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Article

Mechanisms of Geometric Parameter Influence on Fast Transient Response Process of the Flow Path Under Inertial Forces

1
Research Institute of Aero-Engine, Shahe Campus, Beihang University, Beijing 102206, China
2
Civil Aviation University of China, Tianjin 300300, China
*
Author to whom correspondence should be addressed.
Appl. Sci. 2025, 15(13), 7320; https://doi.org/10.3390/app15137320 (registering DOI)
Submission received: 22 May 2025 / Revised: 22 June 2025 / Accepted: 27 June 2025 / Published: 29 June 2025
(This article belongs to the Special Issue Advances in Fluid Mechanics Analysis)

Featured Application

The main application direction of this study is the research related to aircraft engine shaft faults. It can improve the prediction accuracy of axial load evolution after aircraft engine shaft faults and further provide a basis for the passive safety design for shaft faults.

Abstract

This study investigates the evolution of axial loads in the secondary air system following shaft failure in aeroengines. It addresses a significant gap in the existing literature regarding the effects of inertial forces within the cavity, as well as the unclear mechanisms by which the geometric parameters of the flow path influence these forces. A combined approach of three-dimensional simulation and experimental validation is utilized to propose a method for analyzing the evolution of axial loads during the fast transient response process, based on changes in the Cavity Inertial Force Dominant Zone (CIDZ). The research examines both single cavities and cavity–tube combination flow paths to explore the impact of inertial forces on the axial load response process and, subsequently, the influence of flow path geometric parameters on this response. The results demonstrate that inertial forces within the cavity and the geometric parameters of the flow path significantly affect the axial load response process by influencing the intensity, phase, and minor oscillation amplitude of the axial load response at various end faces within the cavity. The variation in a single geometric parameter in this study resulted in a maximum impact exceeding 500% on the differences in axial loads at different end faces within the cavity. The study offers theoretical support for the load response analysis of the secondary air system in the context of shaft failure, serving as a foundation for safety design related to this failure mode.
Keywords: shaft failure; air system; fast transient response; inertial force; axial load; flow path geometric parameters shaft failure; air system; fast transient response; inertial force; axial load; flow path geometric parameters

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MDPI and ACS Style

Zuo, K.; Ding, S.; Liu, P.; Qiu, T.; Wang, J.; Li, Z.; Liu, C. Mechanisms of Geometric Parameter Influence on Fast Transient Response Process of the Flow Path Under Inertial Forces. Appl. Sci. 2025, 15, 7320. https://doi.org/10.3390/app15137320

AMA Style

Zuo K, Ding S, Liu P, Qiu T, Wang J, Li Z, Liu C. Mechanisms of Geometric Parameter Influence on Fast Transient Response Process of the Flow Path Under Inertial Forces. Applied Sciences. 2025; 15(13):7320. https://doi.org/10.3390/app15137320

Chicago/Turabian Style

Zuo, Kang, Shuiting Ding, Peng Liu, Tian Qiu, Jiajun Wang, Zijun Li, and Chuankai Liu. 2025. "Mechanisms of Geometric Parameter Influence on Fast Transient Response Process of the Flow Path Under Inertial Forces" Applied Sciences 15, no. 13: 7320. https://doi.org/10.3390/app15137320

APA Style

Zuo, K., Ding, S., Liu, P., Qiu, T., Wang, J., Li, Z., & Liu, C. (2025). Mechanisms of Geometric Parameter Influence on Fast Transient Response Process of the Flow Path Under Inertial Forces. Applied Sciences, 15(13), 7320. https://doi.org/10.3390/app15137320

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