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Proceedings Papers

Optimisation of an ORC Radial Turbine Using a Reduced-Order Model Coupled With CFD

Eva Alvarez-Regueiro, Bijie Yang, Esperanza Barrera-Medrano, Ricardo Martinez-Botas, Srithar Rajoo
Proc. ASME. GT2022, Volume 4: Cycle Innovations; Cycle Innovations: Energy Storage, V004T06A011, June 13–17, 2022
Publisher: American Society of Mechanical Engineers
Paper No: GT2022-80944
https://doi.org/10.1115/GT2022-80944
View Paper titled, Optimisation of an ORC Radial Turbine Using a Reduced-Order Model Coupled With CFD
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Topics: Computational fluid dynamics, Optimization, Organic Rankine cycle, Turbines, Flow (Dynamics), Geometry, Design, Fluids, Algorithms, Cycles
Journal Articles

Optimization of an Organic Ranking Cycle Radial Turbine Using a Reduced-Order Model Coupled With Computational Fluid Dynamics

Eva Alvarez-Regueiro, Bijie Yang, Esperanza Barrera-Medrano, Ricardo Martinez-Botas, Srithar Rajoo
Journal: Journal of Engineering for Gas Turbines and Power
Publisher: ASME
Article Type: Research-Article
J. Eng. Gas Turbines Power. October 2022, 144(10): 101012.
Paper No: GTP-22-1286
https://doi.org/10.1115/1.4055359
Published Online: September 12, 2022
View Article titled, Optimization of an Organic Ranking Cycle Radial Turbine Using a Reduced-Order Model Coupled With Computational Fluid Dynamics
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Topics: Blades, Design, Flow (Dynamics), Geometry, Nozzles, Optimization, Rotors, Turbines, Computational fluid dynamics, Pressure
Proceedings Papers

Numerical Analysis of Non-Radial Blading in a Low Speed and Low Pressure Turbine for Electric Turbocompounding Applications

Eva Alvarez-Regueiro, Esperanza Barrera-Medrano, Ricardo Martinez-Botas, Srithar Rajoo
Proc. ASME. GT2021, Volume 2D: Turbomachinery — Multidisciplinary Design Approaches, Optimization, and Uncertainty Quantification; Radial Turbomachinery Aerodynamics; Unsteady Flows in Turbomachinery, V02DT37A017, June 7–11, 2021
Publisher: American Society of Mechanical Engineers
Paper No: GT2021-60239
https://doi.org/10.1115/GT2021-60239
View Paper titled, Numerical Analysis of Non-Radial Blading in a Low Speed and Low Pressure Turbine for Electric Turbocompounding Applications
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Topics: Numerical analysis, Pressure, Turbines, Design, Rotors, Blades, Computational fluid dynamics, Computer simulation, Fibers, Deformation
Proceedings Papers

Meanline Modeling of Asymmetrical Twin-Scroll Turbine: Loss Coefficient Transferability Between Turbines of Different Sizes

Meng Soon Chiong, Srithar Rajoo, Ricardo F. Martinez-Botas, Torsten Palenschat, Peter Weitzman, Mark Anderson, Thiago Ebel
Proc. ASME. GT2019, Volume 2B: Turbomachinery, V02BT44A021, June 17–21, 2019
Publisher: American Society of Mechanical Engineers
Paper No: GT2019-91982
https://doi.org/10.1115/GT2019-91982
View Paper titled, Meanline Modeling of Asymmetrical Twin-Scroll Turbine: Loss Coefficient Transferability Between Turbines of Different Sizes
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Topics: Modeling, Turbines, Exhaust gas recirculation, Flow (Dynamics), Geometry, High pressure (Physics), Performance, Pressure, Rotors, Turbochargers
Proceedings Papers

Multi-Injection Turbine Housing: A Novel Concept for Tip-Leakage Improvement in Radial Turbines

Hao Liu, Alessandro Romagnoli, Ricardo Martinez-Botas, Srithar Rajoo, Muhamad Hasbullah Padzillah
Proc. ASME. GT2017, Volume 2C: Turbomachinery, V02CT44A022, June 26–30, 2017
Publisher: American Society of Mechanical Engineers
Paper No: GT2017-63975
https://doi.org/10.1115/GT2017-63975
View Paper titled, Multi-Injection Turbine Housing: A Novel Concept for Tip-Leakage Improvement in Radial Turbines
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Topics: Leakage, Turbines, Flow (Dynamics), Blades, Yaw, Fluids, Pressure, Suction, Torque, Vortices
Proceedings Papers

Analytical Investigation of a Thermal-Supercharged Internal Combustion Engine Compounded With Organic Rankine Cycle for Waste Heat Recovery

Manuel Jiménez-Arreola, Fabio Dal Magro, Alessandro Romagnoli, Meng Soon Chiong, Srithar Rajoo, Ricardo F. Martinez-Botas
Proc. ASME. GT2017, Volume 3: Coal, Biomass and Alternative Fuels; Cycle Innovations; Electric Power; Industrial and Cogeneration Applications; Organic Rankine Cycle Power Systems, V003T28A005, June 26–30, 2017
Publisher: American Society of Mechanical Engineers
Paper No: GT2017-65096
https://doi.org/10.1115/GT2017-65096
View Paper titled, Analytical Investigation of a Thermal-Supercharged Internal Combustion Engine Compounded With Organic Rankine Cycle for Waste Heat Recovery
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Topics: Heat recovery, Internal combustion engines, Organic Rankine cycle, Rankine cycle, Engines, Pressure, Exhaust systems, Waste heat, Turbochargers, Benzene
Journal Articles

Effect of Exit Pressure Pulsation on the Performance and Stability Limit of a Turbocharger Centrifugal Compressor

Maria Esperanza Barrera-Medrano, Peter Newton, Ricardo Martinez-Botas, Srithar Rajoo, Isao Tomita, Seiichi Ibaraki
Journal: Journal of Engineering for Gas Turbines and Power
Publisher: ASME
Article Type: Research-Article
J. Eng. Gas Turbines Power. May 2017, 139(5): 052601.
Paper No: GTP-16-1366
https://doi.org/10.1115/1.4034689
Published Online: December 21, 2016
View Article titled, Effect of Exit Pressure Pulsation on the Performance and Stability Limit of a Turbocharger Centrifugal Compressor
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Topics: Compressors, Flow (Dynamics), Pressure, Surges, Valves, Engines, Compression, Stability, Pulsatile flow
Proceedings Papers

Effect of Exit Pressure Pulsation on the Performance and Stability Limit of a Turbocharger Centrifugal Compressor

Maria Esperanza Barrera-Medrano, Peter Newton, Ricardo Martinez-Botas, Srithar Rajoo, Isao Tomita, Seiichi Ibaraki
Proc. ASME. GT2016, Volume 2D: Turbomachinery, V02DT42A003, June 13–17, 2016
Publisher: American Society of Mechanical Engineers
Paper No: GT2016-56109
https://doi.org/10.1115/GT2016-56109
View Paper titled, Effect of Exit Pressure Pulsation on the Performance and Stability Limit of a Turbocharger Centrifugal Compressor
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Topics: Compressors, Pressure, Stability, Turbochargers, Surges, Valves, Flow (Dynamics), Compression, Diffusers, Dynamics (Mechanics)
Proceedings Papers

Assessment of Partial-Admission Characteristics in Twin-Entry Turbine Pulse Performance Modelling

Meng Soon Chiong, Srithar Rajoo, Alessandro Romagnoli, Aaron W. Costall, Ricardo F. Martinez-Botas
Proc. ASME. GT2015, Volume 2C: Turbomachinery, V02CT42A022, June 15–19, 2015
Publisher: American Society of Mechanical Engineers
Paper No: GT2015-42687
https://doi.org/10.1115/GT2015-42687
View Paper titled, Assessment of Partial-Admission Characteristics in Twin-Entry Turbine Pulse Performance Modelling
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Topics: Modeling, Turbines, Flow (Dynamics), Cycles, Engines, Exhaust systems, Test facilities
Proceedings Papers

Assessment of Turbocharger Turbine Unsteady Flow Modelling Methodology on Engine Performance

Ammar Mustafa, Ricardo F. Martinez-Botas, Apostolos Pesiridis, Meng Soon Chiong, Srithar Rajoo
Proc. ASME. ESDA2014, Volume 1: Applied Mechanics; Automotive Systems; Biomedical Biotechnology Engineering; Computational Mechanics; Design; Digital Manufacturing; Education; Marine and Aerospace Applications, V001T02A014, July 25–27, 2014
Publisher: American Society of Mechanical Engineers
Paper No: ESDA2014-20392
https://doi.org/10.1115/ESDA2014-20392
View Paper titled, Assessment of Turbocharger Turbine Unsteady Flow Modelling Methodology on Engine Performance
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Topics: Engines, Modeling, Turbines, Turbochargers, Unsteady flow, Steady state, Computer software, Design, Flow (Dynamics), Simulation
Proceedings Papers

Influence of Volute Cross-Sectional Shape of a Nozzleless Turbocharger Turbine Under Pulsating Flow Conditions

Mingyang Yang, Ricardo Martinez-Botas, Srithar Rajoo, Takao Yokoyama, Seiichi Ibaraki
Proc. ASME. GT2014, Volume 2D: Turbomachinery, V02DT42A025, June 16–20, 2014
Publisher: American Society of Mechanical Engineers
Paper No: GT2014-26150
https://doi.org/10.1115/GT2014-26150
View Paper titled, Influence of Volute Cross-Sectional Shape of a Nozzleless Turbocharger Turbine Under Pulsating Flow Conditions
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Topics: Pulsatile flow, Shapes, Turbines, Turbochargers, Computational fluid dynamics, Flow (Dynamics), Rotors, Cycles
Proceedings Papers

Assessment of Cycle Averaged Turbocharger Maps Through One Dimensional and Mean-Line Coupled Codes

Meng Soon Chiong, Srithar Rajoo, Aaron W. Costall, Wan Saiful-Islam Bin Wan Salim, Alessandro Romagnoli, Ricardo F. Martinez-Botas
Proc. ASME. GT2013, Volume 6C: Turbomachinery, V06CT40A026, June 3–7, 2013
Publisher: American Society of Mechanical Engineers
Paper No: GT2013-95906
https://doi.org/10.1115/GT2013-95906
View Paper titled, Assessment of Cycle Averaged Turbocharger Maps Through One Dimensional and Mean-Line Coupled Codes
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Topics: Cycles, Turbochargers, Engines, Turbines, Emissions, Flow (Dynamics), Internal combustion engines, Modeling, Turbocharged engines, Carbon dioxide
Proceedings Papers

Unsteady Performance Prediction of a Single Entry Mixed Flow Turbine Using 1-D Gas Dynamic Code Extended With Meanline Model

Meng Soon Chiong, Srithar Rajoo, Alessandro Romagnoli, Ricardo Martinez-Botas
Proc. ASME. GT2012, Volume 5: Manufacturing Materials and Metallurgy; Marine; Microturbines and Small Turbomachinery; Supercritical CO2 Power Cycles, 781-795, June 11–15, 2012
Publisher: American Society of Mechanical Engineers
Paper No: GT2012-69176
https://doi.org/10.1115/GT2012-69176
View Paper titled, Unsteady Performance Prediction of a Single Entry Mixed Flow Turbine Using 1-D Gas Dynamic Code Extended With Meanline Model
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Topics: Flow (Dynamics), Turbines, Engines, Turbochargers, Simulation, Carbon, Cycles, Exhaust systems, Fuel consumption, Modeling
Journal Articles

Comparison Between the Steady Performance of Double-Entry and Twin-Entry Turbocharger Turbines

Alessandro Romagnoli, Colin D. Copeland, Ricardo Martinez-Botas, Martin Seiler, Srithar Rajoo, Aaron Costall
Journal: Journal of Turbomachinery
Publisher: ASME
Article Type: Research-Article
J. Turbomach. January 2013, 135(1): 011042.
Paper No: TURBO-11-1184
https://doi.org/10.1115/1.4006566
Published Online: October 31, 2012
View Article titled, Comparison Between the Steady Performance of Double-Entry and Twin-Entry Turbocharger Turbines
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Topics: Flow (Dynamics), Turbines
Proceedings Papers

Comparison Between the Steady Performance of Double-Entry and Twin-Entry Turbocharger Turbines

Alessandro Romagnoli, Colin Copeland, Ricardo Martinez-Botas, Srithar Rajoo, Martin Seiler, Aaron Costall
Proc. ASME. GT2011, Volume 7: Turbomachinery, Parts A, B, and C, 1995-2007, June 6–10, 2011
Publisher: American Society of Mechanical Engineers
Paper No: GT2011-45525
https://doi.org/10.1115/GT2011-45525
View Paper titled, Comparison Between the Steady Performance of Double-Entry and Twin-Entry Turbocharger Turbines
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Topics: Turbines, Turbochargers
Journal Articles

Unsteady Effect in a Nozzled Turbocharger Turbine

Srithar Rajoo, R. F. Martinez-Botas
Journal: Journal of Turbomachinery
Publisher: ASME
Article Type: Research Papers
J. Turbomach. July 2010, 132(3): 031001.
https://doi.org/10.1115/1.3142862
Published Online: March 24, 2010
View Article titled, Unsteady Effect in a Nozzled Turbocharger Turbine
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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
Publisher: American Society of Mechanical Engineers
Paper No: GT2009-59550
https://doi.org/10.1115/GT2009-59550
View Paper titled, Active Control Turbocharger (ACT): A Method to Improve Energy Extraction From an Engine Exhaust Gas
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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
Publisher: American Society of Mechanical Engineers
Paper No: GT2008-50828
https://doi.org/10.1115/GT2008-50828
View Paper titled, Lean and Straight Nozzle Vanes in a Variable Geometry Turbine: A Steady and Pulsating Flow Investigation
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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
Publisher: American Society of Mechanical Engineers
Paper No: GT2007-28323
https://doi.org/10.1115/GT2007-28323
View Paper titled, Unsteady Effect in a Nozzled Turbocharger Turbine
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Topics: Turbines, Turbochargers, Flow (Dynamics), Nozzles, Pulsatile flow, Cylinders, Damping, Engines, Internal combustion engines, Test facilities
Journal Articles

Mixed Flow Turbine Research: A Review

Srithar Rajoo, Ricardo Martinez-Botas
Journal: Journal of Turbomachinery
Publisher: ASME
Article Type: Technology Review
J. Turbomach. October 2008, 130(4): 044001.
https://doi.org/10.1115/1.2812326
Published Online: June 27, 2008
View Article titled, Mixed Flow Turbine Research: A Review
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Topics: Flow (Dynamics), Turbines, Rotors