# Aerodynamics Made Easy - eVTOL CFD Analysis Explained | Step-by-Step Guide

#### Aerodynamics Made Easy - eVTOL CFD Analysis Explained | Step-by-Step Guide

Sample project: https://app.airshaper.com/simulations/archer-midnight-public-3d-model-hover More information: https://www.airshaper.com or info@airshaper.com In this video is a step by step explanation of how to use CFD simulations to analyze the aerodynamics of a drone. We used a public 3D model of the Archer Midnight - very inaccurate but great to show the process of a CFD simulation. ---Setup--- The AirShaper platform was used to set up the simulation. The eVTOL was leveled (no angle of attack) and a rotational speed has been added to the propellers. ---Results--- - Pressure clouds (iso-surface for the total pressure coefficient of 0): These illustrate where energy losses are high. This highlights the shape and swirl generated by the propellers, for example. - Pressure map: this one illustrates the pressure perpendicular to the surface. The scale has been tuned to see the pressure effect on the tips of the propellers. - Friction map: this one shows the magnitude of the friction force of the air flowing parallel to the surface. When low, this can indicate either stagnation of the flow separation of the flow. The surface streamlines indicate how the air moves across the surface. - 3D streamlines: these show how the air flows around the airframe, the support beams, through the propeller area, etc. - Noise: this is an estimation of the sources of wind noise. As this is a steady stage RANS simulation, it is just an approximation based on the turbulent kinetic energy. - Elements: the flow lines through the propellers are visualized. Also, the torque, power and thrust on the propellers can be analyzed by integrating the pressure & friction forces across their surface. - Forces: the forces on each individual element are calculated.