Airborne wind energy based on the Magnus effect

First, we need to determine the lift and the drag coefficient. This is done use a polynomial approximation as suggested in [1].

You can plot the result with

include("src/magnus.jl")

Suggested:

• length 2m
• radius 0.2m

--> area 0.8 m²

• l = 200 m
• v_wind_gnd = 6.0 m/s

2D simulation

• volume ~ 0.25 m³
• buoyancy ~ 0.26 kg
• price for helium ~ 0.15 EUR/l

• implement calc_force in 2D for dynamic simulation

[1] Milan Milutinović, Mirko Čorić, Joško Deur, Operating cycle optimization for a Magnus effect-based airborne wind energy system, Energy Conversion and Management, Volume 90, 2015

[2] Yashank Gupta. Magnus Based Airborne Wind Energy Systems. Automatic. Université Grenoble Alpes, 2018. English. NNT : 2018GREAT094. tel-02113723v2

[3] Eduardo Schmidt, Yashank Gupta, Jonathan Dumon, Ahmad Hably. In-flight estimation of the aerodynamic characteristics of a Magnus effect-based airborne wind energy system. REDEC 2018 - International Conference on Renewable Energies for Developing countries (REDEC 2018), Nov 2018, Beyrouth, Lebanon. 10.1109/REDEC.2018.8598022. hal-01895342