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Keywords: and operability
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Journal Articles
Article Type: Research Papers
J. Turbomach. August 2023, 145(8): 081014.
Paper No: TURBO-22-1277
Published Online: May 22, 2023
... operating points. The top two plots belong to Mic #1 (inlet duct) and the bottom two pictures belong to Mic #9 (far field) at a fixed rotational speed: ( a ) 30 krpm. Mic #1 (inlet duct), ( b ) 30 krpm. Mic #9 (far field), ( c ) 4 krpm. Mic #1 (inlet duct), ( d ) 40 krpm. Mic #9 (far field), ( e ) 50 krpm...
Journal Articles
Article Type: Research Papers
J. Turbomach. July 2023, 145(7): 071017.
Paper No: TURBO-22-1184
Published Online: April 3, 2023
... clearance, a drastic decrease in the static pressure rise coefficient near the surge point was observed. At this operating condition, large, unsteady pressure fluctuation at the blade tip was confirmed, and the occurrence of tip leakage vortex breakdown was clarified by unsteady multipoint pressure...
Journal Articles
Article Type: Research Papers
J. Turbomach. July 2023, 145(7): 071006.
Paper No: TURBO-22-1334
Published Online: February 10, 2023
...-end torque MP = mixing-plane (or “Stage”) interface OEM = original equipment manufacturer OP = operating point PS = pressure side RANS = Reynolds-Averaged Navier–Stokes ref = reference value RP = rated power RS = rotor–stator QUB = Queen’s...
Journal Articles
Journal Articles
Article Type: Research Papers
J. Turbomach. July 2023, 145(7): 071003.
Paper No: TURBO-22-1288
Published Online: February 9, 2023
.... The results indicated an increase in rotor pressure ratio at all operating conditions with the application of the casing treatment. The stall margin also increased at all rotor speeds. Efficiency increases were observed with the casing treatment at design conditions and some off-design conditions. Numerical...
Journal Articles
Article Type: Research Papers
J. Turbomach. May 2023, 145(5): 051010.
Paper No: TURBO-22-1284
Published Online: November 25, 2022
... compressors and pumps compressor stall surge and operability Turbocharging is an enabling technology to decarbonize the automotive industry and help transition toward a sustainable future. With the target of reducing greenhouse gas emissions, the turbocharger compressor, typically a centrifugal...
Journal Articles
Article Type: Research Papers
J. Turbomach. May 2023, 145(5): 051003.
Paper No: TURBO-22-1146
Published Online: November 8, 2022
... is observed as the tip relative Mach number nears unity. Long length-scale modal oscillations can be detected only at the transonic operating condition while spike disturbances are identified as the precursor to instability at subsonic and supersonic tips relative Mach numbers. Finally, the impeller...
Journal Articles
Journal Articles
Article Type: Research Papers
J. Turbomach. March 2023, 145(3): 031015.
Paper No: TURBO-22-1248
Published Online: November 3, 2022
... urbomachinery . 14 08 2022 22 09 2022 22 09 2022 03 11 2022 boundary layer development compressor stall surge and operability computational fluid dynamics (CFD) measurement techniques National Aeronautics and Space Administration 10.13039/100000104 NNX17AH42A...
Journal Articles
Article Type: Research Papers
J. Turbomach. February 2023, 145(2): 021012.
Paper No: TURBO-20-1233
Published Online: October 20, 2022
...Krishan S. Chana; Robert J. Miller Reaction is the fundamental parameter by which the asymmetry of the velocity triangle of a stage is set. Little is understood about the effect that a reaction has on either the efficiency or the operating range of a compressor. A particular difficulty...
Journal Articles
Article Type: Research Papers
J. Turbomach. September 2022, 144(9): 091015.
Paper No: TURBO-22-1072
Published Online: August 1, 2022
...-annulus, unsteady CFD simulations are used to explain the stall inception mechanisms for the fan at low- and high-speed operating points. A combination of steady and unsteady simulations shows that the fan is predicted to be sensitive to leading edge damage at low-speed, but insensitive at high-speed...
Journal Articles
Journal Articles
Article Type: Research Papers
J. Turbomach. May 2022, 144(5): 051001.
Paper No: TURBO-21-1183
Published Online: November 15, 2021
...Demetrios Lefas; Robert J. Miller Every supersonic fan or compressor blade row has a streamtube, the “sonic streamtube,” which operates with a blade relative inlet Mach number of one. A key parameter in the design of the “sonic streamtube” is the area ratio between the blade throat area...
Journal Articles
Article Type: Research Papers
J. Turbomach. April 2022, 144(4): 041005.
Paper No: TURBO-19-1105
Published Online: November 5, 2021
... 2021 27 09 2021 05 11 2021 compressor stall surge and operability computational fluid dynamics (CFD) fan compressor A real-world system is seldom deterministic in nature. There is always an element of uncertainty present in the parameters that define the system...
Journal Articles
Article Type: Research Papers
J. Turbomach. January 2022, 144(1): 011009.
Paper No: TURBO-21-1145
Published Online: September 21, 2021
... compressor stall surge and operability computational fluid dynamics (CFD) Imperial College London 10.13039/501100000761 01015425 Compressor tip leakage flow plays a dominant role in determining compressor work input, efficiency, and stability [ 1 ]. Due to the multi-scale nature...
Journal Articles
Article Type: Research Papers
J. Turbomach. October 2021, 143(10): 101010.
Paper No: TURBO-21-1015
Published Online: May 17, 2021
... impeller, a splittered vaned radial diffuser (RD), and axial outlet guide vanes (OGVs). The methodology for calculating the performance is detailed, including the consideration of humidity in order to minimize errors related in particular to operating atmospheric conditions. The shift of the surge line...
Journal Articles
Article Type: Research Papers
J. Turbomach. September 2021, 143(9): 091013.
Paper No: TURBO-20-1052
Published Online: May 12, 2021
... results. A saddle region appeared in the energy performance curves of the three tip clearances, and with the decrease of clearance, the head and efficiency of the mixed-flow pump increased to varying degrees, but the critical stall point shifted to the large flowrate, and the stable operating range...
Journal Articles
Article Type: Research Papers
J. Turbomach. September 2021, 143(9): 091010.
Paper No: TURBO-20-1397
Published Online: May 11, 2021
... Institute (IGTI) of ASME for publication in the J ournal of T urbomachinery . 27 11 2020 17 02 2021 18 02 2021 11 05 2021 compressor stall surge and operability fan compressor and turbine aerodynamic design Mitigating surge and rotating stall in axial...
Journal Articles
Article Type: Research Papers
J. Turbomach. August 2021, 143(8): 081008.
Paper No: TURBO-20-1357
Published Online: April 26, 2021
...Toshimasa Miura; Hideaki Yamashita; Ryota Takeuchi; Naoto Sakai Centrifugal compressors employed in the oil and gas industry are operated at high gas pressure conditions and are used in a wide operation range. Accurate prediction of the rotating stall and the destabilizing aerodynamic force is one...
Journal Articles
Article Type: Research Papers
J. Turbomach. June 2021, 143(6): 061006.
Paper No: TURBO-19-1323
Published Online: April 8, 2021
... signals for pulsed suction at 80 Hz in a quiescent flow condition Frequency spectra of pressure signals for pulsed suction at 80 Hz in a quiescent flow condition Unsteady controlling parameters or factors play crucial roles in the effective operation of unsteady flow control methods [ 23 , 24...