Next Article in Journal
A Casing Treatment with Axial Grooves for Centrifugal Compressors
Previous Article in Journal
Quasi 3D Nacelle Design to Simulate Crosswind Flows: Merits and Challenges
Open AccessArticle

Characterization of Periodic Incoming Wakes in a Low-Pressure Turbine Cascade Test Section by Means of a Fast-Response Single Sensor Virtual Three-Hole Probe

von Karman Institute for Fluid Dynamics, Chaussée de Waterloo 72, 1640 Sint-Genesius-Rode, Belgium
*
Author to whom correspondence should be addressed.
Int. J. Turbomach. Propuls. Power 2019, 4(3), 26; https://doi.org/10.3390/ijtpp4030026
Received: 1 July 2019 / Revised: 5 August 2019 / Accepted: 7 August 2019 / Published: 15 August 2019
This paper aims at evaluating the characteristics of the wakes periodically shed by the rotating bars of a spoked-wheel type wake generator installed upstream of a high-speed low Reynolds linear low-pressure turbine blade cascade. Due to the very high bar passing frequency obtained with the rotating wake generator (fbar = 2.4−5.6 kHz), a fast-response pressure probe equipped with a single 350 mbar absolute Kulite sensor has been used. In order to measure the inlet flow angle fluctuations, an angular aerodynamic calibration of the probe allowed the use of the virtual three-hole mode; additionally, yielding yaw corrected periodic total pressure, static pressure and Mach number fluctuations. The results are presented for four bar passing frequencies (fbar = 2.4/3.2/4.6/5.6 kHz), each tested at three isentropic inlet Mach numbers M1,is = 0.26/0.34/0.41 and for Reynolds numbers varying between Re1,is = 40,000 and 58,000, thus covering a wide range of engine representative flow coefficients (ϕ = 0.44−1.60). The measured wake characteristics show fairly good agreement with the theory of fixed cylinders in a cross-flow and the evaluated total pressure losses and flow angle variations generated by the rotating bars show fairly good agreement with theoretical results obtained from a control volume analysis. View Full-Text
Keywords: virtual three-hole probe; low-pressure turbine; periodic incoming wakes; periodic wake generator; unsteady rotor–stator interactions virtual three-hole probe; low-pressure turbine; periodic incoming wakes; periodic wake generator; unsteady rotor–stator interactions
Show Figures

Figure 1

MDPI and ACS Style

Clinckemaillie, J.; Arts, T. Characterization of Periodic Incoming Wakes in a Low-Pressure Turbine Cascade Test Section by Means of a Fast-Response Single Sensor Virtual Three-Hole Probe. Int. J. Turbomach. Propuls. Power 2019, 4, 26.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Back to TopTop