| 祖珊珊， 王治云， 杨 茉.突扩通道内横掠圆管对流换热的数值模拟Journal of Water Resources and Water Engineering[J].,2016,27(6):134-140 |
| 突扩通道内横掠圆管对流换热的数值模拟 |
| Numerical simulation of the confined circular cylinder flow and heat transfer in a sudden expansion channel |
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| DOI：10.11705/j.issn.1672-643X.2016.06.24 |
| 中文关键词: 突扩通道 圆管 对流换热 数值模拟 通道突扩比 |
| 英文关键词: a sudden expansion channel circular cylinder convection and heat transfer numerical simulation expansion ratio of the channel |
| 基金项目:国家自然科学基金项目(51306121) |
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| 中文摘要: |
| 采用非稳态数学模型对突扩通道内横掠圆管流动与换热进行了数值模拟。分别对不同雷诺数Re以及不同通道突扩比Er情况进行数值模拟。结果表明：随着Re的变化，数值解有稳态，周期振荡和混沌。同时随着雷诺数的增加，圆管附近的换热不断增强。对于不同突扩比，当10≤Re≤100和250≤Re≤300时，圆管的换热随着通道突扩比的增加而变弱；当100＜Re≤200时，圆管换热并不单调减弱。 |
| 英文摘要: |
| A numerical simulation is performed by adopting unsteady mathematical mode for the confined circular cylinder flow and heat transfer in a sudden expansion channel. The simulations were carried out under different Reynolds number Re and the sudden expansion ratio of the channel Er. The results indicated that numerical solutions could be steady state, periodical oscillatory or chaotic with the change of Reynolds number. Meanwhile, the heat transfer around the cylinder was enhanced obviously with the increase of Reynolds number. The heat transfer around the cylinder was weak with the increase of the channel expansion ratio when 10≤Re≤100 or 250 ≤Re≤300, but when 100＜Re≤200, heat transfer around the cylinder did not always decrease monotonously. |
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