil blade of ridged surface drag reduction
  • Aerofoil blade of ridged surface drag reduction
  • Aerofoil blade of ridged surface drag reduction

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Embodiment Construction

[0021] The present invention will be further described below in conjunction with accompanying drawing and specific embodiment

[0022] like Figure 1 to Figure 7 , an airfoil blade with a ridged surface drag reduction. A "V-shaped" ridge structure 3 is arranged on the surface of the blade 2. The direction of the grooves of the ridge structure 3 is perpendicular to the moving direction 1 of the fluid relative to the blade. The groove size characteristics Determined by the groove depth h, groove width s and groove spacing a, since this drag reduction technology is only applicable to the turbulent flow state, the ridge structure needs to be arranged on the middle and rear of the blade on the blade surface, that is, when the fluid flows around the blade to achieve turbulence. fully developed part of the flow. At the same time, in order to make the arrangement of the ridge structure better adapt to the streamline shape of the blade itself and not have a great impact on the aerodyn...

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Abstract

The invention relates to an aerofoil blade of ridged surface drag reduction. The aerofoil blade of ridged surface drag reduction is used for reducing flow resistance and energy loss in operation of a pump and a draught fan, particularly, V-shaped ridged structures are arranged on the surface of the aerofoil blade, relative distance sizes among the ridged structures are set to be a, h and s, when airflow flows through a blade passage, stable secondary vortexes are formed in ridged structure gullies, and viscous resistance can be obviously reduced. According to the aerofoil blade of ridged surface drag reduction, resistance between the blade and the airflow is reduced, and the aerofoil blade of ridged surface drag reduction has the advantage of reducing the energy consumption.

Description

technical field [0001] The invention belongs to the field of drag reduction, efficiency enhancement and energy saving of pumps and fans, and specifically refers to a blade with a non-smooth ridge structure surface to achieve drag reduction and energy saving effects. Background technique [0002] Pumps and fan fluid machinery, while occupying an important position in national production and life, also consume a large amount of energy. For example, the boiler feeder and induced draft fan are important auxiliary equipment of the power plant, and their power consumption accounts for about 30% of the plant's power consumption. For rotating fluid machines such as pumps and fans, friction due to fluid viscosity has an important impact on their performance. When the airflow flows through the blade flow channel, the thickness of the boundary layer formed on the blade surface due to the viscosity is small, but the effective cross-sectional area of ​​the impeller flow channel is reduc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04D29/18F04D29/26
Inventor 吴正人郝晓飞李子骏戎瑞
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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