A Method for Simultaneous Optimization of Power Split and Flight Path Trajectories for Hybrid Electric Aircraft

2021 ◽  
Author(s):  
HyunKi Lee ◽  
Caleb M. Harris ◽  
Jonathan C. Gladin ◽  
Dimitri N. Mavris
Keyword(s):  
Flight Path ◽  
Simultaneous Optimization ◽  
Electric Aircraft ◽  
Power Split ◽  
Hybrid Electric

scholarly journals Range Equation for Hybrid-Electric Aircraft with Constant Power Split

2020 ◽  
Vol 57 (3) ◽  
pp. 552-557 ◽  
Author(s):  
Reynard de Vries ◽  
Maurice F. M. Hoogreef ◽  
Roelof Vos
Keyword(s):  
Constant Power ◽  
Electric Aircraft ◽  
Power Split ◽  
Hybrid Electric ◽  
Range Equation

scholarly journals Design and Optimization of Ram Air-Based Thermal Management Systems for Hybrid-Electric Aircraft

Aerospace ◽  
2020 ◽  
Vol 8 (1) ◽  
pp. 3
Author(s):  
Hagen Kellermann ◽  
Michael Lüdemann ◽  
Markus Pohl ◽  
Mirko Hornung
Keyword(s):  
Thermal Management ◽  
Sensitivity Analyses ◽  
Management Systems ◽  
Dimensional System ◽  
System Sensitivity ◽  
Design And Optimization ◽  
Fuel Burn ◽  
Electric Aircraft ◽  
Power Split ◽  
Hybrid Electric

Ram air-based thermal management systems (TMS) are investigated herein for the cooling of future hybrid-electric aircraft. The developed TMS model consists of all components required to estimate the impacts of mass, drag, and fuel burn on the aircraft, including the heat exchangers, coldplates, ducts, pumps, and fans. To gain a better understanding of the TMS, one- and multi-dimensional system sensitivity analyses were conducted. The observations were used to aid with the numerical optimization of a ram air-based TMS towards the minimum fuel burn of a 180-passenger short-range turboelectric aircraft with a power split of up to 30% electric power. The TMS was designed for the conditions at the top of the climb. For an aircraft with the maximum power split, the additional fuel burn caused by the TMS is 0.19%. Conditions occurring at a hot-day takeoff represent the most challenging off-design conditions for TMS. Steady-state cooling of all electric components with the designed TMS is possible during a hot-day takeoff if a small puller fan is utilized. Omitting the puller fan and instead oversizing the TMS is an alternative, but the fuel burn increase on the aircraft level grows to 0.29%.

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