Effects of Geometric Parameters of Perforated Diffuser on Sound Pressure Level Sourced By Airflow

Ahmet Erdoğan; İshak Gökhan Aksoy; Suat Canbazoğlu

Makale detayları

Effects of Geometric Parameters of Perforated Diffuser on Sound Pressure Level Sourced By Airflow

Yazarlar:

Ahmet Erdoğan | İshak Gökhan Aksoy | Suat Canbazoğlu

Yayıncı:

Karyay Karadeniz Yayımcılık

Ana Başlıklar:

Akışkan Akışı | Isı ve Kütle Transferinde Hesaplamalı Yöntemler (Hesaplamalı Akışkanlar Dinamiği Dahil)

Dergi:

Black Sea Journal of Engineering and Science Vol.7 Issue 2, pp.271-276

Belge Tipi:

Makale

Yayın Tarihi:

3/2024

Belge Dili:

İngilizce

Document ID (Org No.):

2001311292

pISSN:

2619-8991

Anahtar kelimeler:

Özet:

 This study investigates the aeroacoustic behaviors of a square truncated perforated diffuser under airflow, commonly used in Air Handling Units AHUs. The design parameters are fundamentally taken into account to unveil the aeroacoustic performance of the diffuser. Initially, unsteady-state Computational Fluid Dynamics CFD simulations are conducted based on models that accurately represent the fluid domain of the chamber with the perforated diffuser in the ANSYS Fluent environment. Subsequently, the Ffowcs Williams and Hawkings FW-H method integrated into the software is employed to acquire time-dependent signals from microphones placed in three different locations within a perforated diffuser chamber. Finally, the results are converted to a frequency range of 0-1000 Hz using the Fast Fourier Transform FFT method, and the SPL values are obtained. The results show that the microphone location is crucially important to determine SPL and the porosity reduction from 0.55 to 0.35 can reduce SPL by approximately 30-40 dB. Variations in wall thickness of the diffuser fluctuated between 5-10 dB at each frequency value.

 This study investigates the aeroacoustic behaviors of a square truncated perforated diffuser under airflow, commonly used in Air Handling Units AHUs. The design parameters are fundamentally taken into account to unveil the aeroacoustic performance of the diffuser. Initially, unsteady-state Computational Fluid Dynamics CFD simulations are conducted based on models that accurately represent the fluid domain of the chamber with the perforated diffuser in the ANSYS Fluent environment. Subsequently, the Ffowcs Williams and Hawkings FW-H method integrated into the software is employed to acquire time-dependent signals from microphones placed in three different locations within a perforated diffuser chamber. Finally, the results are converted to a frequency range of 0-1000 Hz using the Fast Fourier Transform FFT method, and the SPL values are obtained. The results show that the microphone location is crucially important to determine SPL and the porosity reduction from 0.55 to 0.35 can reduce SPL by approximately 30-40 dB. Variations in wall thickness of the diffuser fluctuated between 5-10 dB at each frequency value.

 This study investigates the aeroacoustic behaviors of a square truncated perforated diffuser under airflow, commonly used in Air Handling Units AHUs. The design parameters are fundamentally taken into account to unveil the aeroacoustic performance of the diffuser. Initially, unsteady-state Computational Fluid Dynamics CFD simulations are conducted based on models that accurately represent the fluid domain of the chamber with the perforated diffuser in the ANSYS Fluent environment. Subsequently, the Ffowcs Williams and Hawkings FW-H method integrated into the software is employed to acquire time-dependent signals from microphones placed in three different locations within a perforated diffuser chamber. Finally, the results are converted to a frequency range of 0-1000 Hz using the Fast Fourier Transform FFT method, and the SPL values are obtained. The results show that the microphone location is crucially important to determine SPL and the porosity reduction from 0.55 to 0.35 can reduce SPL by approximately 30-40 dB. Variations in wall thickness of the diffuser fluctuated between 5-10 dB at each frequency value.

 This study investigates the aeroacoustic behaviors of a square truncated perforated diffuser under airflow, commonly used in Air Handling Units AHUs. The design parameters are fundamentally taken into account to unveil the aeroacoustic performance of the diffuser. Initially, unsteady-state Computational Fluid Dynamics CFD simulations are conducted based on models that accurately represent the fluid domain of the chamber with the perforated diffuser in the ANSYS Fluent environment. Subsequently, the Ffowcs Williams and Hawkings FW-H method integrated into the software is employed to acquire time-dependent signals from microphones placed in three different locations within a perforated diffuser chamber. Finally, the results are converted to a frequency range of 0-1000 Hz using the Fast Fourier Transform FFT method, and the SPL values are obtained. The results show that the microphone location is crucially important to determine SPL and the porosity reduction from 0.55 to 0.35 can reduce SPL by approximately 30-40 dB. Variations in wall thickness of the diffuser fluctuated between 5-10 dB at each frequency value.

Makale detayları

Effects of Geometric Parameters of Perforated Diffuser on Sound Pressure Level Sourced By Airflow

Yazarlar:

Ahmet Erdoğan | İshak Gökhan Aksoy | Suat Canbazoğlu

Yayıncı:

Karyay Karadeniz Yayımcılık

Ana Başlıklar:

Akışkan Akışı | Isı ve Kütle Transferinde Hesaplamalı Yöntemler (Hesaplamalı Akışkanlar Dinamiği Dahil)

Dergi:

Black Sea Journal of Engineering and Science Vol.7 Issue 2, pp.271-276

Belge Tipi:

Makale

Yayın Tarihi:

3/2024

Belge Dili:

İngilizce

Document ID (Org No.):

2001311292

pISSN:

2619-8991

Air handling units

Computational fluids dynamic

Perforated diffuser

Sound pressure level

Ansys fluentAir handling units

Computational fluids dynamic

Perforated diffuser

Sound pressure level

Ansys fluent

Sayı

Makale detayları

Yazarlar: Ahmet Erdoğan | İshak Gökhan Aksoy | Suat Canbazoğlu

Yayıncı: Karyay Karadeniz Yayımcılık

Ana Başlıklar: Akışkan Akışı | Isı ve Kütle Transferinde Hesaplamalı Yöntemler (Hesaplamalı Akışkanlar Dinamiği Dahil)

Dergi: Black Sea Journal of Engineering and Science Vol.7 Issue 2, pp.271-276

Belge Tipi: Makale

Yayın Tarihi: 3/2024

Belge Dili: İngilizce

Document ID (Org No.): 2001311292

pISSN: 2619-8991

Sayı

Yazarlar:

Ahmet Erdoğan | İshak Gökhan Aksoy | Suat Canbazoğlu

Yayıncı:

Karyay Karadeniz Yayımcılık

Ana Başlıklar:

Akışkan Akışı | Isı ve Kütle Transferinde Hesaplamalı Yöntemler (Hesaplamalı Akışkanlar Dinamiği Dahil)

Dergi:

Black Sea Journal of Engineering and Science Vol.7 Issue 2, pp.271-276

Belge Tipi:

Makale

Yayın Tarihi:

3/2024

Belge Dili:

İngilizce

Document ID (Org No.):

2001311292

pISSN:

2619-8991