NOISE ATTENUATION DESIGN (MUFFLER) ON TURBOCHARGER - GAS TURBINE GTS 22 ENGINE

• Main Author: RAHENDRA PINANDHITA - NIM : 23616015, LAZUARDY
• Format: Theses
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/28573
• Institution: Institut Teknologi Bandung

<p align="justify"> <br /> <br /> Nowadays, global society life has been increasingly aware to green concept where life should be in harmony with nature. The one of the idea in the green concept is to reduce excessive sound exposure or noise. Turbocharger – gas turbine GTS 22 engine is an example of mechanical system that generate very high sound pressure level. Hence, this system is worth to be the case of noise control. Meanwhile, muffler is designated as noise control treatment after carefully analyzing the dominant noise spectrum of the gas turbine. The muffler is aimed to reduce the noise of the gas turbine GTS 22 in order to meet the recommended sound level at industrial area according to the Environmental Ministry decree: KEP–48/MENLH/11/1996. <br /> <br /> Numerical approach is employed to design the muffler. The resulting results are then validated by experimental ones. Moreover, noise reduction (NR) is used to assess the muffler performances. The design of muffler in this study contains all of combination treatment: area cross section expansion chamber, perforated system (micro perforated panel), porous material, partition chamber and concentric tube. The chosen final design of muffler is combination treatment design where NR 38,77 dB is present. This NR leads to sound pressure level of 80,82 dB or 68,95 dBA exist after the muffler applied on the exhaust of gas turbine. From the comparison results, the deviation of experimental results compared to numerical ones is 7,14% in average. Considering the result, the muffler design is successfully to meet the desired noise level as suggested in Indonesia environmental ministry regulation. Moreover, the pressure drop (&#916;P) of the muffler is only 0,4042% which is acceptable to keep the mechanical performace. <br /> <p align="justify">