Development and validation of a measurment procedure to determine the radiated sound power of a radial compressor

开发和验证测量程序以确定径流式压缩机的辐射声功率

• 批准号: 258517910
• 负责人: Professor Dr. Lars Enghardt
• 金额: --
• 依托单位: Institut für Strahlantriebe und Turboarbeitsmaschinen (IST)
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2015
• 资助国家: 德国
• 起止时间: 2014-12-31 至 2022-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/258517910?language=en
• 关键词: Development; validation; measurment; procedure; determine

The primary task of the present project is to develop a measurement system capable of determining most accurately the sound power emitted by a radial compressor into the connected flow discharge pipe considering a low sensor count. This measurement system will help future studies to investigate the influencing factors in the emitted tonal sound field and evaluate different approaches to reduce sound emissions.In contrary to the DIN EN ISO 5136 Method (the fan sound power levels are estimated in third octave bands) the measurement system developed here will have a higher accuracy in the determination of the tonal sound power components emitted by the radial compressor. Furthermore, a good estimation of the induct mode field at specific blade passing frequencies will be achieved. Opposed to high resolution measurements conducted by using traversal duct sections the measurement system at hand is based on an easy, robust and low cost design making it accessible for smaller research groups. The long term goal by providing the measurement system is to advance the research field of radial compressor acoustics and to reduce the noise emissions of stationary compressor facilities.The goal of the requested second project phase is the experimental proof of applicability of two measurement systems, which were developed and tested in a virtual environment in the first project phase. To do so, the measurement systems will be implemented at the radial compressor facility of the RWTH Aachen. A comparison of the experimental obtained tonal sound power of the applied project phase II and the numerical computed tonal sound power of project phase I will determine which of the both developed and implemented methods preform better, from which the final measurement system will be derived. Furthermore the numerical study and the development of the measurement methods are extended to the radial compressor considering a vaned diffusor.

本项目的主要任务是开发一种测量系统，该系统能够在传感器数量较少的情况下，最准确地确定径向压缩机向连接的流量排放管道发射的声功率。与DIN EN ISO 5136方法(风扇声功率级是在第三倍频程内估计)相反，本文开发的测量系统在确定径向压缩机发出的声功率分量时将具有更高的精度。此外，还可以很好地估计特定叶片通过频率下的感应模场。与使用横管截面进行高分辨率测量不同，手头的测量系统基于简单、坚固和低成本的设计，使其适用于较小的研究小组。提供测量系统的长期目标是推动径向压缩机声学研究领域的发展，降低固定压缩机设施的噪声排放。请求进行的第二阶段项目的目标是通过实验证明两种测量系统的适用性，这两种测量系统是在第一阶段在虚拟环境中开发和测试的。为此，测量系统将在RWTH亚琛的径向压缩机设施中实施。将应用项目第二阶段的实验获得的音调声功率与项目第一阶段的数值计算的音调声功率进行比较，将确定开发和实施的方法中哪一种更好，从而得出最终的测量系统。此外，数值研究和测量方法的发展也扩展到考虑叶片扩散器的径向压气机。