Research Papers

Algorithm to Construct Line-Shaped Feature Point Clouds of Single-Value Ruled Blades for Gas Turbines

[+] Author and Article Information
Yu Zhou

School of Transportation Science
and Engineering,
Beihang University,
Beijing 100191, China
e-mail: zy0741@sina.com

Hao-chen Wang

School of Transportation Science
and Engineering,
Beihang University,
Beijing 100191, China
e-mail: chichi123137@126.com

Fa-rong Du

School of Energy and Power Engineering,
Beihang University,
Beijing 100191, China
e-mail: dfr@buaa.edu.cn

Shui-ting Ding

School of Energy and Power Engineering,
Beihang University,
Beijing 100191, China
e-mail: dst@buaa.edu.cn

1Corresponding author.

Contributed by the Manufacturing Engineering Division of ASME for publication in the JOURNAL OF MANUFACTURING SCIENCE AND ENGINEERING. Manuscript received July 31, 2013; final manuscript received May 13, 2014; published online June 24, 2014. Assoc. Editor: Xiaoping Qian.

J. Manuf. Sci. Eng 136(4), 041022 (Jun 24, 2014) (6 pages) Paper No: MANU-13-1327; doi: 10.1115/1.4027719 History: Received July 31, 2013; Revised May 13, 2014

Using the geometric features of surfaces, we proposed an algorithm to construct line-shaped feature point clouds for the reverse design of a blade surface. Blade surfaces in the gas turbines field require high accuracy and have complex shapes. By quickly recognizing the border of the scattered point clouds of blades, the back-project method was used to extract the ruled generatrix vector. By solving the multi-objective optimization problem of border point clouds, the annealing algorithm was applied to match border point clouds nonrigidly. Equally divided points were constructed based on the point clouds registration results to get inerratic-orderly line-shaped feature point clouds that are beneficial for generating high quality blade surfaces quickly. The proposed algorithm is very effective for dealing with the point clouds of single-value ruled blades. It is also theoretically significant and may be applied for reconstructing the surface of point clouds of single-value ruled blade surfaces. Experiments verify the feasibility of the proposed algorithm.

Copyright © 2014 by ASME
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Fig. 1

Feature boundary of the blade surface

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Fig. 2

Blade boundary and ruled generatrix

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Fig. 3

The geometry model of ruled generatrix extraction

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Fig. 4

Skin surface based on equally divided linear point cloud

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Fig. 5

Turbine blade and compressor blade calculation results in different stages of the algorithm: (a) measure data of turbine blade, (b) extracted boundary point cloud of turbine blade, (c) extracted straight generatrix vectors of turbine blade, (d) equally divided LPC of turbine blade, (e) reverse design results of the turbine, (f) measure data of compressor wheel blade, (g) extracted boundary point cloud of compressor wheel blade, (h) extracted straight generatrix vectors of compressor wheel blade, (i) equally divided LPC of compressor wheel blade, (j) reverse design results of the compressor wheel, (k) 3D model based on triangulation, (l) result of coincidence degree based on point cloud and presented algorithm



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