Calculation And Analysis Of Temperature Field Of Diesel Engine In Diesel Engine

With the acceleration of high speed and heavy load process,further design and development.The advantage of energy conservation and emission reduction of internal combustion locomotives is the research direction of green and environmental protection locomotives.Among them,the environmental temperature of locomotive power room seriously affects the reliability and safety of locomotives,so it is necessary to design the ventilation and heat dissipation structure of locomotive power room reasonably.The diesel locomotive is the diesel locomotive where the diesel-generator unit is located in the middle of the diesel locomotive,which is one of the most important parts of the locomotive.In addition to the main equipment,there are other electrical equipment throughout the diesel locomotive.These work pieces are located in a space where the heat generated inside the power chamber exceeds the standard value,the main heat source is diesel engine and generator set.They produce about 35-45% of the heat at work that can be converted into an effective attack,while a large part of the remaining heat is directly discharged from the diesel engine.This paper studies the internal aisle of Dongfeng 4B internal combustion locomotive,and analyzes the temperature field and other flow field performance of the whole space at different operating speeds according to the characteristics of internal air flow.First,we used 3D modeling software Creo to model the internal combustion locomotive.In order to simplify the ICEPAK software for thermodynamic analysis,the turbulence equation selected K-εequation for numerical simulation,the flow field parameters found that the internal temperature of the power chamber was up to 80℃,which does not meet the design requirements,so the power room structure was optimized and the simulation calculation again.The optimization scheme includes increasing the number of vents,using the fan method to increase the air replacement inside the power room and outside the locomotive.The calculated and optimized scheme reduces 28℃ than the original scheme to achieve the cooling effect.According to the temperature field data can be analyzed,accelerate the speed of air flow and optimize the turbulence performance of the fluid are effective improvement measures.