船用柴油机冷却系统仿真分析研究

Simulation Analysis Study on the Cooling Water System of Marine Diesel Engine

以某船用中速柴油机冷却系统为研究对象,开展了一维与三维CFD相结合的仿真分析,并通过试验数据验证了计算方法的可行性;利用该方法对原机冷却系统性能进行了综合分析,优化了机带高、低温淡水泵的流量和压头;通过全工况范围冷却系统性能计算分析,验证了优化后冷却系统性能得到明显改善。

Based on the study of a marine medium speed diesel engine＇ s cooling water system, the 1-D and 3-D CFD co-simulation was carried out on the cooling characteristics. Comparing the calculation results with the experimental data, the simulation model＇ s accuracy was approved. Using the method, comprehensive analysis was carried out to optimize the engine driven high and low temperature fresh water pumps on their flow rate and pressure head. Simulation results show that the new cooling system＇ s performance has been obviously improved at all operating conditions.