Searched for: subject%3A%22facilities%22
(1 - 2 of 2)
document
Guariglia, Daniel (author), Rubio Carpio, A. (author), Schram, Christophe (author)
Shock-cell noise occurs in aero-engines when the nozzle exhaust is supersonic and shock-cells are present in the jet. In commercial turbofan engines, at cruise, the secondary flow is often supersonic underexpanded, with the formation of annular shock-cells in the jet and consequent onset of shock-cell noise. This paper aims at describing the...
journal article 2018
document
Zandbergen, T. (author), Martlew, D.L. (author)
The National Aerospace Laboratory NLR in the Netherlands and the National Gas Turbine Establishment NOTE operate similar acoustic flow duct facilities but with differences in their respective approaches to the measurement of attenuation and impedance of duct linings. A joint exercise was arranged with the object of comparing methods and results,...
report 1981