On the Aerodynamic Problems of the High Speed Train

Abstract

At high speed of train operation the air resistance dominates over the other elements of running resistance and additionally arise various aerodynamic problems to be considered. The authors established through a model test in the wind tunnel that streamlining of the head and complete coverage of the gap at connections of cars with outer diaphragms could substantially cut the air resistance ; and proved that the wind tunnel test results would in general be applicable to real cars designed on these test results. Reference is also made to the test results on a spoiler type air drag brake and the air force characteristics of a train exposed to side winds.