Скачать или смотреть Rail Diesel Exhaust Analysis for Legal Cases

Rail Diesel Exhaust Analysis for Legal Cases A short video featuring Dr. Kevin Linfield, P.E.

This video is brought to you by Airflow Sciences Corporation. For all your flow modeling and testing needs, since 1975.

As of 2021, Airflow Sciences has consulted on eleven legal cases where the train operators’ exposure to diesel exhaust was evaluated. These cases involve many parameters, including switch yard and trunk routes, different locomotive models, variable speeds and directions for both the wind and the train, as well as the orientation of the locomotive

In order to determine the diesel exhaust plume concentration within a locomotive cab, a complex array of information and parameters needs to be gathered and analyzed, as detailed in this project flow chart. With the end goal of performing computational fluid dynamic modeling or wind tunnel testing to calculate the exhaust level at the open window on the leeward side of the subject locomotive, results of the models help arm our clients with the data, visuals, and expert testimony they need.

Effects of the wind and the moving train can often create a flow pattern near a locomotive’s cab where the exhaust plume recirculates instead of dispersing. Since locomotives may operate with open windows, the operator could therefore be subject to these exhaust fumes. This can happen during line-haul operations but also in the switch yard. This CFD image shows the diesel exhaust from two locomotives: one with the long hood forward and the other with the short hood forward.

Wind tunnel testing of scale locomotives at a variety of wind speeds and directions feature a complex system to simulate the exhausts. ASC has built a database of various locomotives under multiple test conditions and have used this data and our CFD results for expert testimony reports.

Clients choose Airflow Science as exhaust legal experts because of our wealth of experience. We have conducted over 50 studies on rail aerodynamics that include computer simulation, wind tunnel testing of scale models, and even full-scale, over-the-track tests. ASC has performed numerous studies to calculate diesel exhaust concentrations in the vicinity of locomotive cabs since 1984, and have been awarded six patents in the rail industry.

For more information on diesel exhaust concentration studies for the rail and legal industries, please visit www.airflowsciences.com

Thank you, and have a wonderful day.

Copyright Airflow Sciences Corporation. With contributions by Kelly Hile and Dr. Kevin Linfield, P.Eng., P.E.