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題名 | Numerical Modeling of Erosion on the Metallic Plate by the Dilute Particulate Jet Flow Impact=稀薄之二相粒子流沖蝕現象之模擬 |
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作者 | 牛仰堯; 蔡智翔; | 書刊名 | 中國機械工程學刊 |
卷期 | 20:5 1999.10[民88.10] |
頁次 | 頁491-499 |
分類號 | 440.137 |
關鍵詞 | 二相粒子流; 沖蝕現象; Two phase flow; Erosion; Particle collision; Turbulence; |
語文 | 英文(English) |
中文摘要 | 在本研究中,發展一套Eulerian- Lagrangian數學運算模式來預測沖蝕粒子在 金屬壁面上所引起之沖蝕現象。根據 RNG k- ε紊流模上,將紊流擾動效應,沖蝕粒子與壁 面間及沖蝕粒子間之相互碰撞效應,于二相流之分析中例入考慮。對於紊流擴散效應、沖蝕 粒子尺寸及沖擊速度等因素對沖蝕現象之影響,以數值模擬的方式來分析,再配合實驗數據 來做比對。以此數值模式所預測之金屬表面沖蝕結果,較前人的模式來得更精確。 |
英文摘要 | In this study, the effects of turbulence intensity, particle sizes and impinging velocity on erosion by particle impact are demonstrated numerically. Turbulence fluid phenomena are described by Eulerian equations with a RNG k- ε turbulence model. The particle trajectories and particle-wall interactions are evaluated by a Lagrangian approach. An erosion model considering material weight removal from surfaces is used to predict erosive wear. Numerical validation with measured data reveal that the current study provides more accurate prediction of the erosion depth rate than the previous works. |
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