Trains in tunnels - a method for determining train nose stagnation pressure loss coefficients and train friction factors from the rise in stagnation pressure during tunnel entry (IM-AERO-091)

When a train enters a tunnel a rise in stagnation pressure is experienced ahead of the train nose. This rise in stagnation pressure may be measured using a pitot tube mounted on the train nose. The train nose stagnation pressure loss coefficient and train friction factor may be deduced directly...