Zhaoqi Yan

Physical mechanisms of compressor flow instability driven by transient state

Tianyu Pan, Hui Zhao, Zhaoqi Yan, Qi Li

The new generation of aircraft engines integrate numerous adjustable mechanisms that induce large-scale transient variations in aerothermal cycles, which significantly affect compressor flow stability. This study focuses on the fluid dynamic mechanisms underlying compressor flow instability during transient operation, using asymmetric inlet …

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Dynamic Changes of Longitudinal Arch Work Are Related to Energy Expenditure During Long-Distance Running

Kexin Zhang, Zhaoqi Yan, Yijie Duan, Yan Xu et autres

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An improved body force model to simulate engine/airframe integration with boundary layer ingesting inflow distortion

Ling Li, Wei Yuan, Zhaoqi Yan, Tianyu Pan

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Prediction of subsonic cascade flow fields by physics-informed graph neural networks with unbalanced data

Yunyang Feng, Wei Yuan, Xizhen Song, Zhaoqi Yan et autres

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Turbulence-induced disturbances and their evolution to stall onset in a compressor cascade using large eddy simulation

Tianyu Pan, Teng Li, Zhaoqi Yan, Qiushi Li

This study investigates the turbulence-induced disturbances and stall precursor triggering mechanism in NACA65-18(10) cascade based on large eddy simulations. The results indicate that the disturbances exist under various operating conditions along the performance curve. The shear layer is the physical structure responsible …

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Forced Vibration Induced by Dynamic Response Under Different Inlet Distortion Intensities

Tianyu Pan, Zhongcheng Mu, Zhaoqi Yan, Qiushi Li

Boundary layer ingestion propulsion systems have attracted much attention due to their significant potential to reduce the fuel consumption of future commercial aircraft. However, the aeroelastic stability of the fan blade is affected by the continuous non-uniform incoming flow induced by the …

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An improved wiener filter-based method for identifying stall inception of transonic compressor

Wei Yuan, Yuanhua Liu, Zhaoqi Yan, Tianyu Pan

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Experimental investigation of instability inception on a transonic compressor under various inlet guide vanes

Tianyu Pan, Jingsai ZHOU, Wenqian Wu, Zhaoqi Yan et autres

The utilization of Inlet Guide Vane (IGV) plays a key factor in affecting the instability evolution. Existing literature mainly focuses on the effect of IGV on instability inception that occurs in the rotor region. However, with the emergence of compressor instability starting …

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Adaptive Changes in Longitudinal Arch During Long-distance Running

Weiyan Ren, Yan Wang, Zhaoqi Yan, Zhaowei Chu et autres

Abstract This study investigates the biomechanical adaptations of the longitudinal arch (LA) in long-distance runners, focusing on changes in stiffness, angle, and moment during a 60-minute run. Twenty runners participated in this experiment, and were asked to run at a speed of …

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Frequency lock-in mechanism in the presence of blockage effects

Tianyu Pan, Teng Li, Chenghao Li, Zhaoqi Yan et autres

This study reveals the blockage effects on vortex shedding, the lock-in mechanism of a forced oscillating cylinder, and the coupling effects of blockage and oscillation. The wind tunnel experiments and large eddy simulations were conducted at a Reynolds number of 2000, encompassing …

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Effects of Re on blade load temporal-spatial distribution and correlation with flow stability of transonic compressor under inlet distortion

Zhiping Li, Xingyu Zhu, Zhaoqi Yan, Tianyu Pan

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Numerical Study on the Effects of Re on the Unsteady Behaviors in a Transonic Axial-Fan Under Inlet Distortion

Zhiping Li, Xingyu Zhu, Zhaoqi Yan, Tianyu Pan

Abstract The dynamic response of a compression system is the complex dynamic behaviors reacted by the compressor subject to non-uniform inflow excitation. However, in a real operating condition, the compressor would work at a wide range of altitudes within the flight envelope, …

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