Design and Numerical Simulation of the Performance of Acoustic Plenum Chamber of a Marine Gas Turbine Air Supply System

In the present work, an approach to obtain a design method for size of plenum chamber cross-section marine gas turbine air supply system has been investigated. Flow in ducts makes noise which is very high inlet part because large amount flow. Therefore, this phenomenon should be considered process. A suitable duct proposed (considering acoustic and aerodynamic performance at same time). method, channel categorized into three sections according requirements acoustic; inlet, chamber, outlet channels with circular cross-sections. The geometrical dimensions have determined using plane waves theory about channel, effects flow ignored. Space limitations battleships dominant frequency considered. Then, optimized mid-channel section, terms both requirements, numerical methods regarding calculated. Various 3D turbulent flows inside considered, eddy simulation turbulence model utilized. Ffowcs, Williams Hawkings models are used sound propagation process based on Lighthill integral equation. validity checked by comparing results (sound pressure level) experimental data obtained from chamber. comparison revealed acceptable errors variety frequencies. disclosed that decreased when fraction inlet/outlet increased. With increase first Acoustic improved then worsen. Six different cases configurations presented, limitation battleship space Examining system, it was found level, around high-pressure area can move along system. Additionally, deviations considering inspected all cases. reason deviation airflow through quadrupole sources production causes higher modes.