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Parametric modeling method for film hole

A gas-film hole, parametric technology, applied in image data processing, electrical digital data processing, special data processing applications, etc., can solve the problems of poor cooling efficiency, large positioning error, etc., to enhance the cooling effect and reduce the positioning error. , The effect that meets the design requirements

Inactive Publication Date: 2015-05-06
NORTHWESTERN POLYTECHNICAL UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to propose a parametric modeling method for the air film hole in the existing technology, which is used for the center of the air film hole on the blade body. Positioning and arrangement on the free-form surface of the outer shape, associating the positioning of the air film hole with the free curve, and realizing the positioning of the center of the air film hole on the free-form surface of the outer shape of the blade body through the distribution method of equal arc length percentage and equal distance, reducing The positioning error of the gas film hole is reduced, the cooling effect is enhanced, and it is easy to modify parameters, which can meet the requirements of turbine blade modeling

Method used

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  • Parametric modeling method for film hole
  • Parametric modeling method for film hole
  • Parametric modeling method for film hole

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Embodiment Construction

[0048] Describe the present invention below in conjunction with specific embodiment:

[0049] This embodiment is a parametric modeling design process of air film holes in a certain leaf basin, using CAD software design environment as UG NX7.5 software.

[0050] The air film hole parametric modeling method in this embodiment associates the location of the air film hole center with the intersection line of the free-form surface of the blade body shape, and realizes that the air film hole center is on the blade body in the manner of equal arc length percentage and equal distance. Distribution on a shape free surface. byfigure 1 The shape of the blade body shown is taken as an example, and the specific steps are as follows:

[0051] Step 1: Establish a three-dimensional model of the blade, including the inner shape of the blade body and the outer shape of the blade body; the section line on each section of the blade body shape is composed of four curves: leading edge section line...

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Abstract

The invention provides a parametric modeling method for a film hole. The positioning for the film hole is associated with a blade exterior free-form curve surface intersection line; the accurate positioning of the center of the film hole on an exterior is realized in a equal arc length percentage and equal distant distribution manner; the design demand on turbine blade is met; the positioning error of the film hole on the exterior is reduced; the cooling effect is enhanced; the method is unlimited to a three-dimensional software platform; the method can be used for performing film hole parametric modeling on various software platforms.

Description

technical field [0001] The invention relates to the field of parametric modeling of gas film holes in turbine blades, in particular to a parametric modeling method for gas film holes, which is used for positioning and arranging the centers of gas film holes on the free curved surface of the blade body. Background technique [0002] The cooling of hollow turbine blades of aero-engines is an important part of the safe and effective operation of aero-engine turbines. The external cooling of turbine blades is film cooling, which mainly includes film cooling at the leading edge, film cooling at the blade basin and the back of the blades. Single row or multiple exhaust film cooling holes to achieve. The relevant information of constructing air film holes, such as: the positioning, arrangement, vector direction of the central axis of the air film hole on the outer surface, the interference check with the internal structure and the modifiability of the model are the key issues affec...

Claims

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Application Information

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IPC IPC(8): G06F17/50G06T17/00
Inventor 莫蓉赵碧霞张传佳王宁黄方林
Owner NORTHWESTERN POLYTECHNICAL UNIV