18 空気調和設備のダクト系に使用される中間箱型消音器の水頭損失について

DOI Web Site Web Site

書誌事項

タイトル別名
  • 18) REPORT ON THE EXPERIMENTAL RESEARCH OF THE PRESSURE LOSSES OF BOX TYPE SOUND ATTENUATORS
  • 空気調和設備のダクト系に使用される中間箱型消音器の水頭損失について
  • クウキ チョウワ セツビ ノ ダクトケイ ニ シヨウ サレル チュウカン ハコガタ ショウオンキ ノ スイトウ ソンシツ ニ ツイテ

この論文をさがす

抄録

1. All experiment on natural ventilation by the opening on wall of structure which have been made are study when air flows from the static air outdoor to the static space in door. But in respect of the opening of structure in natural wind, influence by natural wind, pressure loss at the opening on wall is to be different from that in the static air. So we made wind tunnel experiment using the models of the structure equipped with the opening on wall and obtained ventilating property of the opning in natural wind. 2. For example in Fig. 1, ventilating volume of structure by wind is given in following equation [numerical formula] (1) where [numerical formula]: wind pressure at inlet on wall, mmAq. [numerical formula]: wind pressure at outlet on wall, mmAq V: wind tunnel velocity c_i: coefficient of wind pressure at inlet on wall c_0: coefficient of wind pressure at outlet on wall ζ_i: coefficient of pressure loss at inlet on wall ζ_0: coefficient of pressure loss at outlet on wall v_i: mean wind velocity at inlet on wall v_0: mean wind velocity at outlet on wall ζ_k: coefficient of pressure loss in each part of room v_k: mean wind velocity at each part of room 3. To make calculation of ventilating volume by equation (1) possible, ζ_0, ζ_i, c_i, c_0 was defined by wind tunnel experiment. c is given by the following equation (see Fig 1-(b)) [numerical formula] (2) where p_<s0>: pressure of room when mean wind velocity of opening, v=0 ζ is given by following equation (see Fig 1-(b)) [numerical formula] (3) [numerical formula] (4) where p_<sv>: pressure of room when wind velocity at opening, v=v_i=v_i or v_0 and [numerical formula] is defined and where v/V and θ is changed variously is indicated, (see Fig 5〜10) 4. This experiment study is made useing models of detouched house and that of 4 storied apartments building and c, ζ at opening defined.

収録刊行物

詳細情報 詳細情報について

問題の指摘

ページトップへ