On icing of railway rolling stock under operating conditions of Northern Latitudinal Railway
Study of the mechanism of forming compacted snow masses deposits on the surfaces of the undercar space and undercarriage of the rolling stock, study of forming microclimatic conditions in the niches of the undercarriage due to the interaction of air masses of the incoming fl ow with convective fl ows formed during the operation of the brake equipment. Methods: Solid models in the SolidWorks software package are developed, CFD analysis is implemented by the fi nite volume method in the FlowSimulation module based on the numerical solution of the Navier-Stokes equations. Results: By means of numerical modeling, the presence of a centrifugal-transverse zone of the fl uid behind the surface of the wheel rim was established, as a result of which drops are carried out in the radial direction, adhering to the metal parts of the undercar space, creating a white type of ice formations that can increase in size due to the braking process. To redirect the fl ow containing snow inclusions, a defl ector device is proposed. Diagrams of temperature fi elds in the plane of the bogie brake discs were obtained with and without a defl ector, a comparative analysis was carried out, and a conclusion was made about the necessity of using the device. Practical importance: The performed numerical modeling made it possible to visually demonstrate the main zones of the ice build-up formation on the undercarriage of a moving rolling stock and to identify a variant of controlling the dimensions of these areas using the proposed device of a mechanical defl ector.