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Aerodynamic optimization method of radial turbine based on data dimensionality reduction and multiple two-dimensional flow surfaces

A data dimensionality reduction, turbo-pneumatic technology, applied in special data processing applications, engine components, machines/engines, etc., can solve the problems of insufficient number of samples, many design variables, slow optimization process, etc., to reduce computing resources, reduce Calculation time, effect of significant engineering significance

Active Publication Date: 2020-11-10
XI AN JIAOTONG UNIV
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Problems solved by technology

However, due to the complex structure of the radial turbine blade itself, too many design variables are obtained when parameterizing the stator blade and rotor blade shape. Insufficient number of samples obtained, slow optimization process

Method used

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  • Aerodynamic optimization method of radial turbine based on data dimensionality reduction and multiple two-dimensional flow surfaces
  • Aerodynamic optimization method of radial turbine based on data dimensionality reduction and multiple two-dimensional flow surfaces
  • Aerodynamic optimization method of radial turbine based on data dimensionality reduction and multiple two-dimensional flow surfaces

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Embodiment Construction

[0033] The present invention will be further described below in conjunction with accompanying drawing.

[0034] refer to figure 1 , the present invention is based on data dimension reduction and multiple two-dimensional flow surface radial flow turbine aerodynamic optimization method, comprising the following steps:

[0035]1. Determine the design variables required for the optimization of the stator blade shape, perform data dimension reduction on the design variables, complete parametric modeling, and finally form a one-dimensional design variable matrix x s =(x 1 ,x 2 ,...,x s ).

[0036] Take the diffuser blade shape of a centrifugal compressor as an example, such as figure 2 , since the vane is usually a straight blade, the dimensionality reduction of the vane only needs to select a section of the vane arbitrarily, and the axial coordinate Z remains unchanged at this time. At this point the leading edge segment (10% chord length) is 0-y 1 , leaf body section (80% ...

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Abstract

The invention discloses a radial-flow turbine pneumatic optimization method based on multiple two-dimensional flow surfaces and data dimension reduction. The method comprises the steps: 1, selecting astationary blade design variable, and carrying out the parametric modeling based on the data dimension reduction; 2, performing parametric modeling on the rotor blade design variables after dimensionreduction, and randomly generating a design variable matrix by combining the stator blade design variables; 3, adopting a multi-two-dimensional flow surface calculation method to obtain optimizationvariable isentropic efficiency; 4, performing multi-generation crossover variation on the initial population by adopting a genetic algorithm to obtain a convergence solution; and 5, selecting 5% of individuals with the highest isentropic efficiency in the optimization process, performing calculating by adopting three-dimensional CFD to obtain an accurate solution, and obtaining an optimal design variable. The optimization method has the advantages of being low in data dimension, high in convergence speed and capable of saving computing resources and time, and has important engineering significance and wide application prospects.

Description

technical field [0001] The invention belongs to the technical field of radial flow turbine machinery, and in particular relates to an aerodynamic optimization method for a radial flow turbine based on data dimension reduction and multiple two-dimensional flow surfaces. Background technique [0002] Radial turbomachinery includes centripetal turbines and centrifugal compressors, which have the advantages of small size, light weight, long life, simple structure, convenient operation and maintenance, and low cost. Especially for design conditions with small flow rates, the efficiency of radial turbomachinery is higher. With the development of engineering technology, radial turbomachinery has been widely used in recent years, such as medium and small power gas turbine devices and turbochargers for diesel engines. [0003] The design variables of radial turbomachinery usually include the profile of the stator blade, namely the turbine nozzle and compressor diffuser, the rotor bl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/17G06K9/62F01D9/02F01D5/14
CPCF01D5/141F01D9/02G06F30/17
Inventor 张荻王雨琦李云珠谢永慧
Owner XI AN JIAOTONG UNIV
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