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 1 进出口中心位置处的风压比较(参考风速为5 m/s)

Tab.1 Comparison of wind pressures at center of inlet and outlet (reference velocity is 5 m/s)

工况 开口封闭 开口打开 $ {p}_{\mathrm{i}\mathrm{n}} $ $ {p}_{\mathrm{o}\mathrm{u}\mathrm{t}} $ Δp $ {p}_{\mathrm{i}\mathrm{n}} $ $ {p}_{\mathrm{o}\mathrm{u}\mathrm{t}} $ Δp Pa 1 9.518 12.766 −3.248 10.499 15.023 −4.525 2 −5.749 −10.434 4.685 −6.551 −7.928 1.377 3 −1.398 −10.026 8.628 −0.776 −7.297 6.521 4 −5.504 12.766 −18.270 −5.062 16.254 −21.316 5 −1.509 −10.434 8.925 −1.606 −6.238 4.633 6 −6.213 −10.026 3.814 −5.272 −7.677 2.405 7 9.212 −6.163 15.375 9.309 −6.511 15.821