Open AccessExperimental Analysis of Acoustic Performance of Porous Ducts using a Small- scale Shock tube
Author(s) -
K. Srinadhi,
B. T. Kannan
Publication year - 2020
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/988/1/012024
Subject(s) - baffle , mach number , materials science , shock tube , porosity , shock (circulatory) , oblique shock , mechanics , shock wave , duct (anatomy) , tube (container) , acoustics , structural engineering , physics , composite material , mechanical engineering , engineering , anatomy , medicine
A Shock tube is a device often used to recreate the shock phenomena by several methods. The present work is a preliminary study to analyse the efficiency of baffles in suppressing the noise generated from the shock associated jet ejected from the duct exit. The experiment was performed at a shock Mach number of 1.27 using a diaphragm based, small scale, open ended shock tube. Parametric study conducted by varying the baffle dimensions such as outer diameter, hole diameter and porosity reveals that the baffles with hole diameter less than half of the baffle diameter and with a greater porosity is a cost effective and efficient noise suppressor for shock associated jets.