Practical method to estimate drag in 30 to 40 km long submarine tunnel; series of measurements of static pressure difference occurring in front and in rear of train running in particular tunnel were carried out to express aerodynamic drag in terms of friction force along train surface which is related to this pressure difference; equation to determine static pressure difference is derived.
Estimation of aerodynamic drag of train in long tunnel
Tokyo. Ry Tech Research Inst -- Quarterly Report
1967
4 pages
Report
Englisch
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Comment on aerodynamic drag of train in tunnel
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