1,721,019 research outputs found
Experimental analysis of the velocity field inside a turbine blade cooling channel by means of particle image velocimetry
No full textExperimental Investigation of the aerothermal performance of a high blockage rib-roughened cooling channel
No full textThe present study deals with a detailed experimental investigation of the turbulent flow
inside a rib-roughened turbine blade cooling channel. The measurements are carried out
in a stationary straight channel with high blockage ribs installed on one wall. The main
objective is to enhance the understanding and deepen the analysis of this complex flow
field with the help of highly resolved particle image velocimetry measurements. A quasithree-
dimensional view of the flow field is achieved, allowing the identification of the
main time-averaged coherent structures. The combined analysis of the present aerodynamic
results with available heat transfer data emphasizes the role of the mean and
fluctuating flow features in the heat transfer process. In particular, the stream wise/
normal to the wall component of the Reynolds stress tensor is shown to be strictly related
to the heat transfer rate on the channel surfaces. A correlation to estimate the heat
transfer field from the aerodynamic data is presented for the high blockage rib roughened
channel flow
Misure PIV del campo di moto all'interno della girante di ventilatori a flusso trasversale
No full textAero-thermodynamic performance investigation of a rib roughened cooling channel flow with high blockage ratio
No full textCombined heat transfer and flow field analysis in rib-roughened cooling passages for turbine blades
No full textThe present study deals with a detailed experimental investigation of the turbulent flow inside a rib-roughened turbine blade cooling channel. The measurements are carried out by means of a 2D PIV technique in a stationary straight channel with 10% blockage ribs installed on one wall. They constitute the necessary complement to the already available heat transfer data. The present aerodynamic results are compared with available data on a similar channel but with a blockage ratio of 30 %. The main objective is to deepen the analysis and enhance the understanding of this complex flow field, particularly with respect to the definition of a mean flow model and to its aero-thermal characteristics. More precisely, the stream-wise/normal to the wall component of the Reynolds stress tensor is shown to be closely related to the heat transfer rate on the channel surfaces. A correlation to estimate the heat transfer field from the aerodynamic data, previously obtained for the high blockage rib roughened channel flow, is validated for this 10% blockage configuration
Aero-thermal performance investigation of an internal cooling channel with high blockage ratio
No full text
Aero-acoustics in a tangential blower: validation of the CFD flow distribution using advanced PIV Techniques
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