This is considered as one of the most important industry that grows steadily and rapidly. Reducing drag. Hello, I have a bus geometry (in original size).

I think, the mesh is quite fine, the y plus is 20-100. F d = drag force (N) c d = drag coefficient. Roland Rakos. I made a simulation to investigate the drag coefficient. The reduction of drag in road vehicles has led to increases in the top … Posts: 131 Rep Power: 13.

But based on result, the drag force is very low. ρ = density of fluid (1.2 kg/m 3 for air at NTP) v = flow velocity (m/s) A = characteristic frontal area of the body (m 2) The drag coefficient is a function of several parameters like shape of the body, Reynolds Number for the flow, Froude number, Mach Number and Roughness of the Surface. drag of trucks and buses their final model equipped with rounded horizontal and vertical corners, smoothed under body and a boat tail achieved the required drag coefficient. Numerical methods can be used to determine the pressure drag coefficient and the skin friction drag coefficient at the various points of a body and then sum them up to the overall drag coefficient. There are many Daimler-owned Setra has taken the wraps off the S 531 DT double-decker bus featuring a low drag coefficient of just 0.35, a new benchmark for the segment. Public transportation is one of the most important ways of transport in our life. In most cases, however, it is not necessary to determine the local drag coefficients in such a complicated way, since in practice only the (overall) drag of a body is relevant anyway. Too low drag coefficient on a bus #1: Roland R. Senior Member . Buses are important part of a man’s transportation system. Join Date: Mar 2009. I made analytical calculation where the force is ~ 1800N … In this study, aerodynamic drag coefficient of 1/64 scaled bus model was determined by the Computational Fluid Dynamics (CFD) method. The NASA Dryden Flight Research Center test van, a box-shaped ground vehicle with a truncated boat tail after body, has achieved an aerodynamic drag coefficient of 0.242. Flow analyzes were performed at …