Identification of sources in a duct is an important experimental method to study the generation and propagation mechanism of sources in a duct. However, the previous identification methods in the duct ...

3. The muffler sheet is made of superfine glass wool of 20~30Kg/m3 laying outside galvanized perforated plate with perforated percentage ≥20%. Therefore, it performs well for middle and high-frequency ...

Purpose The purpose of this experimental research was to examine a novel axial heat exchanger featuring swirling air movement over heated tubes. This apparatus is designed with perforated circular ...

If the ductwork has an inner wall it should be no less than 23 percent open area. Solid inner-wall or perforated walls wrapped with a polyethylene sheet could destroy most of the noise control of the ...

In engine exhaust systems, perforated element is usually used to improve the acoustic attenuation performance of mufflers. To predict the acoustic attenuation performance of perforated duct mufflers ...