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ISSN オンライン: 2642-0554

DIRECT NUMERICAL SIMULATION AND MODELING OF A TURBULENT BOUNDARY LAYER WITH SEPARATION AND REATTACHMENT

Hiroyuki Abe
Computational Science Research Group, Japan Aerospace Exploration Agency

Yasuhiro Mizobuchi
Japan Aerospace Exploration Agency Chofu, Tokyo 182-8522, Japan

Yuichi Matsuo
Information Technology Center, Japan Aerospace Exploration Agency Jindaiji-higashi, Chofu, Tokyo 182-8522, Japan

Philippe R. Spalart
Boeing Commercial Airplanes P.O. Box 3707, Seattle, WA 98124, USA

要約

Direct numerical simulations (DNSs) of a flat-plate turbulent boundary layer with separation and reattachment have been carried out over a range of Reynolds numbers. The strong blowing and suction are imposed at the upper boundary for producing a large turbulent separation bubble, thus dealing with massive separation. The inlet data prescribed are those from DNSs of a zero-pressure-gradient turbulent boundary layer. Three values of the Reynolds number based on the freestream velocity and inlet momentum thickness (viz., 300, 600 and 983) are used. Particular attention is given to Reynolds number dependence in the bubble, streamline curvature effects and similarity to a mixing layer. Also made is an evaluation of the Reynolds-averaged Navier-Stokes (RANS) turbulence models such as k-ε, k-ω and SST models using the resulting DNS data.