The Intermediate Wake of a Thick Flat Plate with a Circular Trailing Edge

Rai, Man Mohan

关键词: DIRECT NUMERICAL SIMULATION;    WAKES;    TRAILING EDGES;    FLAT PLATES;    THICK PLATES;    TURBULENCE;    BOUNDARY LAYERS;   

RP-ID  :  NASA/TM-2019-220338,ARC-E-DAA-TN72722

学科分类：力学，机械学

美国|英语

来源: NASA Technical Reports Server

【 摘 要 】

The intermediate wake region of a thick flat plate with a circular trailing edge (TE) is investigated with a direct numerical simulation (DNS). The upper and lower separating boundary layers are both turbulent and are statistically identical; the resulting wake is symmetric in the mean. Earlier research dealt with the near/very-near wake of the same plate (x/D < 13.0, x is the streamwise distance from the center of the circular TE and D is the plate-thickness/TE-diameter). In the present investigation the emphasis is on the evolution of shed-vortex structure and turbulence intensity distributions with increasing x; the focus is on the region 20.0 < x/D < 40.0. Profile similarity in wake velocity statistics is explored.