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Numerical Simulation of Microstructure Evolution during Directional Solidification Process in DS Turbine Blades
| 题名： | Numerical Simulation of Microstructure Evolution during Directional Solidification Process in DS Turbine Blades |
| 正文语种： | 中文 |
| 作者： | Hang ZHANG |
| 作者单位： | Key Laboratory for dvanced Materials Processing Technology,Ministry of Education, epartment of Mechanical Engineering,Tsinghua University,Beijing 100084, hina |
| 关键词： | CA Microstructure Evolution Numerical Modeling and Simulation DS Turbine Blade |
| 摘要： | Directional solidified (DS) turbine blades are widely used in advanced gas turbine engine.The size and orientation of columnar grains have great influence on the high temperature property and performance of the turbine blade.Numerical simulation of the directional solidification process is an effective way to investigate the grain's growth and morphology, and hence to optimize the process.In this paper, a mathematical model was presented to study the directional solidified microstructures at different withdrawal rates.By using a Modified Cellular Automation (MCA) method and a simple linear interpolation method, the mushy zone and the microstrueture evolution were studied in detail.Experimental validations were carded out at different withdrawal rates.It is indicated that the withdrawal rate affects the temperature distribution and growth rate of the grain directly, which determines the final size and morphology of the columnar grain.A moderate withdrawal rate can lead to high quality DS turbine blades for industrial application. |
| 会议日期： | 201111 |
| 会议举办地点： | 北京 |
| 会议名称： | 2011年全国博士生学术论坛——交通运输工程 |
| 出版日期： | 2011-10-31 |
| 母体文献： | 2011年全国博士生学术论坛——交通运输工程论文集 |
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