回転管内における旋回流れ場に関する研究  第2報,数値解析 その2

書誌事項

タイトル別名
  • Study on the Swirling Flow Field in a Rotating Cylinder (2nd Report, Numerical Analysis - Part 2).
  • カイテンカン ナイ ニ オケル センカイ ナガレバ ニ カンスル ケンキュウ ダイ2ホウ スウチ カイセキ ソノ 2

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In the 1st report, numerical results were presented for the swirling flow field in a rotating hollow turbine shaft. The existence of a rotating spiral vortex at the place where the swirling flow turns radially outward was shown. The first non-axisymmetric mode of a single spiral vortex was transformed into the second mode of a double sprial vortex at a specific rotating speed of the shaft. In this report, the downstream region of the computational domain is extended to the wheel space, the cavity between the corotating turbine disks, to solve the swirling flow field in the internal cooling air system of a gas turbine. The data on precessing frequencies of the rotating spiral vortex in this numerical analysis are compared with experimental results in a companion paper(3rd report). In addition, attention is paid to the three-dimensional swirling flow field in the rotating cavity with the rotating spiral vortex in the straigth tube.

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