摘要
为进一步研究高功率密度柴油发动机缸盖材料的导热性能.本文基于金相和X射线三维扫描重构技术,构建了蠕墨铸铁二维和三维有限元导热模型,采用有限元软件ANSYS仿真计算了不同蠕化率蠕墨铸铁的导热性能.计算结果表明:不考虑界面和石墨导热各向异性,蠕铁的导热性能随着蠕化率的升高而增大,三维模型计算蠕化率40%的蠕铁导热性能较二维模型高出约7.4%,石墨连通性对铸铁导热性能有促进作用.
A further study was made of the thermal conductivity of the materials used for the cylinder head of the high power density diesel engine. A two-dimensional and a three-dimensional finite element models for thermal conductivity of vermieular graphite cast iron were respectively built based on metallographie photo and X-ray computed tomography. The thermal conductivity of the vermieular graphite cast iron with different vermicularity was determined by using ANSYS finite element software. The results indicate that the thermal conductivity of vermicular graphite cast iron becomes higher as the vermicularity increases without regard tO the interface and anisotro conductivity of vermicular graphite cast iron with 40% vermicularity ob model is 7. 4% higher than that obtained by the three-dimensional connectivity of graphite in cast iron can improve its thermal conductivity. py of graphite. The thermal tained by the two-dimensional model. It is proved that the
出处
《西安工业大学学报》
CAS
2016年第7期522-527,共6页
Journal of Xi’an Technological University
基金
国家自然基金项目(51401155)
重大科技成果转化引导专项(2013TKCG01-04)
西安工业大学校长基金重点项目(XAGDXJJ15007)
关键词
蠕墨铸铁
蠕化率
X射线三维扫描
石墨
vermicular graphite cast iron
vermicularity
X-ray computed tomography
graphite
