Wakes and Secondary Structures Past Stator Wheel in Test Turbine Vt-400 Observed by Piv

Duda, Daniel; Klimko, Marek; Milčák, Petr; Tomášková, Tetjana; Uruba, Václav; Yanovych, Vitalii; Žitek, Pavel

doi:10.2139/ssrn.4626373

Cited by 1 publication

(2 citation statements)

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“…The illumination lasersheet has to be reflected by a mirror placed inside the turbine but above the wheels, therefore we hope, that it does not affect the flow field. For other details about the camera, laser, particle seeding, etc., we refer our previous work (Duda et al, 2024), which is published in "open-access" mode.…”

Section: Methodsmentioning

confidence: 99%

“…In the past, the flow inside turbines has been explored mainly numerically (Denton and Pullan, 2012;Sieverding and Manna, 2020) or by using pressure measurements (Klimko and Okresa, 2016;Ilieva, 2017;Klimko et al, 2021;Porreca et al, 2007). Our recent work uses Particle Image Velocimetry to map flow in some selected planar area past the rotor (Duda et al, 2021) or stator wheel (Duda et al, 2024). Very interesting apparatus exists at Baltimore university: their experimental configuration uses turbines made of transparent materials (Chow et al, 2002;Uzol et al, 2002).…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

PIV Measurement of Wakes Past Stator Wheel Inside Air Test Turbine VT-400 in Two Axial×Tangential Planes

Duda,

Uruba,

Yanovych

et al. 2024

Engineering Mechanics

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VT-400 is a single-stage test turbine working with ambient air located at the University of West Bohemia in Pilsen. Inside this turbine, we perform a PIV (Particle Image Velocimetry) measurement of the flow field in two planes oriented in axial × tangential direction. There planes are located between the stator wheel and rotor wheel; first one is near the hub, second one at the middle of blade height. The spatial distribution of velocity fluctuations displays system of wakes and jets oriented diagonally over the studied area. The jets are represented by higher mean velocity and lower turbulence, the wakes oppositely. The spatial size of fluctuations is analyzed in terms of autocorrelation function: the size of correlated region is comparable with the wake width, additionally, there is apparent a wave in the stream-wise direction. At different turbine working parameters, we observed at least two distinct wavelengths. The neighboring wakes do not interact in the limits of studied areas.

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Section: Methodsmentioning

confidence: 99%