Aerodynamic Characteristics Test for Two Kinds of Propeller with Different Blade Angle

Xiang, Song; Yang, Kang; Zhao, Wenguang

doi:10.12783/dtetr/amee2018/25350

Cited by 1 publication

(1 citation statement)

References 6 publications

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“…When finalizing the propeller airfoil configuration and number of blades, the efficient working speed of the propeller can be adjusted by changing the pitch angle to fine tune its efficiency. If the pitch angle is too small, the angle of attack is also too small, as are the thrust and effective power generated by the propeller, and the efficiency is extremely low [22]; in contrast, if the pitch angle is too large, the resistance generated by the rotation of the propeller is high and the efficiency of the propeller is extremely low. The efficiency curve of the propeller for a two-seat electric seaplane at different pitch angles, obtained through simulation, is shown in Figure 4 according to the incoming flow speed and can be calculated as [23]:…”

Section: B Propeller Design and Performance Analysismentioning

confidence: 99%

An Optimization Method for Improving Efficiency of Electric Propulsion System of Electric Seaplane

et al. 2023

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The takeoff process of a seaplane is different from that of a conventional land-based plane owing to the influence of hydrostatic, hydrodynamic, and aerodynamic forces. As a result, more energy will be consumed by the electric propulsion unit (EPU) of a seaplane during takeoff. Given the limited energy density of contemporary batteries, the energy consumed by the seaplane during its flight mission profile was minimized in this study by improving the efficiency of the EPU using a proposed optimization method. To meet the performance requirements of the seaplane EPU, the pitch angle of the propeller was taken as the optimization variable and the system loss was mathematically modeled. The performance of the EPU was thereby optimized, its consumption during flight was reduced, and the seaplane endurance was increased accordingly. The proposed optimization method was subsequently verified using a prototype test of a twoseat electric seaplane. The results show that the proposed method can reduce the energy consumption of the EPU by more than 5% during a single flight. INDEX TERMSElectric seaplane, electric propulsion unit (EPU), energy efficiency optimization, prototype test. NOMENCLATURE ρ Air density. C T Propeller thrust coefficient. β Propeller power coefficient. S Wing area. C D Aerodynamic drag coefficient. C L Aerodynamic lift coefficient of the aircraft. c r Water friction resistance coefficient. ρ w Water density. B Float width. N P Number of floats. EPU Electric propulsion unit. θ Pitch angle.The associate editor coordinating the review of this manuscript and approving it for publication was Adamu Murtala Zungeru .

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Section: B Propeller Design and Performance Analysismentioning

confidence: 99%