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Multichannel circumferential sine distribution sample implementation method for blade having installation angle error

A technology of sinusoidal distribution and installation angle, which is applied in the field of realization of multi-channel circumferential sinusoidal distribution samples, can solve the problems of compressor blade installation angle error, compressor aerodynamic performance degradation, geometric design parameter error, etc., to reduce the installation angle In the case of a large gradient change in the error, the effect of reducing the degree of deterioration and consistent design status

Active Publication Date: 2018-08-10
SHANGHAI JIAO TONG UNIV
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Problems solved by technology

However, due to the complexity of blade processing, the geometry obtained by actual processing is very easy to deviate from the design parameters and cause errors, especially the installation angle error of the compressor blade
A large number of installed angle error blades will lead to a sharp drop in the aerodynamic performance of the compressor, especially a drastic reduction in the surge margin
[0003] In actual processing, by narrowing the specified tolerance range as much as possible, the size of the machining error of the blade can be effectively reduced, thereby reducing the performance loss, but this method will lead to a significant increase in processing costs

Method used

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  • Multichannel circumferential sine distribution sample implementation method for blade having installation angle error
  • Multichannel circumferential sine distribution sample implementation method for blade having installation angle error
  • Multichannel circumferential sine distribution sample implementation method for blade having installation angle error

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Experimental program
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Embodiment Construction

[0019] like figure 1 As shown, this embodiment specifically includes the following steps:

[0020] Step 1. Blade installation angle tolerance range and PDF selection

[0021] 1.1 First of all, for this compressor blade, the tolerance range of its installation angle is selected as [-1.5°, +1.5°].

[0022] 1.2 Under the selected tolerance range, establish a reasonable Gaussian distribution probability density function, so that the geometric distribution satisfies: the farther away from the prototype, the lower the probability density, and the probability density is close to 0 when reaching the tolerance boundary, so this example In the probability density function of the Gaussian distribution, the standard deviation σ is taken as 0.5, then the function image is as follows image 3 shown.

[0023] Step 2. Random generation of installation angle errors

[0024] 2.1 Reasonably divide the tolerance range [-1.5°, +1.5°] to construct multiple small areas. In this example, it is di...

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Abstract

The invention relates to a multichannel circumferential sine distribution sample implementation method for a blade having an installation angle error, the installation angle error is randomly generated and a multi-channel simulation sample is obtained by setting the tolerance range of the installation angle error of the blade and the Gaussian distribution probability density function, and a circumferential sine distribution sample is obtained after rearrangement. The sine curve and the circumferential variation trend of the installation angle error of the blade are combined to reduce the deterioration degree of the performance of a gas compressor caused by the installation angle error, and the processing cost of the blade of the gas compressor is controlled while the development requirement of the high performance of a turbo machine is met.

Description

technical field [0001] The invention relates to a technology in the field of turbomachinery, in particular to a method for realizing multi-channel circumferential sinusoidal distribution samples of blades with angular errors. Background technique [0002] In the axial-flow high-pressure compressor of an aero-engine, the blade is the part that realizes energy conversion, and it is also the part with the largest number and the most complicated processing. The processing quality of the blade plays a vital role in the efficiency and aerodynamic stability of the current high-load designed compressor role. However, due to the complexity of blade processing, the geometry obtained by actual processing is very easy to deviate from the design parameters and produce errors, especially the installation angle error of the compressor blade. A large number of installed angle error blades will lead to a sharp decline in the aerodynamic performance of the compressor, especially a drastic re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F30/17
Inventor 郑似玉滕金芳羌晓青
Owner SHANGHAI JIAO TONG UNIV
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