Research On The Temperature Field Of The Exhaust Side Of An Engine

Engine exhaust system is the main source of heat radiation in engine room. And the engine of miniaturization, light weight, power density increase, has become the development trend of the car. The use of Downsizing technology and supercharger technology of the engine, make the engine exhaust side heat load increasing. The thermal protection of the engine body parts is becoming more and more serious. To solve the problem of the temperature field, the longer the period. And the cost will be greater. The only way resolved the problem of overheating is through traditional vehicle underhood temperature field test in the late stage of engine and vehicle development, long period and high cost. In this paper, the simulation and test method of the temperature field of the engine exhaust side of the engine are studied.This paper summarizes the current domestic and foreign vehicle cabin temperature field simulation method. Fast engine simulation method of temperature field was established.on the basis of this, combined with the front of the cabin temperature field the worst of the vehicle condition and the external environment. Shorten the simulation period from two months to two weeks. At the same time, the optimization of the engine temperature field is advanced to the model design stage, and it can avoid the problem of the temperature field in the development of the whole vehicle.In order to verify the accuracy of the simulation results of the engine temperature field, the temperature field test method of the engine bench is established. The test method is to test the temperature of the heat source and the protective parts in different engine load, rotating speed, cooling water temperature, ambient temperature and air flow in the engine bench. And combined with the vehicle temperature field test results.Temperature field simulation of the engine can be calibrated and optimized. Improve simulation accuracy. And the simulation calculation can guide the problem of engine temperature field. If the problem of temperature field is solved completely, the temperature field tests of the engine are needed to be carried out according to the simulation calculation.In this paper, the method of combining the temperature field simulation of the engine and the engine bench is used. Solve the problem of temperature field of engine body. At the same time in advance to avoid the problem of vehicle cabin temperature. Reduce the cycle and cost of solving vehicle project development in the temperature field problem Fill the blank of enterprise vehicle thermal management simulation on the engine optimization calculation of the temperature field test method...