孔板穿孔管气流脉动衰减性能及计算方法的研究

本文研究了气流脉动衰减器及噪声控制装置上常用的孔板穿孔管元件的衰减性能.使用一维非定常匀熵修正理论的特征线性,利用梯形积分法和Hartree迭代法给出了数值计算方法.目的是将衰减器性能的研究从依靠大量实验方法改变到依靠理论计算的轨道上来.从理论与实验对此上来看,本文的方法是有效的、可靠的.孔板穿孔管对气流脉动和噪声都有很好的控制和衰减性能.

A RESEARCH ON THE ATTENUATION PERFORMANCE OF GAS FLOW PULSATION AND NUMERICAL METHOD IN PERFORATED TUDE WITH ORIFICE PLATE

This paper not only investigates the attenuation performance in perforated tube with orifice plate which is commonly used on the muffler for pulsating flow and the noise-control device, but also puts forward an efficient numerical method to deal with it. The numerical method is composed of the characteristic in the modified homoentropic method for one-dimension non-steady flow, the trapezium integration and Hartree iterative scheme. The purpose of the paper is to improve the investigation method for the muffler with numerical calculation instead of lange amount of experimental work. The numerical method used in this paper is efficient and reliable. In conclusion, the perforated tube with orifice plate has quite satisfactory attenuation performance in pulsating flow and control effect on the noi(?)e.