In total we have 1,7 milj elements in this model. In our mesh setup we have applied a three-stage boundary layer that captures the boundary-layer effect and ground effect. After that we have modelled the ground and positioned the motorcycle tyres tangent to the ground. the computational domain is created on a symmetric way, and we have expanded the length of the computational domain long enough to capture the vortex behaviour behind the motorcycle and drive and to prevent calculation errors. We have set-up an analysis of an external flow applying air velocity of 100 km/h.
DRAG COEFFICIENT SOFTWARE
Unfortunately, 3D-CAD software doesn’t have an automatic way of getting the frontal surface area (cross-section doesn’t work in this case) so we used a slight workaround. Cw = Air-resistance valueĪ = Frontal surface in m2The frontal surface area, is the surface area in m2 that represents the front view of motorcycle including driver. The formula for Cw-value F = 0,5 x ρ x v² x Cw x Aį = is the force on the motorbike + driver, in N (Newton) opposite to the riding direction. With these values, STORM can estimate the current performance of the given shape for future improvements. The goals of these simulations are to investigate the Dragforce and Drag Coefficient at given speed of 100 km/h. The wheels are standing still (not rotating), and the ground is modelled to capture ground effect. The boundary conditions for the CFD study?Īir is flowing with a speed of 100 km/hour applied as an external flow. For the purpose of this blog we will take you along the way.
DRAG COEFFICIENT HOW TO
Based on our experience from another motorcycle racingteam called novabike, we already determined in the past how to set these type of analysis up. This resulted in a 3D-CAD file which they provided to us in order to start our explorations. How do we approach this?įor this typical project we started by instructing the STORMEindhoven team how the design should be simplified in order to carry out the actual aerodynamics study. The goal for this team is to travel around the world in 80-days, so the more energy they can spare by providing insight in the current aerodynamics, the airresistance and the dragforce, the further they can drive without changing their battery packs, or drive the same distance but spare the life of the battery packs. In this project it is all about setting up a simulation which determines the amount of Dragforce and the Drag Coefficient for this unique electric motorcycle. This article focuses on our experience gained in CFD consultancy, by running a project for STORMEindhoven, the first electric Touring Motorcycle that will drive around the world in 80-days, to improve the drag coefficient in order to expand the electric vehicles driving range.Īs with most of the projects we do within Simuleon, there is always a clear reason why customers ask us to perform a simulation.
0 kommentar(er)
