LDV Measurements and Investigation of Flow Field Through Radial Turbine Guide Vanes

Eroğlu, Hasan; Tabakoff, W.

doi:10.1115/89-gt-162

Cited by 9 publications

(8 citation statements)

References 16 publications

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“…The scroll is followed by 18 slightly cambered guide vanes and then a vaneless space of 0.13" (3.3 mm) downstream of these vanes. The details of the geometry of the inlet guide vane can be found in references [Eroglu et al (1989) and Pasin et al (1992a)]. The rotor has an inlet radius of 3.22" (81.8mm).…”

Section: Experimental Radial Turbinementioning

confidence: 99%

“…Malak et al (1986) measured the detailed flow field with LDV in a rectangular cross-section scroll and observed only one vortex in this unsymmetric scroll geometry. Eroglu and Tabakoff (1989) investigated the flow field in the nozzle guide vane using LDV. Lakshiminarasimha et al (1989a) reported the flow measurements in the vaneless free vortex region using LDV.…”

mentioning

confidence: 99%

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Flow Field Investigation in the Exit Region of a Radial Inflow Turbine Using LDV

Murugan

Tabakoff

Hamed

1994

Volume 1: Turbomachinery

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Detailed flow investigation in the downstream region of a radial inflow turbine has been performed using a three component Laser Doppler Velocimetry. The flow velocities are measured in the exit region of the turbine at off-design operating conditions. The results are presented as contour and vector plots of mean velocities, flow angles and turbulent stresses. The measured parameters are correlated to the rotor blade rotation to observe any periodic nature of the flow. The measurements reveal a complex flow pattern near the tip region at the rotor exit due to the interaction of the tip clearance flow. The degree of swirl of the flow near the tip region at the rotor exit is observed to be high due to the gross under turning of the flow near the tip region. The effect of the rotor on the exit flow field is observed in the proximity of the rotor exit.

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Section: Experimental Radial Turbinementioning

confidence: 99%

mentioning

confidence: 99%

Flow Field Investigation in the Exit Region of a Radial Inflow Turbine Using LDV

Murugan

Tabakoff

Hamed

1994

Volume 1: Turbomachinery

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“…The rotor was not used during the present tests, but instead, an aluminum body of revolution was installed to provide a smooth, continuous flow path downstream of the nozzle. The rotor will also be included in the future measurements of this experimental program, and the effect of rotor on the nozzle flow field will be investigated by comparing the future results with the results of this paper and references [8], [9].…”

Section: Rotormentioning

confidence: 99%

“…They found a nonuniform velocity distribution in the vortex region, however, this nonuniformity decreased rapidly in the downstream direction indicating a rapid mixing zone. Eroglu and Tabakoff [9] reported the results of LDV measurements of the detailed flow field through the guide vanes of a radial inflow turbine. The mean flow field and turbulence intensities were presented.…”

Section: Introductionmentioning

confidence: 99%

LDV Measurements of Turbulent Stresses in Radial Turbine Guide Vanes

Eroğlu

Tabakoff

1990

Volume 1: Turbomachinery

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The results of Laser Doppler Velocimetry (LDV) measurements, in particular, turbulent stresses in radial turbine guide vanes are presented in this paper, in order to provide experimental data for the numerical predictions. The flow velocities were measured at upstream, inside and downstream of the guide vanes for two different mass flow rates (0.2 lb/s “0.0907 kg/s” and 0.3 lb/s “0.1361 kg/s”) using a two-component LDV system. The results are presented as contour plots of turbulent stresses. The LDV system consists of a 5 watt argon-ion laser, the seeding particle atomizer, the optical and the data acquisition systems. The optical components were arranged in the backward scatter mode to measure two orthogonal velocity components simultaneously. Frequency shifts were used on both components to determine the flow direction. The results indicate a significant transport of higher turbulence fluid into the suction surface-end wall corner by the end wall cross flows inside the passage. High turbulent stress gradients show that there is considerable flow mixing downstream of the flow passages. Turbulence was found to be locally anisotropic everywhere.

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“…As part of an on-going research program on radial inflow turbine at the University of Cincinnati, Malak et al [1986] measured the detailed flow field in the scroll cross-sections of a radial turbine using LDV system. Eroglu and Tabakoff [1989] investigated the flow field in the nozzle guide vane and Lakshminarasimha et al [1989] reported the flow measurements in the vaneless free vortex region. All these investigations were performed without the rotor, which was replaced by an aluminum body of revolution.…”

Section: Introductionmentioning

confidence: 99%

Flow Measurements and Flow Analysis in the ExitRegion of a Radial Turbine

Murugan¹,

Tabakoff²,

Hamed³

1996

International Journal of Rotating Machinery

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Three-dimensional flow measurements using LDV system were obtained in the exit region of a radial inflow turbine at an off-design operating condition. The measurements reveal a complex flow pattern near the tip region at the rotor exit due to the interaction of the tip clearance flow. The effect of the rotor on the exit flow field is observed in the proximity of the rotor exit. Steady axisymmetric, compressible, turbulent flow computations with a two equation turbulence model were performed using the PARC code for the meridional flow in the radial turbine exit region. The computational results obtained in the meridional plane are compared with the experimental results, which are correlated to the rotor blade rotation in the exit region of the radial turbine.A version of this paper was presented at the 30th AIAA/ASME/SAE/ASEE Joint Propulsion Conference, Indianapolis, Indiana, Paper no. AIAA-94-3075.

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LDV Measurements and Investigation of Flow Field Through Radial Turbine Guide Vanes

Cited by 9 publications

References 16 publications

Flow Field Investigation in the Exit Region of a Radial Inflow Turbine Using LDV

Flow Field Investigation in the Exit Region of a Radial Inflow Turbine Using LDV

LDV Measurements of Turbulent Stresses in Radial Turbine Guide Vanes

Flow Measurements and Flow Analysis in the ExitRegion of a Radial Turbine

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