室内通风系统气流噪声预测方法的改进(英文)

Development of Generalized Prediction Methods for Flow-Generated Noise Produced by Indoor Ventilation Systems

管道气流噪声是室内通风系统中的常见问题.由于后期改造十分困难,在设计阶段对由管道内障碍物等因素产生的气流噪声进行精确的预测计算是非常必要的.目前已有一些管道气流噪声预测的基本方法,但是很多预测手段都基于传统声学测量得到的数据.笔者近来不依赖于传统的测量数据,研究了运用计算流体动力学理论对管道内气流噪声进行预测的可行性,文中讨论了采用该方法遇到的问题以及近期在采用计算流体动力学计算气流噪声方面的研究工作.

Indoor environmental quality is affected by the acoustical performance of a ventilation system and fiow-generated noise is one of noise problems encountered in the system. It is important to accurately predict the flow-generated noise produced by in-duct elements at design stage because it is difficuh to solve the problems after the commissioning of the system. Several works have been contributed to develop a generalized prediction method. However, most prediction techniques are based on the data obtained from the conventional measurement methods. Instead of relying on the conventional measurement approach to the obtaining of flow and acoustical data, the author and his co-investigator（s） have recently investigated the feasibility of applying the technique of Computational Fluid Dynamics （CFD） to the prediction of flow-generated noise produeed by in-duct elements. In this paper, the problems encountered in the development of the prediction methods are discussed and the recent works on the prediction of the flow-generated noise using CFD are introduced.