Parametric modelling of unsteady load for turbine cascade and its application in clocking effect optimization and load-reduction

Haibo Wei; Zhifu Cao; Teng LiJun FanCe ChenJianyao Yao

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Parametric modelling of unsteady load for turbine cascade and its application in clocking effect optimization and load-reduction

机译：Parametric modelling of unsteady load for turbine cascade and its application in clocking effect optimization and load-reduction

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摘要

The circumferential phase differences of adjacent stators or rotors will lead to different unsteady aerodynamic loads of turbine (i.e., the clocking effect), which makes the modelling of unsteady load and clocking effect very complex, so an accurate and efficient modelling method for its optimization becomes essential. In this paper, a new modelling method for the unsteady aerodynamic load of turbine cascades is proposed based on the reduced-order model (ROM) and parametric training and applied to optimizing the clocking effect of a 2-stage low-pressure turbine cascade. Firstly, using the sub-block method, snapshot matrices that include the unsteady aerodynamic load on stator/rotor surfaces in different clocking positions are established, and the ROM of aerodynamic load in different clocking positions is presented based on the proper orthogonal decomposition (POD) method. Secondly, the POD coefficient matrices and the basis matrices are reconstructed based on the parametric Gaussian process regression (PGPR). The PGPR surrogate models between clocking positions and aerodynamic load are obtained. Finally, based on the established model, an efficient method is proposed for the clocking effect optimization and the aerodynamic load-reduction of a 2-stage cascade. Results show that the maximum optimization ranges for the variation altitude of unsteady aerodynamic lift and torque are 44.06 and 30.51, respectively, which verifies the efficiency and feasibility of the proposed theories and methods.

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来源
《Aerospace science and technology》 |2022年第8期|107669.1-107669.17|共17页
作者
Haibo Wei; Zhifu Cao; Teng LiJun FanCe ChenJianyao Yao;
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作者单位

College of Aerospace Engineering, Chongqing University, Chongqing. 400044, China;

Research Institute of Aero-Engine, Beihang University, Beijing, 100191 China;

Army Aviation Institute, Beijing, 101121, ChinaCollege of Aerospace Engineering, Chongqing University, Chongqing. 400044, China,Chongqing Key Laboratory of Heterogeneous Material Mechanics, Chongqing, 400044, China;

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收录信息美国《科学引文索引》(SCI);美国《工程索引》(EI);
原文格式 PDF
正文语种英语
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关键词
POD reduced-order method; Clocking effect; Parametric modelling; Turbine; Aerodynamic load-reduction;

Parametric modelling of unsteady load for turbine cascade and its application in clocking effect optimization and load-reduction

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