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題名 | Development of a Modified k-ξ Turbulence Model For Confined Swirling Jets=漩渦內流場中k-ξ修正模式之發展 |
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作者姓名(中文) | 陳慶順; 張克勤; | 書刊名 | 力學 |
卷期 | 9:1 1993.03[民82.03] |
頁次 | 頁9-15 |
分類號 | 440.137 |
關鍵詞 | 流場; 漩渦內; 紊流; 螺旋流動; Turbulence; Swirling recirculating flow; |
語文 | 英文(English) |
中文摘要 | 延續先前於無漩渦突張式流場中發展出之混合式k-ε紊流模式[1],在本研究中加 以延伸並發展出適用於漩渦內流場之修正模式。 利用對 C �祕瓞{非等向之效應加以混合式 的修正,此模式於突張漩渦流場中可獲得相當程度的改善。而在同軸突張漩渦流場的模擬分 析,因所選用案例之中心迴流區( CTRZ )縮減,導致此修正模式的優越性被降低許多,尚 待做進一步之測試。 |
英文摘要 | This study proposes an extended K-ε model dealt with the modification of anisotropic effects in the standard K- ε model for the numerical simulation of isothermal, confined swirling jets. Using the hybrid technique based upon our previous study [1] for the correction of anisotropic effects in C ��, the improved predictions in the numerical simulation of flow through pipe expansion with moderate swirl levels can be obtained in this work. The proposed model, however, becomes unclear in the simulation of confined, coaxial swirling flow with the diminished correction region because the central toroidal recirculation zone is shortened. |
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