国家大剧院座椅下送风风口气流噪声实验研究

国家大剧院观众席采用座椅下送风、顶部回风的“置换通风”空调方式,但目前国内外缺乏对此类风口气流噪声的研究,缺乏可信赖的实验数据,因此委托清华大学建筑技术科学研究所对其进行实验研究。实验采用混响室精密法测量了两种样式的座椅下送风风口在不同风量下的气流噪声声功率级,测量结果表明:两种风口气流噪声都很低,且无实质性差异,均满足国家大剧院剧场观众席噪声控制指标。实验解决了国家大剧院座椅下送风风口选型遇到的问题,同时也可为其他工程和同类风口的气流噪声研究提供借鉴。

Experimental research on chair outlet airflow noise for China National Grand Theater

Displacement ventilation supplying air from the chairs and returning air from the top is used in the auditoriums of China National Grand Theater(CNGT).Studies on the airflow noise from the chair outlet are necessary.The precision method for reverberation chambers is used in the experiment to measure the sound power level(SPL) of airflow noise of two kinds of chair outlet under different conditions.The experimental result shows that there are no essential differences be-tween two outlets in terms of air noise.They both meet the noise criterion for the CNGT.The experiment has removed an obstacle of HVAC noise attenuation design for CNGT.It may be used as a reference for other projects and similar chair outlets airflow noise research.