第35卷(2013)第1期性能与排放
柴油机 Diesel Engine
Vol.35(2013)No. 1
某中速柴油机冷却液流动及流固耦合传热计算分析
周慎，薛冬新"，唐斌，孟浩”
（1.大连理工大学内燃机研究所，辽宁大连116024； 2.中国北车集团大连机车车辆有限公司，辽宁大连116022）
摘要：为获得直观的流场和温度场数据，对某16缸中速柴油机建立了完整的冷却水三维模型，采用FLUENT流体计算软件对其进行了绝热CFD计算分析，得到了冷却水流速、压力等数据。考虑到各缸冷却水套为并列排布方式，各缸之间相对独立，建立了单缸的缸盖-缸套-冷却水耦合传热模型，对其进行了红盖-缸套-冷却水耦合传热仿真，获得了各部件比较精确直观的温度场分布。结果表明：仿真结果与实测数据吻合较好，从而为荣油机冷却水套的优化设计提供了依据。关键调：中速柴油机；冷却水系统；CFD分析；传热；仿真
中图分类号：TK424.2
文献标识码：A
文章编号：10014357(2013)01-0017-05
The Flow and Fluid-Solid Coupled Heat Transfer Analysis
of a Medium Speed Diesel Engine Cooling System
Zhou Zhen', Xue Dongxin', Tang Bin', Meng Hao”
( 1. Intemal Combustion Engine Research Institute, Dalian University of Technology , Liaoning Dalian 116024;
2. Dalian Locomotive & Rolling Stock Co. Lid. , CNR, Liaoning Dalian 116022)
Abstract: In order to obtain a visual flow and temperature field data, a complete three-dimensional mod-el of a 16-cylinder medium-speed diesel engine cooling water system was established. Then analysis of the CFD calculation for the cooling water system was performed using calculation software FLUENT and the jacket cooling water flow rate and pressure data was obtained. Taking into account the cylinder cooling water jacket were side-by-side installed, and each cylinder was relatively independent, the cylinder head-cylinder liner-cooling water coupled heat transfer model of a single cylinder was established, and coupled heat transfer simulation for the model was performed, thereafter obtain more precise and visual tempera-ture field distribution of the individual parts. The results showed that the simulation results agree well with the measured data and thus provided the basis for optimization design of the diesel engine cooling wa ter jacket.
Keywords: medium-speed engine; cooling water system; CFD analysis; heat transfer; simulation
0引言
随着社会的发展，人们对发动机的经济型和动力性提出了更高的要求。高增压、高压缩比技术成为未来发动机发展趋势；发动机的强度不断提升，因发动机热负荷引起的失效风险也越来越高。因
此，为保证发动机的正常工作，发动机各受热零部件的冷却变得至关重要"]。未来发动机的冷却将向“高温冷却”和“精确冷却”方向发展(2)，这就要求发动机冷却水套的设计更为合理。
目前，采用流固耦合的方法对内燃机传热进行模拟研究越来越多。流固耦合方法可以将流固接触
收稿日期：2006-00-00；修回日期：2012-09-21
作者篇介：周慎，男(1986-）。在读顾士，研究方向：内燃机冷卸及报动噪声控制，E-mail：zheaben0746@yahoo.comcm。