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Keywords: rotors
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Journal Articles
Publisher: ASME
Article Type: Research Papers
J. Turbomach. July 2012, 134(4): 041022.
Published Online: July 25, 2011
...Vikram Shyam; Ali Ameri; Jen-Ping Chen In a previous study, vane-rotor shock interactions and heat transfer on the rotor blade of a highly loaded transonic turbine stage were simulated. The geometry consists of a high pressure turbine vane and a downstream rotor blade. This study focuses...
Journal Articles
Publisher: ASME
Article Type: Research Papers
J. Turbomach. July 2012, 134(4): 041014.
Published Online: July 21, 2011
...M. Papa; V. Srinivasan; R. J. Goldstein Mass transfer measurements on the endwall and blade suction surfaces are performed in a five-blade linear cascade with a high-performance rotor blade profile. The effects of purge flow from the wheelspace cavity entering the hot gas path are simulated...
Journal Articles
Publisher: ASME
Article Type: Research Papers
J. Turbomach. July 2012, 134(4): 041008.
Published Online: July 20, 2011
... of an axial compressor in order to generate a family of compressor speed lines. The complex geometry of the analyzed swirl generators requires that the full 360 deg compressor be included in the CFD model. A full compressor can be modeled several ways in a CFD analysis, including sliding mesh and frozen rotor...
Journal Articles
Publisher: ASME
Article Type: Research Papers
J. Turbomach. July 2012, 134(4): 041001.
Published Online: July 19, 2011
...Yasharth Bhartiya; Alok Sinha An algorithm to generate a reduced order model of a multistage rotor in which each stage has a different number of blades has been developed. It is shown that a reduced order model can be developed on the basis of tuned modes of certain bladed disks which can be easily...
Journal Articles
Publisher: ASME
Article Type: Research Papers
J. Turbomach. May 2012, 134(3): 031018.
Published Online: July 15, 2011
...Rinaldo L. Miorini; Huixuan Wu; Joseph Katz The complex flow field in the tip region of a turbomachine rotor, including the tip leakage flow and tip leakage vortex (TLV), has been studied for decades. Yet many associated phenomena are still not understood. This paper provides detailed data...
Journal Articles
Publisher: ASME
Article Type: Research Papers
J. Turbomach. May 2012, 134(3): 031016.
Published Online: July 15, 2011
... software capable of generating the desired blade geometry depending on the desired design geometric parameters, which is linked to a finite volume CFD code for the calculation of rotor performance. After describing and validating the model with experimental data, the results of numerical simulations...
Journal Articles
Publisher: ASME
Article Type: Research Papers
J. Turbomach. May 2012, 134(3): 031004.
Published Online: July 14, 2011
... to the redesign of a single rotor row and two double-stage axial fans. The departure angles and work distributions in the inverse design were taken as design variables separately in optimizations of the single rotor and double-stage fans, and they were parametrically represented by means of Bézier curves, whose...
Journal Articles
Publisher: ASME
Article Type: Research Papers
J. Turbomach. March 2012, 134(2): 021019.
Published Online: June 29, 2011
.... Computational investigations were performed on a low speed rotor with a highly loaded tip region that was responsible for stall-onset. The actuator was mounted on the casing upstream of the rotor leading edge. Plasma injection had a significant impact on the predicted tip-gap flow and improved stall margin...
Journal Articles
Publisher: ASME
Article Type: Research Papers
J. Turbomach. March 2012, 134(2): 021008.
Published Online: June 23, 2011
... of unsteady loss mechanisms. This paper presents unsteady entropy measurements in an axial turbine. The measurements are conducted at the rotor exit of a one–and-one-half-stage unshrouded turbine that is representative of a highly loaded, high-pressure stage of an aero-engine. The unsteady entropy...
Journal Articles
Publisher: ASME
Article Type: Research Papers
J. Turbomach. March 2012, 134(2): 021004.
Published Online: June 22, 2011
... the nozzle and the mixed-flow rotor inlet, this design does well to preserve the exhaust gas energy in a pulsed-charged application by largely isolating the two streams entering the turbine. However, this type of volute design produces some interesting flow features as a result of unequal flows driving...
Journal Articles
Journal Articles
Publisher: ASME
Article Type: Research Papers
J. Turbomach. March 2012, 134(2): 021003.
Published Online: June 21, 2011
... the importance of being able to predict which stall inception mechanism might occur in a given compressor before and after grooves are added. Some published prediction techniques are therefore examined, but found wanting. Lastly, it is shown that casing grooves can, in some cases, be used to remove rotor blades...
Journal Articles
Journal Articles
Publisher: ASME
Article Type: Research Papers
J. Turbomach. January 2012, 134(1): 011009.
Published Online: May 26, 2011
...Anthony J. Gannon; Garth V. Hobson; William L. Davis Transient casing pressure data from a transonic rotor and rotor-stator stage measured using high-speed pressure probes embedded in the casewall over the rotor tips are analyzed. Using long data sets sampled at a high frequency, low-frequency...
Journal Articles
Publisher: ASME
Article Type: Research Papers
J. Turbomach. January 2012, 134(1): 011005.
Published Online: May 25, 2011
... and computational predictions of rotor blade surface and rotor casing heat transfer. Experimental measurements obtained with and without inlet temperature distortion are compared. Time-mean experimental measurements of rotor casing static pressure are also presented. CFD simulations have been conducted using...
Journal Articles
Journal Articles
Publisher: ASME
Article Type: Research Papers
J. Turbomach. January 2012, 134(1): 011002.
Published Online: May 24, 2011
... features necessary to define the acoustic source terms. A frequency domain approach based on Goldstein’s formulation of the acoustic analogy for moving media and Hanson’s single rotor noise method was extended to counter-rotating configurations. The far field noise predictions were compared to measured...
Journal Articles
Publisher: ASME
Article Type: Research Papers
J. Turbomach. January 2012, 134(1): 011001.
Published Online: May 24, 2011
... hand, the simulation time is drastically reduced. 23 09 2009 09 06 2010 24 05 2011 24 05 2011 blades compressors flow simulation Fourier analysis interpolation rotors stators turbomachinery Computational fluid dynamics (CFD) has become a very efficient tool...
Journal Articles
Publisher: ASME
Article Type: Research Papers
J. Turbomach. October 2011, 133(4): 041030.
Published Online: April 27, 2011
...Jean Thomassin; Huu Duc Vo; Njuki W. Mureithi Nonsynchronous vibration (NSV) is a particular type of aero-elastic phenomenon, where the rotor blades vibrate at nonintegral multiples of the shaft rotational frequencies. NSV behavior appears similar to off-design stall flutter but with a particular...
Journal Articles