KAJIAN KEBISINGAN PROPELER G-SONIC 13â€x12†SECARA
EKSPERIMENTAL DAN SIMULASI KOMPUTASIONAL
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Institusion
INSTITUT TEKNOLOGI DIRGANTARA ADISUTJIPTO
Author
ANNA PRATIWI, ELISABETH
Subject
T Technology (General)
Datestamp
2024-07-23 06:45:01
Abstract :
Propeller may generate high-level noise in its operation. Interaction between propeller and air is the main contributing factor. In steady condition, when propeller does not move forward, noise will be mostly heard along the propeller-generated airflow direction (behind the propeller). This thesis aims to investigate the noise-level of propeller by performing calculations of noise directivity and sound power level experimentally and computationally. The experiment was conducted in a hemi-anechoic chamber of Balai Besar Aerodinamika, Aeroelastika, and Aeroakustika BBPT (BBTA3 BPPT). The computational simulation was performed through the use of ReNormalization Group (RNG) k-e turbulent model as well as acoustics computation employing Ffowcs William-Hawking (FW-H) formulation. Experimental results show that the highest value of noise directivity appears along the airflow direction (position 13, angle 180). Nevertheless, the conducted simulation could not capture such phenomenon. The average error of noise directivity results between experiment and simulation is 10.16%. Meanwhile, that of sound pressure level is 7.87%.
Propeller may generate high-level noise in its operation. Interaction between propeller and air is the main contributing factor. In steady condition, when propeller does not move forward, noise will be mostly heard along the propeller-generated airflow direction (behind the propeller). This thesis aims to investigate the noise-level of propeller by performing calculations of noise directivity and sound power level experimentally and computationally. The experiment was conducted in a hemi-anechoic chamber of Balai Besar Aerodinamika, Aeroelastika, and Aeroakustika BBPT (BBTA3 BPPT). The computational simulation was performed through the use of ReNormalization Group (RNG) k-e turbulent model as well as acoustics computation employing Ffowcs William-Hawking (FW-H) formulation. Experimental results show that the highest value of noise directivity appears along the airflow direction (position 13, angle 180). Nevertheless, the conducted simulation could not capture such phenomenon. The average error of noise directivity results between experiment and simulation is 10.16%. Meanwhile, that of sound pressure level is 7.87%.
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