Results 141 to 150 of about 374 (172)

Study of a high rotational speed shrouded centrifugal fan: Aerodynamics and effects of a shroud-associated cavity on the performance

Proceedings of the Institution of Mechanical Engineers, Part A: Journal of Power and Energy, 2010
A centrifugal fan with a high rotational velocity and compact dimension is studied numerically and experimentally in this paper. The fan consists of a shrouded impeller rotating at 34 000 r/min with a small cavity between the impeller and outer casing.
S Khelladi, C Sarraf, F Bakir, R Rey
openaire   +1 more source

LES Study of Flow Between Shrouded Co-rotating Disks

Flow, Turbulence and Combustion, 2013
Large eddy simulations of turbulent flow between shrouded co-rotating disks, representing a simplified model of a hard disk drive, are performed. The computation domain surrounds a complete disk and is bounded at top and bottom by half a disk. Therefore, it is possible to compute the fluctuating pressure field surrounding the middle disk.
Tomoya Washizu, Florian Lubisch, Shinnosuke Obi   +2 more
openaire   +1 more source

Experiments on a shrouded, parallel disk system with rotation and coolant throughflow

International Journal of Heat and Mass Transfer, 1973
Abstract The heat transfer and fluid flow characteristics of a cylindrical enclosure having both rotating and stationary walls have been investigated in the presence of coolant throughflow. The research was motivated by cooling applications in cavities and enclosures which may be situated adjacent to the rotating shaft in gas turbines, compressors ...
J.P. Yu, E.M. Sparrow, E.R.G. Eckert
openaire   +1 more source

Free Vibration of a Rotating Disk–Blade Coupled System With Shrouds

Volume 5: Manufacturing Materials and Metallurgy; Ceramics; Structures and Dynamics; Controls, Diagnostics and Instrumentation; Education; General, 1996
The free vibration of rotating disk–blade coupled system is investigated by the Ritz method. Centrifugal effects due to rotation are taken into account for both of the disk and blades. The boundary and continuity conditions between the disk and blades are satisfied by means of artificial springs introduced at their joints, and the orthogonal ...
Yukinori Kobayashi, Gen Yamada, Takahiro Tomioka   +2 more
openaire   +1 more source

Experimental identification of rotating instability of an axial fan with shrouded rotor

Proceedings of the Institution of Mechanical Engineers, Part A: Journal of Power and Energy, 2015
The rotating instability phenomenon is investigated experimentally on a laboratory low-speed axial fan. Unsteady pressure measurements are performed close to the rotor leading edge, in the far-field in the upstream-duct section, and within the rotating frame by using Kulite sensors near the blade tip.
Pardowitz, Benjamin, Moreau, Antoine, Tapken, Ulf, Enghardt, Lars   +3 more
openaire   +2 more sources

Flows around rotating disks with and without rim-shroud gap

Experiments in Fluids, 2009
Experimental and numerical approaches have been used to study the effect of the radial rim-shroud gap on the flow structures found around a rotating disk in a finite cylindrical casing. When the radius of the disk and the inner radius of the casing are comparable and there is no radial gap, instabilities bring spiral rolls with a positive front angle ...
Takashi Watanabe, Hiroyuki Furukawa
openaire   +1 more source

Heat Transfer From a Shrouded Rotating Disk With Film Cooling

Journal of Heat Transfer, 1966
A study of the cooling effect of secondary fluid injection on the heat transfer between a shrouded rotating disk and a radially inward main flow stream is presented. The investigation is intended as a model study of film-cooled, radial-flow gas turbines.
D. E. Metzger, J. W. Mitchell
openaire   +1 more source

Shroud Cooling with Blade Rotation Using Discrete Holes and an Upstream Slot

Journal of Thermophysics and Heat Transfer, 2016
Shroud film cooling above the blade row in a low-speed rotating turbine facility is investigated with coolant injected through an upstream slot in combination with injection through angled discrete holes on the shroud. Measurements of the film-cooling effectiveness are performed with coolant injection from the slot alone, from discrete-shroud holes ...
Onieluan Tamunobere, Sumanta Acharya
openaire   +1 more source

Heat Transfer From a Shrouded Rotating Disk to a Single Fluid Stream

Journal of Heat Transfer, 1965
This paper presents the initial results of a model study to determine the heat-transfer characteristics of radial-flow gas turbines. A test facility was constructed and several unconventional experimental techniques were developed for use in the facility.
J. W. Mitchell, D. E. Metzger
openaire   +1 more source

Numerical solution of laminar recirculating flow between shrouded rotating disks

Computers & Fluids, 1979
Abstract In this paper we develop a method to obtain the numerical solution of the problem of recirculating flow between shrouded rotating disks. The major difficulty of this type of problem is in obtaining convergence at high Reynolds numbers. With the technique developed in this paper we have obtained convergence for Reynolds numbers up to 10,000 ...
Schultz, David H., Shah, V. L.
openaire   +2 more sources