摘要
由于冲击射流流场较为复杂,为准确描述其流动和换热过程,需要选择合适的湍流模型和壁面函数.分别采用κ-ε模型(Standard,RNG和Realizable)、κ-ω模型(Standard和SST)和低雷诺数模型(AB,AKN,CHC,YS,LB,LS和YS)进行对比计算.对于壁面区域,考察了标准壁面函数、尺度化壁面函数、非平衡壁面函数和增强型壁面函数的影响.探讨了速度场和湍动能场的分布规律,获得了与实验一致的结果,为今后活塞底部喷油冷却的数值模拟提供基础.
In the process of engine working, bottom injecting cooling can effectively reduce the piston temperature. Due to the complex flow field of jet impinging, an appropriate turbulence model and wall function must be utilized to describe the flow and heat transfer process. The κ-ε model （Standard, RNG and Realizable）, κ-ω model （Standard and SST） and low Reynolds number model （AB, AKN, CHC, YS, LB, LS and YS） were calculated and compared. The effects of the standard, scalable, non equilibrium and enhanced wall functions were analyzed for the wall region. Distribution law of the velocity and turbulent kinetic energy field were discussed, which are in accordance with the experiments. These results provide a basis for future numerical simulation of ejecting oil cooling at piston bottom.
出处
《东北大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2016年第5期692-696,共5页
Journal of Northeastern University(Natural Science)
基金
国家自然科学基金资助项目(51376002
51276031
51476019)
辽宁省教育厅资助项目(L2012164)
关键词
震荡冷却油腔
冲击射流
多相流
湍流模型
壁面函数
oscillating-oil-cooling channel
jet impingement
multiphase flow
turbulence model
wall function
