Abstract
An analysis is presented for the effect of Y-HZ/zircon porous composites as a bulk-reacting liner on the sound wave propagation and attenuation in an annular lined variable area duct with flow. The sound propagation in the lining material is coupled with the wave propagation in the main duct, the analysis include the effect of main flow velocity in both the up and down-stream propagation. The results show that, the increase in porosity increases the attenuation, the increase in liner thickness and the resistivity increase the attenuation in the high frequency range but, decrease the attenuation in the low frequency range, the increase in temperature increases the attenuation specially in the down stream propagation. The use of Zircon porous Ceramics is very valuable in attenuation of noise emitted from the jet engine exhaust ducts as they have a good thermal and mechanical properties at high temperatures up to (1800 K) beside their good attenuation effect and their light weight.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
