Aero dynamic cross wind analysis of locomotive

Abstract

Aerodynamic cross wind has become most vital part in the approving process in locomotives. From last few decades, many of the incidents took place on the cross wind stability of locomotives during high speed. Even though a lot of research work is going on the cross wind analysis of locomotive by using computational fluid dynamics (CFD). In this paper Computational fluid dynamics simulation was used to carry out the study on WAP5 locomotive (Wide gauge AC Passenger, class 5 model) and the simulations were utilized to study the impact of the motion (relative) among locomotive and infrastructure, also the variance which happen in WT (wind tunnel). After an inceptive approval against test data, the numerical model was utilized to consider relative motion impacts among locomotive and infrastructure (STBR i.e. single track with ballast and rail). The variance, regarding coefficient of aerodynamics obtained with active and static model simulations, was investigated: the both rolling moment coefficient and lateral force were brought down with the static model of around 5% and the variance of around 12% for the coefficient vertical force. The other variations like CWC (characteristics wind curve), presents the limitation for overturning of locomotive was in the sequence of 1.5% for direction of locomotive that is perpendicular to wind. In the conclusion, regardless of whether stationary test is not conventional, the distinctions as far as characteristics wind curve are significantly less in the single track with ballast and rail situation and these outcomes carry assumptions of stationary model tests on single track with ballast and train situation as illustrative of aerodynamics of locomotive.