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題 名 | Solidification Modeling of Complex-Shaped Single Crystal Turbine Airfoils=複形單晶透平機葉片之固化模擬 |
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作 者 | 余光鄂; | 書刊名 | 材料科學 |
卷 期 | 25:1 1993.03[民82.03] |
頁 次 | 頁60-71 |
分類號 | 440.34 |
關鍵詞 | 固化; 透平機; 葉片; 模擬; 複形單晶; |
語 文 | 英文(English) |
中文摘要 | 單晶透平機葉片之品質依其鑄造結構及內在缺陷而定。因此,PCC Airboils與GE Aircraft Engines合作,在一由美國空軍支持之Manufcturing Technology(簡稱MANTECH)計劃中,發展出由葉片之固化情況而預測其鑄造結構 及內在缺陷之技術。所採用的方式是結合有限元素之熱流分析及鑄件之實驗結果 而建立預測關係。首先,由簡單圓柱形鑄件之實驗結果及有限元素分析所計算之 固化狀況間之相互關係而建立鑄件之內在缺陷預測圖。然後,再由有限元素熱流 分析來計算複雜形狀單晶葉片之固化狀況並依上述之內在缺陷預測圖而預測各 葉片之鑄造結構及內在缺陷。結果顯示,此方式能有效的預測複形單晶葉片之鑄 造結構,內在缺陷及化學成份之變化。 |
英文摘要 | Single crystal turbine airfoils casting integrity depends on structures as well as inherent defects. PCC Airfoils, in conjunction with the Air Force MANTECH program and GE Aircraft Engines (GEAE),correlated the solidification conditions to the microstructures and defects of single crystal castings. The approach combined finite-element thermal analysis and experimental results. Simple-shaped cylinders were first cast and modeled to establish a defects prediction map. Solidification conditions of complex-shaped airfoils were then modeled, to predict the evolution of casting microstructures as well as the occurrence of casting defects by using the pre-established defects map. Comparison of model predictions with experimental inspection results show that finite-element modeling is an effective tool for understanding the solidification sequence and predicting the microstructure, defects and chemistry variation of investmentcast, complex-shaped, single crystal turbine airfoils. |
本系統中英文摘要資訊取自各篇刊載內容。