風壓通風是依靠建築物內外的氣壓差異所造成的空氣流動，具有改善室內空氣品質、節約空調耗能的功效。但風壓通風會受到室外風速、風向及開口特性的影響，定量計算較為困難。本研究利用風洞模型實驗來研究風壓通風的影響參數，研究參數包括風速、風向角、室外風場（包括無紊流、紊流和陣風風場）和通風開口的大小、形狀（正方形、圓形、長條形）對通風量和流量係數的影響。本研究並利用理論分析建立一個風壓平衡模式，此模式可利用室外壓力和開口的大小、流量係數來計算室內壓力與通風量。研究結果發現在穩態風場中，風壓平衡模式的預測值十分接近風洞實驗的結果，但此模式無法預測風向角為90°，因為紊流所產生的瞬時通風量。在陣風風場中，室內壓力的變化頻率與室外壓力之頻率相同。本研究所建構之通風量模式可應用於建築風壓通風量的計算，提升建築物的居住品質。

The wind-driven ventilation for buildings is dependent on the pressure difference between internal and exterior pressure. This study uses theoretical and experimental approaches to investigate wind-driven ventilation. The experiments were carried out in a large scale wind tunnel to study the influences of wind speed, attack angle, size and shape of opening and outdoor flow conditions (steady flow, turbulent flow and gusty flow). Besides, a wind-pressure balance model was developed to calculate the ventilation rate depending on the exterior pressure, opening size and discharge coefficient. The experimental results demonstrate that the wind-pressure balance model can predict ventilation rates of different opening sizes and attack angles in steady flow, but fail to predict the instantaneous ventilation rate in turbulent flow when in the attack angle is 90°. In the gusty flow, the internal pressure has the same fluctuating frequency as the exterior pressure

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