Journal ArticleDOI
The Fluid Dynamics of a Shrouded Disk System With a Radial Outflow of Coolant
F. J. Bayley,J. M. Owen +1 more
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In this article, an experimental study of an air-cooled gas turbine disk using the model of a disk rotating near a shrouded stator is presented. Measurements of pressure distribution, frictional moment, and cooling air flow necessary to prevent the ingress of hot gases over the turbine disk are described for a range of rotational speeds, mass flow rates, and different geometries.Abstract:
This paper describes an experimental study of an air-cooled gas turbine disk using the model of a disk rotating near a shrouded stator. Measurements of pressure distribution, frictional moment, and the cooling air flow necessary to prevent the ingress of hot gases over the turbine disk are described for a range of rotational speeds, mass flow rates, and different geometries. The pressure distribution is shown to be calculable by the superposition of the pressure drop due to the shroud and the unshrouded distribution. Moment coefficients are shown to increase with increasing mass flow rate and decreasing shroud clearance, but are little affected by the rotor/stator gap. Applying Reynolds analogy to the moment coefficients, it is estimated that heat transfer from the rotor will be controlled primarily by rate of radial cooling flow at low rotational Reynolds numbers, and will be governed primarily by Reynolds number at large rotational speeds.read more
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Journal ArticleDOI
Aerodynamic aspects of the sealing of gas-turbine rotor-stator systems
U.P. Phadke,J. M. Owen +1 more
TL;DR: In this article, the sealing characteristics of a shrouded rotor-stator system have been studied using flow visualization, pressure, and concentration measurements, including axial clearance, radial clearance, or mitered sealing.
Journal ArticleDOI
Interaction of rim seal and annulus flows in an axial flow turbine
TL;DR: In this paper, a combined computational fluid dynamics (CFD) and experimental study of interaction of main gas path and rim sealing flow was conducted on a two-stage axial turbine and included pressure measurements for the cavity formed between the stage 2 rotor disc and the upstream diaphragm.
Journal ArticleDOI
Review of fluid flow and convective heat transfer within rotating disk cavities with impinging jet
TL;DR: In this paper, a review on convective heat transfer in rotor-stator geometries with and without impinging jets is presented, which incorporates two main parts, namely, experimental/theoretical methodologies and geometry/results.
Journal ArticleDOI
Source–sink flow inside a rotating cylindrical cavity
TL;DR: In this paper, the axisymmetric flow inside a rotating cavity with radial outflow or inflow of fluid is discussed, and the basic theoretical model of Hide (1968) is extended, using the integralmomentum techniques of von Karman (1921), to include laminar and turbulent flows; both linear and nonlinear equations are considered.
Journal ArticleDOI
Experimental Measurements of Ingestion Through Turbine Rim Seals—Part I: Externally Induced Ingress
Carl M. Sangan,Oliver J. Pountney,Kunyuan Zhou,Michael T. Wilson,J. Michael Owen,Gary D. Lock +5 more
TL;DR: In this article, the authors describe a new research facility which experimentally models hot gas ingestion into the wheel space of an axial turbine stage and assess the performance of two generic (though engine-representative) rim-seal geometries in terms of the variation of concentration effectiveness with sealing flow rate.
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