Application of Phase-Locked PIV Technique to the Measurements of Flow Field in a Turbine Stage

Zhang, Zhenyang; Ma, Hongwei

doi:10.1007/s11630-020-1215-4

Cited by 5 publications

(1 citation statement)

References 13 publications

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“…Flow visualization techniques have shown great advantages in aerodynamic studies with higher spatial resolution and lower disturbance to the flow field [1]. The fulfillment of flow visualization techniques, such as PIV [2,3], PSP [4,5], and SSLCC [6,7], usually requires excitation light providing sufficient illumination that covers the tested object, and a camera acquiring the particular visual phenomenon of the whole measurement target, and these are two vital optical components in the measurement system. Before the measurement begins, these two key components need to be located around the tested object, and different positioning will affect the measurement results to some extent.…”

Section: Introductionmentioning

confidence: 99%

Application of pre-positioning method in compressor cascade measurement with pressure-sensitive paint

Yang¹,

Gao²,

Gao³

et al. 2022

Meas. Sci. Technol.

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Pressure sensitive paint (PSP) technique have shown their superiorities in the capability of large coverage area and high spatial resolution. The process of PSP technique usually requires sufficient illumination that covers the entire test object and camera that acquires the particular excited fluorescence. Applications on internal flow study like compressor cascade may fail as the optical access is heavily limited due to the closely adjacent components, which puts forward a high demand for spatial positioning arrangement of optical devices in the visualization system. In this work, a pre-positioning method was proposed to help determine the arrangement of optical devices of internal flow PSP measurement system in advance. And it was applied to the measurement for a linear compressor cascade with large solidity. The results showed that with the optical layout arrangement determined using this pre-positioning method, a full-field pressure distribution of cascade blade can be acquired successfully.

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Section: Introductionmentioning

confidence: 99%

Application of pre-positioning method in compressor cascade measurement with pressure-sensitive paint

Yang¹,

Gao²,

Gao³

et al. 2022

Meas. Sci. Technol.

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Digital Particle Image Visualization of the Cooling Film Formation in a Flow Around the Leading Edge of a Vane in a Gas Turbine Engine

Veretennikov,

Evdokimov,

Kolesova

et al. 2024

Therm. Eng.

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Blade Twist Effects on Aerodynamic Performance and Noise Reduction in a Multirotor Propeller

Sun

Yonezawa

Tanabe

et al. 2023

Drones

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This paper presents a novel integrated study of the aerodynamic performance and acoustic signature of multirotor propellers with a specific focus on the blade twist angle effect. Experimental measurements and computational fluid dynamic (CFD) simulations were utilized to examine and compare the aerodynamic performance and noise reduction between twisted and untwisted blades. A 2D phase-locked particle image velocimetry (PIV) was employed to visualize flow structures at specific blade locations in terms of tip vortices and trailing edge vortices. Good consistency between the simulations and measurements was observed in aerodynamic and acoustic performance. It is verified that the propellers with twisted blades enable a maximum increase of 9.3% in the figure of merit compared to untwisted blades while achieving the same thrust production and are further capable to reduce overall sound pressure level by a maximum of 4.3 dB. CFD results reveal that the twisted propeller remarkedly reduces far-field loading noise by suppressing trailing-edge vortices, hence mitigating kinetic energy fluctuation at the blade tip, while having minimal impact on thickness noise. This study points to the crucial role of blade twists in altering the aeroacoustic characteristics, indicating that optimal designs could lead to significant improvements in both aerodynamic and acoustic performance.

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Application of Phase-Locked PIV Technique to the Measurements of Flow Field in a Turbine Stage

Cited by 5 publications

References 13 publications

Application of pre-positioning method in compressor cascade measurement with pressure-sensitive paint

Application of pre-positioning method in compressor cascade measurement with pressure-sensitive paint

Digital Particle Image Visualization of the Cooling Film Formation in a Flow Around the Leading Edge of a Vane in a Gas Turbine Engine

Blade Twist Effects on Aerodynamic Performance and Noise Reduction in a Multirotor Propeller

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