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Taher Halawa
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Journal Articles

Numerical and Experimental Investigation of the Performance of a Vertical Axis Wind Turbine Based on the Magnetic Levitation Concept

Taher Halawa
Journal: Journal of Energy Resources Technology
Article Type: Technical Briefs
J. Energy Resour. Technol. September 2022, 144(9): 094502.
Paper No: JERT-21-1284
DOI: https://doi.org/10.1115/1.4053577
Published Online: February 16, 2022
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Topics: Design, Generators, Magnetic levitation, Magnets, Rotors, Wind turbines, Stators, Turbines, Vertical axis wind turbines, Magnetic fields
Journal Articles

Numerical Investigation of Smoke Propagation in Road Tunnels Caused by a Burned Truck

Taher Halawa
Journal: ASME Journal of Engineering for Sustainable Buildings and Cities
Article Type: Research Papers
J. Eng. Sustain. Bldgs. Cities. February 2021, 2(1): 011003.
Paper No: JESBC-20-1005
DOI: https://doi.org/10.1115/1.4048974
Published Online: November 23, 2020
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Topics: Fire, Smoke, Trucks, Tunnels, Ventilation
Journal Articles

On the Use of Solid Curtains Near Smoke Extraction Vents to Control Smoke Spread Resulting From Fire in Road Tunnels

Taher Halawa
Journal: Journal of Thermal Science and Engineering Applications
Article Type: Research Papers
J. Thermal Sci. Eng. Appl. June 2021, 13(3): 031025.
Paper No: TSEA-20-1465
DOI: https://doi.org/10.1115/1.4048670
Published Online: November 6, 2020
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Topics: Fire, Smoke, Tunnels, Vents
Journal Articles

Numerical Simulation of the Evacuation Process and Smoke Propagation Due to a Fire in a Road Tunnel With Transverse Ventilation System

Taher Halawa
Journal: Journal of Thermal Science and Engineering Applications
Article Type: Research Papers
J. Thermal Sci. Eng. Appl. June 2021, 13(3): 031015.
Paper No: TSEA-20-1117
DOI: https://doi.org/10.1115/1.4047523
Published Online: October 27, 2020
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Topics: Evacuations, Fire, Smoke, Tunnels
Journal Articles

Optimization of the Efficiency of Stall Control Using Air Injection for Centrifugal Compressors—Additional Findings

Taher Halawa
Journal: Journal of Engineering for Gas Turbines and Power
Article Type: Technical Briefs
J. Eng. Gas Turbines Power. December 2018, 140(12): 124501.
Paper No: GTP-18-1074
DOI: https://doi.org/10.1115/1.4039820
Published Online: August 9, 2018
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Topics: Compressors, Diffusers, Optimization, Flow (Dynamics), Kinetic energy, Fluids
Journal Articles

Influence of Changing Casing Groove Parameters on the Performance of Centrifugal Compressors Near Stall Condition

Taher Halawa, Mohamed S. Gadala, Mohamed Alqaradawi, Osama Badr
Journal: Journal of Fluids Engineering
Article Type: Research-Article
J. Fluids Eng. February 2016, 138(2): 021104.
Paper No: FE-15-1050
DOI: https://doi.org/10.1115/1.4031311
Published Online: September 10, 2015
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Topics: Blades, Compressors, Computer simulation, Engineering simulation, Flow (Dynamics), Impellers, Pressure, Simulation, Optimization
Journal Articles

Optimization of the Efficiency of Stall Control Using Air Injection for Centrifugal Compressors

Taher Halawa, Mohamed S. Gadala, Mohamed Alqaradawi, Osama Badr
Journal: Journal of Engineering for Gas Turbines and Power
Article Type: Research-Article
J. Eng. Gas Turbines Power. July 2015, 137(7): 072604.
Paper No: GTP-14-1513
DOI: https://doi.org/10.1115/1.4029169
Published Online: July 1, 2015
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Topics: Compressors, Diffusers, Flow (Dynamics), Fluids, Impellers, Pressure, Computer simulation, Design, Optimization, Blades
Proceedings Papers

Numerical Simulation of Using Combined Active and Passive Stall Control Techniques in Centrifugal Compressors

Taher Halawa, Mohamed Alqaradawi, Osama Badr, Mohamed S. Gadala
Proc. ASME. IMECE2014, Volume 7: Fluids Engineering Systems and Technologies, V007T09A026, November 14–20, 2014
Paper No: IMECE2014-37983
DOI: https://doi.org/10.1115/IMECE2014-37983
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Topics: Compressors, Computer simulation, Flow (Dynamics), Stability, Blades, Flow separation, Impellers, Kinetic energy, Leakage flows, Passive control
Proceedings Papers

Numerical Investigation of Rotating Stall Characteristics and Active Stall Control in Centrifugal Compressors

Taher Halawa, Mohamed Alqaradawi, Osama Badr, Mohamed S. Gadala
Proc. ASME. POWER2014, Volume 2: Simple and Combined Cycles; Advanced Energy Systems and Renewables (Wind, Solar and Geothermal); Energy Water Nexus; Thermal Hydraulics and CFD; Nuclear Plant Design, Licensing and Construction; Performance Testing and Performance Test Codes; Student Paper Competition, V002T11A002, July 28–31, 2014
Paper No: POWER2014-32052
DOI: https://doi.org/10.1115/POWER2014-32052
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Topics: Compressors, Flow (Dynamics), Computer simulation, Delays, Design, Flow separation, Fluids, Impellers, Leakage flows, Stall inception
Proceedings Papers

Numerical Simulation of Stall Development Into Surge and Stall Control Using Air Injection in Centrifugal Compressors

Taher Halawa, Mohamed Alqaradawi, Osama Badr, Mohamed S. Gadala
Proc. ASME. POWER2014, Volume 2: Simple and Combined Cycles; Advanced Energy Systems and Renewables (Wind, Solar and Geothermal); Energy Water Nexus; Thermal Hydraulics and CFD; Nuclear Plant Design, Licensing and Construction; Performance Testing and Performance Test Codes; Student Paper Competition, V002T11A003, July 28–31, 2014
Paper No: POWER2014-32053
DOI: https://doi.org/10.1115/POWER2014-32053
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Topics: Compressors, Computer simulation, Surges, Fluctuations (Physics), Impellers, Flow (Dynamics), Pressure, Blades, Design, Optimization
Proceedings Papers

Numerical Simulation and Control of Rotating Stall in a Transonic Centrifugal Compressor

Taher Halawa, Mohamed Alqaradawi, Osama Badr, Mohamed S. Gadala
Proc. ASME. ESDA2014, Volume 2: Dynamics, Vibration and Control; Energy; Fluids Engineering; Micro and Nano Manufacturing, V002T11A024, July 25–27, 2014
Paper No: ESDA2014-20589
DOI: https://doi.org/10.1115/ESDA2014-20589
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Topics: Compressors, Computer simulation, Impellers, Diffusers, Blades, Fluids, Stall inception, Flow (Dynamics), Fluctuations (Physics), Leakage flows
Proceedings Papers

Numerical Investigation of Steady Air Injection Flow to Control Rotating Stall in Centrifugal Compressors

Taher Halawa, Mohamed Alqaradawi, Osama Badr, Mohamed S. Gadala
Proc. ASME. ESDA2014, Volume 2: Dynamics, Vibration and Control; Energy; Fluids Engineering; Micro and Nano Manufacturing, V002T11A025, July 25–27, 2014
Paper No: ESDA2014-20590
DOI: https://doi.org/10.1115/ESDA2014-20590
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Topics: Compressors, Flow (Dynamics), Diffusers, Fluids, Kinetic energy, Surges, Computer simulation, Design, Impellers