圆角化对方柱气动性能影响的流场机理1)

杜晓庆, 田新新, 马文勇, 李二东

EFFECTS OF ROUNDED CORNER ON AERODYNAMICS OF SQUARE CYLINDERS AND ITS FLOW MECHANISMS1)

Du Xiaoqing, Tian Xinxin, Ma Wenyong, Li Erdong

表1 $ \alpha $ = 0$^\circ$标准方柱计算结果及其验证

Table 1 Present result of sharp corner square cylinders for {$\alpha $} = 0$^\circ$ and its comparison with previous data

Case A1 2.2 2 120 20 0.025 2.02 1.24 0.12 Case A2 2.2 2 200 20 0.025 2.07 1.46 0.12 Case A3 2.2 2 400 20 0.025 2.03 1.45 0.12 Grid resolution-spanwise Case B1 2.2 2 200 10 0.025 2.05 1.38 0.12 LES Case B2=A2 2.2 2 200 20 0.025 2.07 1.46 0.12 (present) Case B3 2.2 2 200 40 0.025 2.03 1.38 0.12 Time step Case C1 2.2 2 200 20 0.006 2.08 1.41 0.12 Case C2 2.2 2 200 20 0.016 2.07 1.43 0.12 Case C3=A2 2.2 2 200 20 0.025 2.07 1.46 0.12 Spanwise length Case D1 2.2 1 200 10 0.025 2.05 1.38 0.12 Case D2=A2 2.2 2 200 20 0.025 2.07 1.46 0.12 Case D3 2.2 4 200 40 0.025 2.09 1.47 0.12 Ref.[1] 2.14 — — — 2.11 — 0.13 Expt. Ref.[2] 2.2 — — — — 1.2 0.13 Ref.[3] 17.6 — — — 2.05 1.22 0.12 Ref.[4] 3.4 — — — 2.21 1.26 0.13 Ref.[19] 2.2 4 — — 2.03 ?2.32 1.23 ?1.54 0.13 LES Ref.[20] 2.2 4 — — 2.02 ?2.77 1.15 ?1.79 0.09 ?0.15 Ref.[21] 2.2 4 — — 2.11 ?2.30 1.26 ?1.54 0.13 ?0.14