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基于气动噪声分析理论,建立了物理模型,模拟分析了不同窗缝进风速度下窗体及室内空间的噪声声功率级分布。结果表明,对于典型的窗体结构,风速小于5m/s时进气噪声可忽略;风速大于20m/s时,会在射流流动分离区附近(包括上游)产生声功率级大于60dB的噪声源,在下游较宽广区域产生大于40dB的气动噪声声源;风速大于30m/s时,会在下游宽广区域产生大于60dB的气动噪声源,局部噪声接近80dB;对窗户进行一定改造,可消除噪声。
Based on the theory of aerodynamic noise analysis, a physical model was established to simulate and analyze the noise power level distribution in the window and the interior space under the different wind speeds. The results show that for a typical window structure, the air intake noise is negligible when the wind speed is less than 5m / s. When the wind speed is greater than 20m / s, a noise source with a sound power level greater than 60dB is generated near the jet flow separation zone (including upstream) Which produces more than 40dB of aerodynamic noise source in the wider downstream area. When the wind speed is greater than 30m / s, it will generate more than 60dB of aerodynamic noise source in a wide area downstream, with the local noise approaching 80dB. The window will be modified to eliminate the noise.