P5_2 Fluid Dynamics of a Near Supersonic Train

Sabahuddin Humayun, Francis Davies, Ben Woodward


This paper investigates the effect on wind behaviour of allowing the trains of the London underground to accelerate to near super-sonic speeds i.e. Mach 0.9. The paper calculates the magnitude of the piston effect of a deep underground train arriving at a platform on a human and finds this value to be 67.7N of constant force.

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