Characteristic analysis of sand phase distribution inside internal combustion locomotives under wind and sand conditions
In order to investigate the situation of sands entering a carriage and the distribution of sands inside the carriage when the United Arab Emirates(UAE)locomotive is running at 200 km/h in the local sandy environment under different cross-wind conditions,the computational fluid dynamics software STAR-CCM+is used to numerically simulate the UAE locomotive.The simulation uses a sand particle size of 0.01 mm to obtain the flow of sand particles inside the locomotive.Calculations show that the pressure and velocity of the flow field inside the carriage increase when the locomotive is operated in a sandy environment;the amount of sands entering the carriage with the sand flow decreases with the increase of the cross-wind speed,and due to the difference of the incidence angle,the amount of sands entering the carriage at a wind speed of 15 m/s is slightly less than other operating conditions.Sands accumulate in the carriage,mainly at the engine,diesel engine and brake cylinders,all near the cooling chamber,so attention should be paid to the protection of these devices during locomotive operation,and in order to target the protection of the devices,attempts can be made to change the position of the cooling chamber design to reduce the accumulation.
locomotiveswind and sandflow fieldsaerodynamicscrosswinds
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