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Journal Articles

A Detailed Comparison on the Influence of Flow Unsteadiness Between the Vaned and Vaneless Mixed-Flow Turbocharger Turbine

M. H. Padzillah, S. Rajoo, R. F. Martinez-Botas

J. Eng. Gas Turbines Power. April 2018, 140(4): 042601.

Paper No: GTP-17-1066

DOI: https://doi.org/10.1115/1.4038076

Published Online: October 31, 2017

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Topics: Flow (Dynamics), Pressure, Turbines, Vaneless turbines, Rotors, Turbochargers, Computational fluid dynamics

Proceedings Papers

A Numerical Investigation on a New Pulse-Optimized Flow Control Method for Turbocharger Turbine Performance Improvement Under Pulsating Conditions

K. Cao, M. Yang, R. F. Martinez-Botas

Proc. ASME. GT2015, Volume 2C: Turbomachinery, V02CT42A003, June 15–19, 2015

Paper No: GT2015-42059

DOI: https://doi.org/10.1115/GT2015-42059

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Topics: Flow control, Turbines, Turbochargers, Flow (Dynamics), Nozzles, Exhaust systems, Computer simulation, Internal combustion engines, Piston engines, Potential energy

Proceedings Papers

A Cold Heat Transfer Tunnel for Gas Turbine Research on an Annular Cascade

R. F. Martinez-Botas, A. J. Main, G. D. Lock, T. V. Jones

Proc. ASME. GT1993, Volume 3B: General, V03BT16A004, May 24–27, 1993

Paper No: 93-GT-248

DOI: https://doi.org/10.1115/93-GT-248

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Topics: Cascades (Fluid dynamics), Gas turbines, Heat transfer, Tunnels, Blades, Design, Flow (Dynamics), Mach number, Nozzle guide vanes, Pressure

Proceedings Papers

Heat Transfer Measurements in an Annular Cascade of Transonic Gas Turbine Blades Using the Transient Liquid Crystal Technique

R. F. Martinez-Botas, G. D. Lock, T. V. Jones

Proc. ASME. GT1994, Volume 4: Heat Transfer; Electric Power; Industrial and Cogeneration, V004T09A024, June 13–16, 1994

Paper No: 94-GT-172

DOI: https://doi.org/10.1115/94-GT-172

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Topics: Blades, Cascades (Fluid dynamics), Gas turbines, Heat transfer, Liquid crystals, Transients (Dynamics), Heat transfer coefficients, Reynolds number, Airfoils, Annulus

Proceedings Papers

Performance of a Mixed Flow Turbocharger Turbine Under Pulsating Flow Conditions

C. Arcoumanis, I. Hakeem, L. Khezzar, R. F. Martinez-Botas, N. C. Baines

Proc. ASME. GT1995, Volume 2: Aircraft Engine; Marine; Microturbines and Small Turbomachinery, V002T04A011, June 5–8, 1995

Paper No: 95-GT-210

DOI: https://doi.org/10.1115/95-GT-210

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Topics: Flow (Dynamics), Pulsatile flow, Turbines, Turbochargers, Engines, Blades, Exhaust systems, Geometry, Design, Gases

Proceedings Papers

Numerical Calculations of a Turbine Volute Using a 3-D Navier-Stokes Solver

R. F. Martinez-Botas, K. R. Pullen, F. Shi

Proc. ASME. GT1996, Volume 1: Turbomachinery, V001T01A022, June 10–13, 1996

Paper No: 96-GT-066

DOI: https://doi.org/10.1115/96-GT-066

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Topics: Turbines, Flow (Dynamics), Momentum, Pressure, Algorithms, Computation, Computational fluid dynamics, Geometry, Interpolation, Reynolds number

Proceedings Papers

Inlet and Exit Flow Characteristics of Mixed Flow Turbines

C. Arcoumanis, R. F. Martinez-Botas, J. M. Nouri, C. C. Su

Proc. ASME. GT1998, Volume 1: Turbomachinery, V001T01A119, June 2–5, 1998

Paper No: 98-GT-495

DOI: https://doi.org/10.1115/98-GT-495

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Topics: Flow (Dynamics), Turbines, Design, Rotors, Blades, High pressure (Physics), Kinetic energy, Laser Doppler anemometry, Steady state, Stress

Proceedings Papers

Detailed Flow Measurements at the Exit of a Mixed Flow Turbine Under Steady Flow Conditions

N. Karamanis, R. F. Martinez-Botas, C. C. Su

Proc. ASME. GT1999, Volume 1: Aircraft Engine; Marine; Turbomachinery; Microturbines and Small Turbomachinery, V001T03A054, June 7–10, 1999

Paper No: 99-GT-342

DOI: https://doi.org/10.1115/99-GT-342

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Topics: Flow (Dynamics), Flow measurement, Turbines, Blades, Rotors, Design, Laser Doppler anemometry, Testing performance, Turbochargers

Proceedings Papers

Numerical and Experimental Investigation of Pulsating Flow Effect on a Nozzled and Nozzleless Mixed Flow Turbine for an Automotive Turbocharger

M. H. Padzillah, M. Yang, W. Zhuge, R. F. Martinez-Botas

Proc. ASME. GT2014, Volume 2D: Turbomachinery, V02DT42A027, June 16–20, 2014

Paper No: GT2014-26152

DOI: https://doi.org/10.1115/GT2014-26152

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Topics: Flow (Dynamics), Pulsatile flow, Turbines, Turbochargers, Simulation, Computational fluid dynamics, Pressure, Design, Nozzles, Simulation results

Proceedings Papers

Mixed Flow Turbines: Inlet and Exit Flow Under Steady and Pulsating Conditions

N. Karamanis, R. F. Martinez-Botas, C. C. Su

Proc. ASME. GT2000, Volume 1: Aircraft Engine; Marine; Turbomachinery; Microturbines and Small Turbomachinery, V001T03A041, May 8–11, 2000

Paper No: 2000-GT-0470

DOI: https://doi.org/10.1115/2000-GT-0470

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Topics: Flow (Dynamics), Turbines, Blades, Rotors, Turbochargers, Pipes, Design, Diesel, Engines, Flow measurement

Proceedings Papers

Measurement of Local Heat Transfer Coefficient and Film Cooling Effectiveness Through Discrete Holes

R. F. Martinez-Botas, C. H. N. Yuen

Proc. ASME. GT2000, Volume 3: Heat Transfer; Electric Power; Industrial and Cogeneration, V003T01A050, May 8–11, 2000

Paper No: 2000-GT-0243

DOI: https://doi.org/10.1115/2000-GT-0243

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Topics: Film cooling, Heat transfer coefficients, Density, Liquid crystals, Temperature, Adiabatic cooling, Boundary layers, Cooling, Flat plates, Heat transfer

Proceedings Papers

Film Cooling Effectiveness Downstream of Compound and Fan-Shaped Holes

C. H. N. Yuen, R. F. Martinez-Botas, J. H. Whitelaw

Proc. ASME. GT2001, Volume 3: Heat Transfer; Electric Power; Industrial and Cogeneration, V003T01A017, June 4–7, 2001

Paper No: 2001-GT-0131

DOI: https://doi.org/10.1115/2001-GT-0131

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Topics: Film cooling, Fluids, Momentum, Shapes, Carbon dioxide, Cooling, Density, Flat plates, Flow (Dynamics), Heat transfer coefficients

Proceedings Papers

Systematic One Zone Meanline Modelling of Centrifugal Compressors for Industrial Online Applications

Matteo Cicciotti, R. F. Martinez-Botas, Alessandro Romagnoli, Nina F. Thornhill, Stephanie Geist, Axel Schild

Proc. ASME. GT2013, Volume 6C: Turbomachinery, V06CT40A025, June 3–7, 2013

Paper No: GT2013-95821

DOI: https://doi.org/10.1115/GT2013-95821

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Topics: Compressors, Modeling, Artificial neural networks, Boundary-value problems, Condition monitoring, Maintenance, Optimization, Polynomials, Pressure, Regression models

Proceedings Papers

Numerical Assessment of Unsteady Flow Effects on a Nozzled Turbocharger Turbine

M. H. Padzillah, S. Rajoo, R. F. Martinez-Botas

Proc. ASME. GT2012, Volume 8: Turbomachinery, Parts A, B, and C, 745-756, June 11–15, 2012

Paper No: GT2012-69062

DOI: https://doi.org/10.1115/GT2012-69062

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Topics: Computational fluid dynamics, Pulsatile flow, Turbines, Turbochargers, Unsteady flow

Journal Articles

Unsteady Effect in a Nozzled Turbocharger Turbine

Srithar Rajoo, R. F. Martinez-Botas

J. Turbomach. July 2010, 132(3): 031001.

DOI: https://doi.org/10.1115/1.3142862

Published Online: March 24, 2010

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Topics: Flow (Dynamics), Nozzles, Pulsatile flow, Turbines, Turbochargers, Cycles

Proceedings Papers

Active Control Turbocharger (ACT): A Method to Improve Energy Extraction From an Engine Exhaust Gas

Yoann Me´rigot, Srithar Rajoo, R. F. Martinez-Botas

Proc. ASME. GT2009, Volume 5: Microturbines and Small Turbomachinery; Oil and Gas Applications, 137-151, June 8–12, 2009

Paper No: GT2009-59550

DOI: https://doi.org/10.1115/GT2009-59550

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Topics: Engines, Exhaust systems, Turbochargers, Geometry, Turbines, Flow (Dynamics), Simulation, Stress

Proceedings Papers

Lean and Straight Nozzle Vanes in a Variable Geometry Turbine: A Steady and Pulsating Flow Investigation

Srithar Rajoo, R. F. Martinez-Botas

Proc. ASME. GT2008, Volume 6: Turbomachinery, Parts A, B, and C, 1589-1601, June 9–13, 2008

Paper No: GT2008-50828

DOI: https://doi.org/10.1115/GT2008-50828

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Topics: Geometry, Nozzles, Pulsatile flow, Turbines, Flow (Dynamics), Turbochargers, Cycles, Engines, Pressure, Design

Proceedings Papers

Unsteady Effect in a Nozzled Turbocharger Turbine

Srithar Rajoo, R. F. Martinez-Botas

Proc. ASME. GT2007, Volume 6: Turbo Expo 2007, Parts A and B, 1159-1170, May 14–17, 2007

Paper No: GT2007-28323

DOI: https://doi.org/10.1115/GT2007-28323

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Topics: Turbines, Turbochargers, Flow (Dynamics), Nozzles, Pulsatile flow, Cylinders, Damping, Engines, Internal combustion engines, Test facilities

Proceedings Papers

Numerical Study of the Internal Flow Field Characteristics in Mixed Flow Turbines

D. Palfreyman, R. F. Martinez-Botas

Proc. ASME. GT2002, Volume 5: Turbo Expo 2002, Parts A and B, 455-472, June 3–6, 2002

Paper No: GT2002-30372

DOI: https://doi.org/10.1115/GT2002-30372

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Topics: Flow (Dynamics), Internal flow, Turbines, Blades, Computational fluid dynamics, Density, Vortices, Boundary-value problems, Clearances (Engineering), Geometry

Proceedings Papers

The Pulsating Flow Field in a Mixed Flow Turbocharger Turbine: An Experimental and Computational Study

D. Palfreyman, R. F. Martinez-Botas

Proc. ASME. GT2004, Volume 5: Turbo Expo 2004, Parts A and B, 697-708, June 14–17, 2004

Paper No: GT2004-53143

DOI: https://doi.org/10.1115/GT2004-53143

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Topics: Flow (Dynamics), Pulsatile flow, Turbines, Turbochargers, Computational methods, Exhaust systems, Modeling, Piston engines, Spectra (Spectroscopy), Valves

Journal citation

NARROW

A Detailed Comparison on the Influence of Flow Unsteadiness Between the Vaned and Vaneless Mixed-Flow Turbocharger Turbine

A Numerical Investigation on a New Pulse-Optimized Flow Control Method for Turbocharger Turbine Performance Improvement Under Pulsating Conditions

A Cold Heat Transfer Tunnel for Gas Turbine Research on an Annular Cascade

Heat Transfer Measurements in an Annular Cascade of Transonic Gas Turbine Blades Using the Transient Liquid Crystal Technique

Performance of a Mixed Flow Turbocharger Turbine Under Pulsating Flow Conditions

Numerical Calculations of a Turbine Volute Using a 3-D Navier-Stokes Solver

Inlet and Exit Flow Characteristics of Mixed Flow Turbines

Detailed Flow Measurements at the Exit of a Mixed Flow Turbine Under Steady Flow Conditions

Numerical and Experimental Investigation of Pulsating Flow Effect on a Nozzled and Nozzleless Mixed Flow Turbine for an Automotive Turbocharger

Mixed Flow Turbines: Inlet and Exit Flow Under Steady and Pulsating Conditions

Measurement of Local Heat Transfer Coefficient and Film Cooling Effectiveness Through Discrete Holes

Film Cooling Effectiveness Downstream of Compound and Fan-Shaped Holes

Systematic One Zone Meanline Modelling of Centrifugal Compressors for Industrial Online Applications

Numerical Assessment of Unsteady Flow Effects on a Nozzled Turbocharger Turbine

Unsteady Effect in a Nozzled Turbocharger Turbine

Active Control Turbocharger (ACT): A Method to Improve Energy Extraction From an Engine Exhaust Gas

Lean and Straight Nozzle Vanes in a Variable Geometry Turbine: A Steady and Pulsating Flow Investigation

Unsteady Effect in a Nozzled Turbocharger Turbine

Numerical Study of the Internal Flow Field Characteristics in Mixed Flow Turbines

The Pulsating Flow Field in a Mixed Flow Turbocharger Turbine: An Experimental and Computational Study

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