采用数值模拟的方法对不同火源位置和不同加压送风量下高层建筑楼梯间内加压送风的效果开展研究.结果表明,当加压送风机位于底部时,楼梯间内的正压值在着火楼层以下随高度的增加而降低,在着火楼层处达到最低,在着火楼层以上随高度的增加而增加并最终趋于一稳定值,该稳定值与加压送风量近似呈线性增长的关系.着火楼层开门处的空气流速较快,其他楼层的门缝流速相对较小.门缝隙处的空气流速随加压送风量的增大而增大,通过着火层开门流出空气的流速增加明显.%Numerical simulation was used to study the pressure and air velocity under pressurization in high-rise building's stair-rnwell with different fire positions and pressurization volumes. Results showed, with pressurization fan located in bottom of high-rise building, pressure under fire floor in stairwell de-creased with increasing height. Pressure on fire floor in stair-well was the lowest. Pressure over fire floor in stairwell in-creased to a stable value with increasing height. It was possible to derive a linear fitting on stable pressure with pressurization volume. Air velocity on opening door of fire floor was much higher than other floor's. Air velocity on opening vent increased with increasing pressurization volume, obvious increase on 0-pening door of fire floor.
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