Presented By: Aerospace Engineering
Chair's Distinguished Lecture Series: Dr. Farhan Gandhi, Rensselaer Polytechnic Institute
Farhan Gandhi
Rosalind and John J. Redfern Jr. ’33 Endowed Chair in Aerospace Engineering
Director, Center for Mobility with Vertical Lift (MOVE)
Aerospace Program Director
Rensselaer Polytechnic Institute
Location: Boeing Lecture Hall, 1109, FXB
Seminar both in-person and via Zoom
Title: Aeroacoustics of Mutli-Rotor eVTOL Configurations
Abstract:
In recent years, there has been a tremendous interest in the use of large multi-rotor electric VTOL (eVTOL) aircraft for Urban Air Mobility. Recognizing that the noise generated and propagated by these aircraft could be a significant impediment to their community acceptance, the scientific and research community is directing considerable effort to eVTOL aircraft noise mitigation, and quiet design and operation. Relative to conventional helicopters, eVTOL aircraft experience significant rotor-rotor, multirotor-wing and multirotor-ground interactions, resulting in the rotors operating in complex (and “dirty”) aerodynamic environments. This seminar presents numerical simulation results on aeroacoustics of large multirotor configurations, focusing in particular on the effect of relative rotor phasing and the effect of aerodynamic interactions. The simulations results demonstrate the potential of using relative rotor phasing to reduce noise along the inter-boom bisectors. The presentation also examines (and quantify) the noise penalty due to interactional aerodynamics -- relative to the noise generated by similar multi-rotor assemblies operating in “clean” flows.
About the Speaker:
Farhan Gandhi obtained his PhD in Aerospace Engineering from U of Maryland’s Alfred Gessow Rotorcraft Center in 1995. After 17 years on the Penn State Aerospace Faculty (where he served as Deputy Director of the Vertical Lift Research Center of Excellence), he transferred to Rensselaer Polytechnic Institute in 2012 as the Redfern Endowed Chair in Aerospace Engineering. He assumed responsibilities as RPI’s Aerospace Program Director in 2014, and as Founding Director of RPI’s Center for Mobility with Vertical Lift (MOVE) in Spring 2018. Gandhi is an AIAA Fellow and a Technical Fellow of the Vertical Flight Society (formerly the American Helicopter Society), and has chaired multiple major technical conferences and technical committees. One of the nation’s top experts in VTOL aircraft aeromechanics, advanced VTOL configurations (including multi-rotor aircraft), and reconfigurable vertical lift, he held a Joint Faculty Appointment with the US Army Research Lab, Vehicle Technology Directorate (2018-2021). Over a 26-year academic career, Gandhi has published over a 100 journal papers, 215 conference papers, advised 26 PhD students to graduation, and currently maintains a vibrant research group comprising of 2 research scientists, 11 PhD students, and several MS and undergrad students.
Rosalind and John J. Redfern Jr. ’33 Endowed Chair in Aerospace Engineering
Director, Center for Mobility with Vertical Lift (MOVE)
Aerospace Program Director
Rensselaer Polytechnic Institute
Location: Boeing Lecture Hall, 1109, FXB
Seminar both in-person and via Zoom
Title: Aeroacoustics of Mutli-Rotor eVTOL Configurations
Abstract:
In recent years, there has been a tremendous interest in the use of large multi-rotor electric VTOL (eVTOL) aircraft for Urban Air Mobility. Recognizing that the noise generated and propagated by these aircraft could be a significant impediment to their community acceptance, the scientific and research community is directing considerable effort to eVTOL aircraft noise mitigation, and quiet design and operation. Relative to conventional helicopters, eVTOL aircraft experience significant rotor-rotor, multirotor-wing and multirotor-ground interactions, resulting in the rotors operating in complex (and “dirty”) aerodynamic environments. This seminar presents numerical simulation results on aeroacoustics of large multirotor configurations, focusing in particular on the effect of relative rotor phasing and the effect of aerodynamic interactions. The simulations results demonstrate the potential of using relative rotor phasing to reduce noise along the inter-boom bisectors. The presentation also examines (and quantify) the noise penalty due to interactional aerodynamics -- relative to the noise generated by similar multi-rotor assemblies operating in “clean” flows.
About the Speaker:
Farhan Gandhi obtained his PhD in Aerospace Engineering from U of Maryland’s Alfred Gessow Rotorcraft Center in 1995. After 17 years on the Penn State Aerospace Faculty (where he served as Deputy Director of the Vertical Lift Research Center of Excellence), he transferred to Rensselaer Polytechnic Institute in 2012 as the Redfern Endowed Chair in Aerospace Engineering. He assumed responsibilities as RPI’s Aerospace Program Director in 2014, and as Founding Director of RPI’s Center for Mobility with Vertical Lift (MOVE) in Spring 2018. Gandhi is an AIAA Fellow and a Technical Fellow of the Vertical Flight Society (formerly the American Helicopter Society), and has chaired multiple major technical conferences and technical committees. One of the nation’s top experts in VTOL aircraft aeromechanics, advanced VTOL configurations (including multi-rotor aircraft), and reconfigurable vertical lift, he held a Joint Faculty Appointment with the US Army Research Lab, Vehicle Technology Directorate (2018-2021). Over a 26-year academic career, Gandhi has published over a 100 journal papers, 215 conference papers, advised 26 PhD students to graduation, and currently maintains a vibrant research group comprising of 2 research scientists, 11 PhD students, and several MS and undergrad students.
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Livestream Information
ZoomSeptember 16, 2021 (Thursday) 3:00pm
Meeting ID: 95795195437
Meeting Password: AE585
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