Analysis on Reduced Order of Unsteady Flow Fields for a Vaneless Diffuser Based on Visualized Autoencoder

HUANG Kexin; WU Ying; ZHU Xiaocheng

doi:10.19805/j.cnki.jcspe.2026.250025

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Analysis on Reduced Order of Unsteady Flow Fields for a Vaneless Diffuser Based on Visualized Autoencoder

更新时间：2026-10-10

- Analysis on Reduced Order of Unsteady Flow Fields for a Vaneless Diffuser Based on Visualized Autoencoder
- Chinese Journal of Power Engineering Vol. 46, Issue 5, Pages: 90-96(2026)
- 作者机构：
- 作者简介：
- 基金信息：
- DOI：10.19805/j.cnki.jcspe.2026.250025
  CLC： TH452
- Published：2026
- 稿件说明：
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黄可心, 吴颖, 竺晓程. 基于可视化自编码器的无叶扩压器失稳流场降阶分析[J]. 动力工程学报, 2026, 46(5): 90-96.
黄可心, 吴颖, 竺晓程. 基于可视化自编码器的无叶扩压器失稳流场降阶分析[J]. 动力工程学报, 2026, 46(5): 90-96. DOI： 10.19805/j.cnki.jcspe.2026.250025.

DOI： 10.19805/j.cnki.jcspe.2026.250025

摘要

流场降阶技术已开始应用到复杂流场的分析中

以自编码器技术为基础

分别采用通道分解自编码器和分层自编码器技术

实现离心压气机无叶扩压器非稳定流场的降阶和流动特征提取

并与常规本征正交分解(POD)得到的流场模态进行对比。结果表明:通道分解自编码器和分层自编码器技术解决了常规自编码方法无法进行降阶流场可视化的问题

直观地给出了无叶扩压器非稳定流场的演化过程

为非稳定流场分析提供了新的工具。

Abstract

Reduced-order technology has been applied to the analysis on complex flow fields. Based on a fully connected autoencoder network

a multi-channel autoencoder and a hierarchical autoencoder were designed to achieve reduced-order modeling and flow feature extraction of unsteady flow fields in a vaneless diffuser of the centrifugal compressor. Then the results were compared with the flow field modes obtained via conventional proper orthogonal decomposition (POD). Results show that the multi-channel decomposition autoencoder and hierarchical autoencoder techniques address the issue of conventional autoencoder methods being unable to perform reduced-order flow field visualization

providing an intuitive representation of the evolution process of unstable flow fields in the vaneless diffuser and offering a new tool for analyzing unsteady flow fields.

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references

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