Abstract
1. Calculation of ventilating volume of roof monitor equiped with structure which is caused by wind, is as illustrate Fig (1), indicate to the following equation. [numerical formula] (1) [numerical formula] (2) [numerical formula] (3) where P_i: wind pressure at inlet on wall surface, mmAq P_<m0>: wind pressure at roof monitor, mmAq V: wind tunnel velocity, m/s c_i: coefficient of wind pressure at inlet on wall surface c_<m0>: coefficient of wind pressure at roof monitor (for venilating calculation) ζ_i: pressure loss coefficient at inlet on wall surface ζ_<m0>: pressure loss coefficient at roof monitor V_i: average velocity of wind through inlet at wall surface m/s V: average velocity of wind through the part of roof monitor m/s 2. In order to calculate the equation (1), both ζ_<m0> in the equation (1) and C_<m0> in the equation (3) are susulted from wind tunnel experiment. 3. As for c_<m0>, it is calculated by use of the following equation, [numerical formula] (4) where P_<s0>: total pressure of the room when v=v_i=0. Wind pressure P_<m0> and coefficient of wind pressure c_<m0>, have the rather different meaning from those of construction calculating. They may be vanouse according to kind of roof monitor, velocity of wind tunnel and direction of wind, (see Fig 1) 4. ζ_<m0> is calculated by use of following equation, [numerical formula] [numerical formula] (5) where P_<sv>: total pressure of the room when v≒0 P_<m0>: total pressure of the room when v=0 (P_<m0>=P_<s0>) and following expression is proved ζ_<m0>=f(θ,v/V) θ: wind direction ζ_<m0> sudject to v/V and θ, are indicated, (see Fig 7〜10)
