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In the article the most effective way to detect heat losses associated with loose-Stu walling. A method for use of aerodynamic and thermodynamic - cal research with the possibility of the use of rail transport.

The article focuses on the consideration of the issue of ensuring the safety of fine coals transported on open-top rolling stock in the matter of minimizing their losses due to blow-out. An aerodynamic model of the coal blow-out process during its transportation by open-top cars was created and studied in specialized software in the field of fluid dynamics research (CFD), which provided an opportunity to numerically estimate the size of coal losses from blow-out using data on the aerodynamic parameters of air flows flowing around the cargo surface. The study of the influence of train speed on the size of losses of fine coals from blowing was carried out by modeling the blowing process with varying train speeds from 20 to 140 km/h, which also allowed us to establish the speed of the beginning of the intensive blowing-out of small cargo particles - 40 km/h. This speed value is consistent with that obtained by scientists from the Siberian Transport University during mass experimental transportation of bulk cargo in the 60-70s of the last century, which indicates the adequacy of the results obtained during the modeling of the blowing process. The results of the study made it possible to estimate numerical dependences of the size of losses of coal fine particles due to blow-out from changes in train speed, which is important to consider when choosing coal-dust mitigation measures to reduce the size of losses from blow-out. Further refinement of the obtained dependencies for other fine-grained bulk cargo seems possible using the developed aerodynamic model of the blowing process, both by specifying the value of the critical blowing speed of an individual bulk cargo, and also due to the formation of the corresponding shape of the cargo surface, characteristic of a certain loading method and the parameters of the open-top car model, which affect the loading height, is an equally important factor determining the size of losses from blowing.

At present, the “Afrosiyob” high-speed passenger train runs on the Tashkent - Samarkand, Samarkand - Karshi, Samarkand - Bukhara sections. In the near future, it is planned to launch freight trains on sections of the Bukhara-Misken route. On high-speed double - track sections Tashkent - Samarkand, Samarkand-Navаi, the movement of freight trains is combined with passenger trains. Which, in turn, negatively affects the throughput of stations and hauls. In connection with this, the actual issue is the movement of freight trains on these sections. Additional research is needed to increase the capacity of sections where freight and high-speed passenger trains run. The article considers options for the aerodynamic interaction of freight and high - speed passenger trains moving in one or the opposite direction. At the same time, the idea of the safe organization of freight trains during the movement of high-speed passenger trains was put forward. As a result of this study, the possibilities of carrying cargo trains in one direction or in the opposite direction are determined by ensuring the safety of movement on two-way parcels in which high-speed “Afrosiyob” high - speed electric trains travel. This makes it possible to develop recommendations for more effective use of the ability of parcels to conduct trains. When calculating the aerodynamic interaction, scientific ideas put forward by scientists from Europe, the USA, Russia and other countries were analyzed. Methods for solving the Navier - Stokes equations using existing programming models are described.