Results 181 to 190 of about 10,932 (224)

On the flow between two rotating shrouded discs

Computers & Fluids, 1986
Abstract Numerical solutions to the full Navier Stokes equations for the flow enclosed between two rotating discs and a sidewall are presented. The sidewall remains fixed throughout, while we consider examples in which: (i) the bottom disc is rotating and the top disc is fixed; (ii) the two discs rotate in the same sense; (iii) the two discs rotate ...
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Heat Transfer to an Actively Cooled Shroud With Blade Rotation

Volume 5B: Heat Transfer, 2014
In this paper, an experimental study of the shroud heat transfer behavior and the effectiveness of shroud cooling under the conditions of rotation is undertaken in a single stage turbine at low rotation speeds. The shroud consists of a periodic distribution of cooling holes that are 1 mm in diameter (D).
Onieluan Tamunobere, Christopher Drewes, Sumanta Acharya   +2 more
openaire   +1 more source

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
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Acoustics of a counter-rotating shrouded propfan - Prediction and data

Journal of Aircraft, 1995
The acoustic characteristics of a counter-rotating integrated shrouded propfan are studied both theoretically and experimentally. The calculation method comprises the main noise generation mechanisms of the propulsor as steady rotor blade loading noise, rotor/rotor and rotor/struts interaction noise, inlet flow distortion noise, and broadband noise. It
Klaus Heinig, Fritz Kennepohl, Paul Traub   +2 more
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Heat Transfer to an Actively Cooled Shroud With Blade Rotation

Journal of Thermal Science and Engineering Applications, 2015
An experimental study of the shroud heat transfer behavior and the effectiveness of shroud cooling are undertaken in a single-stage turbine at low rotation speeds. The shroud consists of a periodic distribution of laterally oriented cooling holes that are angled at 45 deg to the shroud surface in a repeating circumferential pattern and has five unique ...
Onieluan Tamunobere, Christopher Drewes, Sumanta Acharya, Chiyuki Nakamata   +3 more
openaire   +1 more source

Turbine Blade Tip Cooling With Blade Rotation—Part II: Shroud Coolant Injection

Journal of Turbomachinery, 2015
In this paper, blade tip cooling is investigated with coolant injection from the shroud alone and a combination of shroud coolant injection and tip cooling. With a nominal rotation speed of 1200 rpm, each blade consists of a cut back squealer tip with a tip clearance of 1.7% of the blade span. The blades also consist of tip holes and pressure side (PS)
Onieluan Tamunobere, Sumanta Acharya
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

Rotating Instabilities in Shrouded Low Pressure Turbine at Design and Off-Design Conditions

Journal of Turbomachinery, 2023
Abstract The present study aims to analyze the rotating instabilities that may occur inside shroud cavities above rotors of low-pressure turbine configurations. Unsteady simulations have been carried out at design and off-design conditions on two configurations, one being a multi-stage configuration.
Maxime Perini, Nicolas Binder, Yannick Bousquet, Eric Schwartz   +3 more
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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

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