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In article there are fluid flow mathematical models at the UV-sterilizer with concentric pipes installed in modernized water supply system of passenger car allowing to determine the velocity field of the rotational velocity component and assess the degree of attenuation depending on the chamber disinfection geometry, the inlet pressure in the water system, and fluid properties. There are exact solutions of the Navier-Stokes equations for a rotating fluid between fixed cylinder of infinite length and limited fictitious determined rotating lids provided Poiseuille axisymmetric flow. The decision explicitly contains the product of cylindrical Bessel functions and hyperbolic functions.

In the article there is the method of calculating the loss of water pressure in the water system of passenger cars, equipped with a cleaning system as a series of two filters installed and the flow of ultraviolet sterilizer screw design. There is the results of calculation of losses in the various water systems of cars with the maximum and minimum charging time and the water pressure in the water system station. The rational geometric parameters of the decontamination chamber flow ultraviolet sterilizer of the conditions to ensure complete filling of the tank car parking in the minimum time with minimum pressure of the water supply system of the station. The value of head loss does not exceed the nameplate values typical designs. The geometry of the sterilizer allows you to integrate the device into the car. Its design values are taken to develop the prototype of a UV sterilizer successfully tested. To be able to determine the loss of water pressure chamber decontamination sterilizer screw coil design is presented with a rectangular cross section, «wound» on the cylinder. Local loss of one turn calculated using the reference formula proposed by G.N. Abramovich.

The questions of the composition of the design and technology of smelting, casting and heat treatment of alloyed rail steels having high operational stability. Together specialists EVRAZ ZSMK Novokuznetsk and IrGUPS was proposed complex doping scheme of the rail steel and rail rolling floor EVRAZ ZSMK was conducted testing of the technology of smelting and eletropechnoy thermostrengthening superperlitnoy steel of high purity, which has high wear resistance. several experimental batches were produced rails, which are tested on the site of the saddle-point Irkutsk-Slyudyanka VSZHD with an unfavorable combination of operational loads, causing increased wear of the rails. The test results showed high wear resistance experienced rails and expediency of development of industrial production.