Afifatuzzakhira, Afifatuzzakhira (2026) Analisis Eksperimental dan Numerik Pengaruh Variasi Geometri Acoustic Louver terhadap Performa Akustik dan Karakteristik Aliran Udara pada Sistem Mekanis. Other thesis, Institut Teknologi Sepuluh Nopember.
![[thumbnail of 5001221057-Undergraduate_Thesis.pdf]](http://repository.its.ac.id/style/images/fileicons/text.png) |
Text
5001221057-Undergraduate_Thesis.pdf - Accepted Version Restricted to Repository staff only Download (7MB) | Request a copy |
Abstract
Acoustic louver dikembangkan sebagai solusi untuk mereduksi kebisingan tanpa menghambat aliran udara. Namun peningkatan kemampuan akustik umumnya diikuti oleh kenaikan hambatan aliran udara. Penelitian ini bertujuan untuk menganalisis pengaruh variasi geometri acoustic louver terhadap performa akustik berdasarkan Insertion LossInsertion Loss (IL), Noise ReductionNoise Reduction (NR), dan Directivity, pengaruhnya terhadap karakteristik aliran udara berdasarkan simulasi numerik, serta hubungan antara performa akustik dan karakteristik aliran udara. Penelitian dilakukan pada variasi resonator single neckneck tunggal (RNT) dan resonator double neckneck ganda (RNG) dengan sudut kemiringan bilah 0°, 30°, dan 45°. Pengujian akustik dilakukan secara eksperimental pada kedua variasi geometri dengan sudut kemiringan 0° dan 45°. Sedangkan karakteristik aliran udara dianalisis melalui pengukuran kecepatan aliran udara dan simulasi Computational Fluid Dynamics (CFD) menggunakan solver ANSYS CFX untuk semua variasi dengan sudut kemiringan bilah 0°, 30°, dan 45°. Hasil penelitian menunjukkan bahwa variasi geometri berpengaruh signifikan terhadap performa akustik maupun karakteristik aliran udara. Variasi RNG-45 menghasilkan performa akustik terbaik, ditunjukkan oleh IL dan NR yang lebih tinggi serta pola directivity yang lebih efektif dalam melemahkan transmisi bunyi. Dari sisi aerodinamik, sudut bilah 45° menghasilkan pressure droppressure drop yang lebih besar akibat penyempitan perforasi geometri, sedangkan sudut 0° memberikan hambatan aliran yang lebih kecil. Hasil simulasi juga menunjukkan bahwa konfigurasi double neckresonator neck ganda meningkatkan performa akustik tanpa menaikkan pressure droppressure drop secara signifikan. Dengan demikian, RNG-45 merupakan konfigurasi terbaik dari sisi akustik, sedangkan RNG-0 menunjukkan keseimbangan terbaik antara performa akustik dan karakteristik aliran udara.
======================================================================================================================================
Acoustic louvers have been developed as a solution to reduce noise transmission without obstructing airflow. However, improvements in acoustic performance are generally accompanied by an increase in airflow resistance. This study aims to analyze the effect of acoustic louver geometric variations on acoustic performance based on Insertion Loss (IL), Noise Reduction (NR), and directivity, their effect on airflow characteristics based on numerical simulations, as well as the relationship between acoustic performance and airflow characteristics. The study was conducted using single-neck resonator (RNT) and double-neck resonator (RNG) configurations with blade inclination angles of 0°, 30°, and 45°. Acoustic performance was evaluated experimentally for both geometric configurations with inclination angle of 0° and 45°. Meanwhile, airflow characteristics were analyzed through airflow velocity measurements and Computational Fluid Dynamics (CFD) simulations using ANSYS CFX solver for all variations with blade inclination angle of 0°, 30°, and 45°. The results indicate that geometric variations significantly effect both acoustic performance and airfloe characteristics. The RNG-45 configuration exhibited the best acoustic performance, as indicated by higher IL and NR values, as well as a directivity patters that more effectively attenuated sound transmission. From an aerodynamic perfective, the 45° blade inclination resulted in a higher pressure drop due to the reduction in the geometric perforation, whereas the 0° blade inclination produced lower airflow resistance. The simulation result also demonstrated that the double-neck configuration improved acoustic performance without causing a significant increase in pressure drop. Therefore, RNG-45 is the optimal configuration in terms of acoustic performance, while RNG-0 provides the best balance between acoustic performance and airflow characteristics.
| Item Type: | Thesis (Other) |
|---|---|
| Uncontrolled Keywords: | Acoustic Louver, Resonator Helmholtz, Insertion Loss, Noise Reduction, Directivity, Pressure Drop. Acoustic Louver, Helmholtz Resonator, Insertion Loss, Noise Reduction, Directivity, Pressure Drop. |
| Subjects: | Q Science > QC Physics Q Science > QC Physics > QC151 Fluid dynamics Q Science > QC Physics > QC221 Acoustics. Sound |
| Divisions: | Faculty of Science and Data Analytics (SCIENTICS) > Physics > 45201-(S1) Undergraduate Thesis |
| Depositing User: | Afifatuzzakhira Afifatuzzakhira |
| Date Deposited: | 06 Aug 2026 07:05 |
| Last Modified: | 06 Aug 2026 07:05 |
| URI: | http://repository.its.ac.id/id/eprint/144171 |
Actions (login required)
 |
View Item |