三次元離散渦法による円形噴流の数値解析　最大渦度の制限による影響

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タイトル別名
  • Numerical Simulation of Round Jet by Three-Dimensional Discrete Vortex Method. On the Limitation of Maximum Value of Vorticity.
  • 3ジゲン リサン ウズホウ ニ ヨル エンケイ フンリュウ ノ スウチ カイセ

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An incompressible round compound jet issuing from a circular nozzle was simulated by a three-dimensional vortex blob method. The circular nozzle was composed of a source disc and vortex panels. The nascent vortex blobs were released from the edge of the nozzle in such a way that their circulation satisfies Kelvin's conservation law of circulation. The vortex rings released from the edge experienced vortex merging and developed three-dimensional structures with small-scale random structures. Effects of the limitation of maximum vorticity of the vortex blobs on the vortex structures were discussed. The large-scale vortical structure is fairly indendent of the limitation of maximum value of vorticity.

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