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Keywords: blades
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Journal Articles
Article Type: Research Papers
J. Fluids Eng. December 2011, 133(12): 121101.
Published Online: December 19, 2011
...Angelo Pasini; Lucio Torre; Angelo Cervone; Luca d’Agostino The paper illustrates the results of an experimental campaign conducted in the Cavitating Pump Rotordynamic Test Facility at ALTA S.p.A., aimed at characterizing the rotordynamic forces acting on a whirling four-bladed, tapered-hub...
Journal Articles
Article Type: Research Papers
J. Fluids Eng. November 2011, 133(11): 111102.
Published Online: October 24, 2011
... deg) at Mach 1.44 and semicone vertex angle of 10 deg. 05 01 2011 22 08 2011 24 10 2011 24 10 2011 blades compressible flow confined flow flow instability flow visualisation impellers nozzles rotors shear turbulence stratified flow supersonic flow...
Journal Articles
Article Type: Research Papers
J. Fluids Eng. October 2011, 133(10): 101303.
Published Online: October 4, 2011
... (AOK TFR). The results show that pressure fluctuations at the impeller rotating frequency and some lower frequencies dominated in the semispiral suction chamber. Pressure fluctuations at the blade passing frequency, the impeller rotating frequency, and their harmonic frequencies were identified...
Journal Articles
Article Type: Research Papers
J. Fluids Eng. July 2011, 133(7): 071102.
Published Online: July 5, 2011
...Yuka Iga; Kei Hashizume; Yoshiki Yoshida In the present study, numerical analysis of a cavitating three-blade cyclic flat-plate cascade was performed considering cavitation surge, which is a type of cavitation instability in pumping machinery. A numerical method employing a uniquely developed gas...
Journal Articles
Article Type: Research Papers
J. Fluids Eng. June 2011, 133(6): 061202.
Published Online: June 16, 2011
...Douglas Bohl; Akshey Mehta; Naratip Santitissadeekorn; Erik Bollt The flow field in a cylindrical container driven by a flat bladed impeller was investigated using particle image velocimetry (PIV). Three Reynolds numbers (0.02, 8, 108) were investigated for different impeller locations within...
Journal Articles
Article Type: Research Papers
J. Fluids Eng. June 2011, 133(6): 061104.
Published Online: June 16, 2011
... fields lying within the evaluated uncertainties. Numerical data allowed the analysis of further details of the flow that could not be measured, like load conditions of the single blades, interaction of the propeller wake with the rudder, and pressure oscillations induced by the propeller on the vault...
Journal Articles
Article Type: Research Papers
J. Fluids Eng. June 2011, 133(6): 061301.
Published Online: June 15, 2011
...Yoshiki Yoshida; Hideaki Nanri; Kengo Kikuta; Yusuke Kazami; Yuka Iga; Toshiaki Ikohagi The relationship between the thermodynamic effect and subsynchronous rotating cavitation was investigated with a focus on cavity fluctuations. Experiments on a three-bladed inducer were conducted with liquid...
Journal Articles
Article Type: Research Papers
J. Fluids Eng. May 2011, 133(5): 051104.
Published Online: June 7, 2011
.... The main conclusions may be summarized as follows. At the best efficiency point, the pressure fluctuation is very low and mainly dominated by the blade passing frequency and the first harmonic. As the impeller enters the “S-shape” domain, a substantial increase of the pressure fluctuation is observed...
Journal Articles
Article Type: Research Papers
J. Fluids Eng. April 2011, 133(4): 041303.
Published Online: May 12, 2011
... for multiphase transportation and has a higher mechanical efficiency. blades crude oil machine bearings mathematical analysis prototypes pumps seals (stoppers) shafts sliding friction synchronal rotary multiphase pump rotary cylinder frictional loss basic geometrical parameter...
Journal Articles
Article Type: Research Papers
J. Fluids Eng. April 2011, 133(4): 041102.
Published Online: May 12, 2011
... blade row) was selected with rotor and stator blade number kept constant. A generic undersea vehicle hull shape was chosen and the maximum shroud radius was required to lie within this body radius. A cylindrical rim-driven electric motor capable of generating a specific horsepower to achieve the design...
Journal Articles
Article Type: Research Papers
J. Fluids Eng. April 2011, 133(4): 041101.
Published Online: May 11, 2011
... runner blade angle Ω frequency relative to rotational frequency ω angular frequency μ mass ratio Subscripts rot rotational/rotor RS rotating stall stat stator This study was made possible by a Grant of the Swiss Commission...
Journal Articles
Article Type: Technical Briefs
J. Fluids Eng. February 2011, 133(2): 024501.
Published Online: February 23, 2011
... method and a hydraulic loss model with a variable correction factor. The blade thickness blockage effect on the flow was taken into account. The method was validated with the experimental data of the existing 17 inducers found in references. Moreover, the curves showing the relation of the correction...
Journal Articles
Article Type: Research Papers
J. Fluids Eng. February 2011, 133(2): 021102.
Published Online: February 4, 2011
...David Greenblatt On the basis of a semi-empirical model, large Gurney flaps of 10%, 20%, and 30% of the fan blade chord length were tested in a specially designed ventilation fan facility. At the highest volumetric flowrates tested, the flapped blades all produced higher pressures than the baseline...
Journal Articles
Article Type: Research Papers
J. Fluids Eng. January 2011, 133(1): 011102.
Published Online: January 28, 2011
... are predicted at three reference positions above the propeller for comparison with the experimental data: The amplitudes of the dominant components corresponding to the first, second, and third blade passing frequencies were satisfactorily predicted. It is noted that the maximum difference of pressure...
Journal Articles
Article Type: Research Papers
J. Fluids Eng. January 2011, 133(1): 011103.
Published Online: January 28, 2011
...Jesús Manuel Fernández Oro; José González; Katia M. Argüelles Díaz; Francisco Israel Guerras Colón Modern designs for centrifugal pumps consider flow unsteadiness as a main concern. The averaged impact of blade to blade structures and impeller-tongue or impeller-diffuser interactions is considered...
Journal Articles
Article Type: Research Papers
J. Fluids Eng. December 2010, 132(12): 121101.
Published Online: December 3, 2010
... admission as compared with full admission. Thus, an experiment was conducted in a linear cascade apparatus having a partial admission region in order to investigate the effect of partial admission on a blade row. The admission region was formed by a spouting nozzle installed at the inlet of the linear...
Journal Articles
Article Type: Research Papers
J. Fluids Eng. December 2010, 132(12): 121102.
Published Online: December 3, 2010
... evolved due to interaction between rotor blades and the distorted sector, especially near the trailing edge of the distortion screen. The presence of a strong mode was observed under both co- and counter-rotating inflow distortions. With throttle ramping, stall inception occurs through long and short...
Journal Articles
Article Type: Research Papers
J. Fluids Eng. November 2010, 132(11): 111101.
Published Online: November 18, 2010
... the purge cavity flow ejected downstream of the stator blade row at three flow regimes: subsonic M 2 = 0.73 , transonic M 2 = 1.12 , and supersonic M 2 = 1.33 . Experimental static pressure measurements were used to calibrate the computational model. The main flow field-purge flow interaction is found...
Journal Articles
Article Type: Research Papers
J. Fluids Eng. September 2010, 132(9): 091103.
Published Online: September 23, 2010
... in the blade passage, producing shedding vorticity in the downstream passage-flow. The passage-flow separation and the downstream volute flow, which is also affected by the passage-flow separation, have a higher impact on flow losses than the blade leading edge separation. If the gap size is not selected...
Journal Articles
Article Type: Technical Briefs
J. Fluids Eng. August 2010, 132(8): 084501.
Published Online: August 16, 2010
..., free-wake is used for wake simulation. The present free-wake describes the inboard vortices as well as the tip vortices of the blade. At each time step, the free-wake provides inflow and outflow conditions of the boundary of the Eulerian domain, and the Euler solver is used for solving the flow field...