The paper describes a practical method of calculating the aerodynamic effects of trains passing through interconnected tunnel systems so that these can be designed for acceptable pressure pulse levels, air velocities and train drag. The equations of unsteady compressible flow were developed into a form suitable for solving by the Method of Characteristics on a computer. Results obtained were compared with measurements taken on models and in real tunnels and some of the comparisons are shown and discussed.
Get full access to this article
View all access options for this article.
References
1.
FoxJ. A.HensonD. A.‘The prediction of the magnitude of pressure transients generated by a train entering a single tunnel’, Proc. Instn civ. Engrs197149, 53–69.
2.
HensonD. A.‘An investigation of the transient flows in tunnel complexes of the type proposed for the channel tunnel’, University of Leeds Report, October 1971.
3.
CourantR.FriedrichsK. O.Supersonic flow and shock waves1948 (Interscience Publishers Inc., New York).
4.
EarnshawP. B.‘On the aerodynamic resistance to long trains passing through long close-fitting tunnels’, Royal Aircraft Establishment, Farnborough, Technical Report No. 71099, 1970.
MyringD. F.‘Measurement of transient pressures produced by a moving train’, British Rail Research Dept, Advanced Projects Division Internal Memorandum, I.M.P.S. 42A, 1970.
7.
Société National des Chemins de Fer Résistances à l'avancement des trains en tunnel—mesures effectuées au Simplon Ig 42, 129 (Paris).
