Exhaust Plume Behavior

Large vehicles, especially diesel engine trains, trucks, and ships, emit exhaust that can be dangerous to vehicle occupants and/or bystanders. The exhaust plume behavior depends on wind conditions, whether the vehicle is at idle or moving, and engine rpm. Airflow Sciences had conducted both CFD analysis and wind tunnel testing for these situations. The results help quantify exhaust flow patterns and concentration of gas components in the vicinity of the vehicle.

Locomotive Plume

1/15 Scale Wind Tunnel Model
Locomotive at 10º Yaw
Exhaust Plume Visualization

CFD Locomotive Plume

CFD Model of Diesel Locomotive
(contours of gas concentration)

CFD of Yacht

Velocity Patterns around an Anchored Ship
with Engine at Idle Setting