Abstract
As a key component of electric aircrafts, electric propulsion systems provide sufficient thrust for electric aircrafts. By improving its efficiency, the power consumed by the electric propulsion system can be reduced. Therefore, the maximum range of electric aircrafts, which is limited by the energy density of batteries, can be further increased. Upon investigating the power demand and the energy consumption of the electric propulsion system in each flight profile phase of fixed pitch propellers electric aircrafts, this paper proposes a novel energy efficiency optimization method tailored for fixed pitch propeller electric aircrafts by minimizing the total energy consumption of one flight over the maximum efficiency of the propeller. The proposed method is adopted to the design of a fixed pitch propeller electric aircraft. Experimental results suggest that the tested fixed propeller electric aircraft designed can achieve better energy efficiency while reducing energy consumption by more than 10%.
Highlights
Electric aircrafts are powered by rechargeable batteries and driven by electric propulsion systems instead of internal combustion engine
Wang et al.: Energy Efficiency Optimization Method for Fixed Pitch Propeller Electric Aircraft Propulsion Systems where λ is the advance ratio of the propeller, CT is the thrust coefficient, CW is the power coefficient, Rpr is the diameter of the propeller, ns is the rotational speed of the propeller, T is the thrust of the propeller, vfl is the flow velocity, W is the input power, Q is the torque of the propeller
EFFICIENCY OPTIMIZATION FOR ELECTRIC PROPULSION SYSTEMS To reduce the energy consumption of the propulsion system and increase its efficiency, this paper presents an optimization method that coordinates each components of the propulsion system to improve its output efficiency
Summary
Electric aircrafts are powered by rechargeable batteries and driven by electric propulsion systems instead of internal combustion engine. S. Wang et al.: An Energy Efficiency Optimization Method for Fixed Pitch Propeller Electric Aircraft Propulsion Systems This paper investigates the power demand of lightweight aircrafts during different phases of the flight profile and presents a method to minimize energy consumption by optimizing the peak efficiency operating point of the propeller.
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