Analysis and Optimization of Flow and Heat Transfer of Cooling Water Jacket of Off-Road Diesel Engine
The cooling water jacket is the core structure of the diesel engine,and its flow and heat transfer characteristics directly af-fect the reliability and service life of the diesel engine.Taking a two-cylinder high-pressure common rail diesel engine as the re-search object,in order to understand the flow and heat transfer performance of the engine cooling water jacket,the space distribution parameters such as the water jacket velocity field,temperature field,and heat transfer coefficient are used as criteria,focus on the analysis of the flow and heat transfer characteristics in the key areas of the cooling water jacket,and propose an optimization plan.The simulation results show that the overall coolant fluidity of the engine is poor,and the average flow velocity is less than 0.5m/s,there is a dead zone in the upper part of the cooling water jacket on the intake side of the cylinder block;by optimizing the perfor-mance parameters of the cooling system and the structure of the cooling water jacket,the pressure loss at the inlet and outlet of the cooling water jacket is reduced,and the overall average flow rate of the coolant is increased by 173.91%compared with the original plan,the overall average heat transfer coefficient is increased by 41.93%compared with the original plan,and the flow uniformity of the overall cooling water jacket is improved.
High Pressure Common Rail Diesel EngineCooling Water JacketOptimizationFlow CharacteristicsSimulation Analysis
万方数据
维普
