风压通风中排风风帽的影响

何国青,唐艺甜

Influence of exhaust wind cowls on wind driven ventilation

Guo-qing HE,Yi-tian TANG

表 2 不同出口形式的房间进出口处内侧压强（参考风速为5 m/s）

Tab.2 Measured pressures at inlet and outlet of room with different exhausts (reference velocity is 5 m/s)

类型 α/(°) pin/Pa $ {\overline{p}}_{\mathrm{i}\mathrm{n}}/\mathrm{P}\mathrm{a} $ pout/Pa $ {\overline{p}}_{\mathrm{o}\mathrm{u}\mathrm{t}}/\mathrm{P}\mathrm{a} $ Δ $ {\overline{p}} $/Pa 测点6′ 测点7′ 测点9′ 测点10′ 测点15′ 测点16′ 测点13′ 测点14′ 测点11′ 测点12′ 百叶型风帽 0 7.872 8.132 7.898 7.740 7.910 5.249 5.032 5.025 5.066 4.972 5.085 5.071 2.839 90 −5.635 −5.604 −5.612 −5.426 −5.569 −7.092 −7.282 −7.145 −6.709 −7.533 −7.129 −7.148 1.579 180 −1.852 −1.571 −1.744 −1.512 −1.669 −2.887 −2.938 −2.918 −3.074 −2.934 −2.868 −2.936 1.267 挡板型风帽 0 5.359 5.365 5.304 5.393 5.355 −3.640 −3.748 −2.769 −3.324 −3.178 −3.399 −3.343 8.690 90 −5.310 −5.413 −5.346 −5.127 −5.299 −6.654 −6.674 −6.557 −6.709 −6.645 −7.087 −6.721 1.422 180 −2.990 −2.959 −3.090 −2.676 −2.928 −8.296 −8.250 −7.899 −8.187 −8.080 −8.400 −8.185 5.257 弯管出口 0 12.679 12.766 12.851 12.345 12.660 13.662 13.382 14.973 14.971 14.825 14.779 14.432 −1.772 90 −6.391 −6.312 −6.132 −6.318 −6.289 −8.592 −8.656 −8.357 −7.898 −8.575 −8.485 −8.427 2.140 180 −3.951 −3.890 −3.725 −3.738 −3.826 −7.738 −7.836 −7.951 −7.996 −7.624 −7.716 −7.810 3.984