圧縮性壁面吹出し流れに対する各種乱流モデルの予測性能の検証(流体工学,流体機械)

概要

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If separation occurs in a flow field, it makes a large pressure loss and thus aerodynamic performance is largely reduced. A wall jet (i.e. tangential blowing) is one of control techniques for such a flow field. However, the verification of turbulence models for a wall jet in compressible flow is insufficient. In the present study, we examine the predictive performance of five typical turbulence models (Spalart-Allmaras 1 eq. model, Lam-Bremhorst, Myong-Kasagi and Shimada-Nagano k-ε 2 eq. models and Craft-Launder-Suga k-ε-A_2 3 eq. model) for 3 cases of wall jet. In the results, the k-ε models show a relatively good predictive performance and little difference of distributions among the models. On the other hand, Spalart-Allmaras and Craft-Launder-Suga models indicate the inclination to overestimate a separation region.
一般社団法人日本機械学会の論文
2002-01-25