Train Aerodynamics

Index

Note: ‘Page numbers followed by “f” indicate figures and “t” indicate tables.’

A

Active devices, 44

Aerodynamic drag

breakdown, 131, 131f

CFD calculations, 137–138

CFD modelling, 130–131

coefficient, 130–132, 141–146

collation, 141–146, 142t–144t

crosswinds, 139, 139f

Davis equation, 129–130

deceleration/velocity curve, 134f

determination, 133–138

drag reduction methods, 146–149

full-scale coasting tests, 133–135

low-speed hauling test, 134

predictive formulae, 139–141

reduction and optimisation, 133

Reynolds' number, 137

specification of, 129–133

Air quality, 307

Airshafts, 284–287, 284f, 286f

Alleviation, tunnel, 283–291

adjustment of train speed, 283–284

airshafts, 284–287, 284f, 286f

cross-passages, 287

modification of tunnel area, 283

portal design, 289–291