Uncertainty Quantification of Fluid-Solid Interaction of Centrifugal Compressor Impeller in Whole Machine Environment

XU Yongxiang; SONG Jiatao; ZHANG Benrui; LI Zhen; JU Yaping; ZHANG Chuhua

doi:10.7652/xjtuxb202410011

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Uncertainty Quantification of Fluid-Solid Interaction of Centrifugal Compressor Impeller in Whole Machine Environment

更新时间：2025-07-28

- Uncertainty Quantification of Fluid-Solid Interaction of Centrifugal Compressor Impeller in Whole Machine Environment
- Vol. 58, Issue 10, Pages: 121-132(2024)
- 作者机构：
  
  1. 西安交通大学能源与动力工程学院,西安,710049
  2. 比亚迪汽车工业有限公司,广东,深圳,518118
- 作者简介：
- 基金信息：
- DOI：10.7652/xjtuxb202410011
  CLC： TK14
- Online First：10 October 2024，
  
  Published：2024
- 稿件说明：
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XU Yongxiang, SONG Jiatao, ZHANG Benrui, et al. Uncertainty Quantification of Fluid-Solid Interaction of Centrifugal Compressor Impeller in Whole Machine Environment[J]. 2024, 58(10): 121-132.
DOI：

XU Yongxiang, SONG Jiatao, ZHANG Benrui, et al. Uncertainty Quantification of Fluid-Solid Interaction of Centrifugal Compressor Impeller in Whole Machine Environment[J]. 2024, 58(10): 121-132. DOI： 10.7652/xjtuxb202410011.

摘要

针对流固耦合不确定性量化计算中精度和成本难以有效平衡的问题

从某涡轮增压器离心压气机双向流固耦合计算出发

提出了考虑叶片热态变形和蜗壳非对称影响的离心压气机内流场计算简化模型

并结合集成代理模型和蒙特卡罗方法

开展了整机环境下离心压气机叶轮流固耦合的不确定性量化分析。数值结果表明:在保证计算精度的前提下

相较于整机流固耦合模型

提出的简化模型将计算时间缩短了83%～98%; 材料属性不确定性对叶轮效率的影响大于转速不确定性

密度、泊松比和弹性模量3种不确定性因素对叶轮效率的影响程度相当

转速对叶片热态变形不确定性的影响程度在转速不确定性中最为显著; 叶片热态变形不确定性对叶轮效率的影响主要体现在效率均值的变化

而与热态变形无关的转速自身、叶轮出口非对称流场等不确定性因素对叶轮效率的影响主要体现在分散度的变化。研究工作突显了流固耦合分析在离心压气机不确定性量化分析中的必要性

为今后开展鲁棒优化设计提供了理论基础。

Abstract

To balance the computational accuracy and cost in uncertainty quantification of fluid-solid interaction

a simplified numerical model for the internal flow field of centrifugal compressors is proposed based on two-way fluid-solid interaction of a turbocharger centrifugal compressor and with the hot deformation of blades and the asymmetric effect of volute taken into account. Combined with integrated surrogate models and Monte Carlo method

uncertainty quantification of fluid-solid interaction of centrifugal compressor impeller is carried out in whole machine environment. The results show the simplified model proposed can reduce the computational time by 83% to 98% compared with the fluid-solid interaction model of whole machine while the computational accuracy remains. The impact of material property uncertainty on impeller efficiency is greater than that of rotational speed uncertainty. Three uncertainty factors of density

Poisson's ratio and elastic modulus yielded equivalent impacts on impeller efficiency. Among the rotational speed uncertainties

the induced hot deformation of blades had the most significant impact. The impact of hot deformation of blades on impeller efficiency is mainly reflected in terms of mean value

while uncertainty factors unrelated to hot deformation

such as rotational speed itself and asymmetric flow field at the impeller outlet

mainly affected impeller efficiency in terms of scatter

with the former being the main factor affecting impeller efficiency variation. This study highlights the necessity of fluid-solid interaction in uncertainty quantification of centrifugal compressors and lays a theoretical foundation for robust design optimization of centrifugal compressors.

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