Open AccessNUMERICAL INVESTIGATION OF A TONE NOISE OF THE FAN WITH CASING TREATMENT
Author(s) -
Yaroslav Druzhinin,
AUTHOR_ID,
Victor Mileshin,
Anton Rossikhin,
AUTHOR_ID,
AUTHOR_ID
Publication year - 2021
Publication title -
vestnik permskogo nacionalʹnogo issledovatelʹskogo politehničeskogo universiteta. aèrokosmičeskaâ tehnika
Language(s) - English
Resource type - Journals
eISSN - 2304-6457
pISSN - 2224-9982
DOI - 10.15593/2224-9982/2021.66.03
Subject(s) - turbofan , casing , acoustics , aerodynamics , noise (video) , turbomachinery , nozzle , tone (literature) , harmonic , power (physics) , engineering , computer science , physics , aerospace engineering , mechanical engineering , art , literature , quantum mechanics , artificial intelligence , image (mathematics)
Numerical investigation of influence of a slot-type casing treatment on acoustic and aerodynamic characteristics of the fan of ultra-high bypass ratio turbofan is presented. The investigation was performed using NUMECA FINE/Turbo solver. NLH harmonic method was used to simulate the effect of casing treatment on unsteady flow field in the turbomachine. Two operational conditions were investigated – “sideline” and “approach”. The attention for the first operational condition was paid for aerodynamic characteristics. Significant influence of casing treatment on them was found especially near the surge line. At the “approach” operational conditions the attention was paid for the proper calculation of tone noise. It was shown that the installation of casing treatment leads to decrease of power of tone noise radiated through the inlet. However the power of the tone noise, radiated through the nozzle, and also the overall power of tone noise increase.