オリフィスを有する円管入口の熱伝達に関する研究

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書誌事項

タイトル別名
  • Heat Transfer for Air Flowing through Pipe, Having Orifice or Nozzle at the Entry
  • オリフィス オ ユウスル エンカン イリグチ ノ ネツ デンタツ ニ カンスル ケンキュウ

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抄録

The flow through a pipe, having orifice or nozzle at the entry, consists of two parts. The first is the diverging part of jet stream from the orifice and the second is the accelerating part. The relation between heat transfer coefficient and pressure drop at the first part is obtained by using dimensional relationships. The heat transfer coefficient at the second part can be obtained on the assumption that the flow at this part is developing boundary layer. When the area ratio is nearly 1, the second part flow becomes a fully developed one and the local heat transfer coefficient is constant.

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