The noise study of ceiling swirl diffuser with serrated adjustable blades

• Autorzy: Kopania Joanna Maria , Bogusławski Grzegorz , Wójciak Kamil , Gaj Patryk

Identyfikatory

DOI

10.21008/j.0860-6897.2024.2.02

• Języki publikacji: EN

Abstrakty

EN

In this study, measurements of the aeroacoustic properties of air terminal devices (ATDs) control room ventilation. As a study object the ceiling swirl air diffuser with adjustable blades was chosen. These are mechanical devices designed to control fluid flow and create a swirl to supply air into rooms. They are also the source of the noise in rooms. In this work, the new construction of blades was proposed based on the owl's wings. The blades were printed on a 3D printer from ABS and polished. The two positions of attached blades to the front panel of the diffuser were studied - when the serrated and unseratted edge was leading edge. The front panel of the diffuser with blades was installed on the plenum box with a side entry without the damper. The measurements were made in the reverberation room according to ISO 5135 to find the blade's position with lower noise parameters.

Słowa kluczowe

EN

HVAC; noise; ceiling diffuser; owl’s technology

PL

HVAC; hałas; dyfuzor sufitowy; technologia sowy

• Wydawca: Poznan University of Technology. Institute of Applied Mechanics
• Czasopismo: Vibrations in Physical Systems
• Rocznik: 2024
• Tom: Vol. 35, nr 2
• Strony: art. no. 2024202
• Opis fizyczny: Bibliogr. 10 poz., il. kolor., rys., wykr.

Twórcy

autor

Kopania Joanna Maria

• Lodz University of Technology, Żeromskiego 116, 90-924 Lodz, Poland

• https://orcid.org/0000-0001-9162-6479

autor

Bogusławski Grzegorz

• Lodz University of Technology, Żeromskiego 116, 90-924 Lodz, Poland

• https://orcid.org/0000-0001-7501-2573

autor

Wójciak Kamil

• Institute of Power Engineering, Mory 8, 01-330 Warsaw, Poland

• https://orcid.org/0000-0002-3672-1788

autor

Gaj Patryk

• Institute of Power Engineering, Mory 8, 01-330 Warsaw, Poland

• https://orcid.org/0000-0001-6436-3466

Bibliografia

• 1. H. Brohus; Personal Exposure to Contaminant Sources in Ventilated Rooms; Engineering and Science, Aalborg University, PhD Thesis, 1997
• 2. S. Luo; Numerical Study of Three Dimensional Turbulent Flows in a Habitat With Coupled Heat and Mass Transfer; PhD Thesis, University of the Mediterranean (University of Aix-Marseille II), 2003
• 3. D. Romik, I. Czajka; Numerical Investigation of the Sensitivity of the Acoustic Power Level to Changes in Selected Design Parameters of an Axial Fan; Energies, 2022, 15(4), 1357; DOI:10.3390/en15041357
• 4. B. Sajadi, M.H. Saidi, A. Mohebbian; Numerical investigation of the swirling air diffuser: Parametric study and optimization; Energy Building, 2011, 43, 1329-1333
• 5. L. Zhou, F. Haghighat; Simplified Method for Modeling Swirl Diffusers; 6th Int. Conf. Indoor Air Qual. Vent. Energy Conserv. Build., Sendai, Japan, 2007, 333-340
• 6. Z. Liu, Q. Li, T. Ishihara; Numerical investigation of a swirl diffuser with a novel design using large eddy simulations; Build. Environ., 2018, 135, 124-141
• 7. Y.H. Yau, K.S. Poh, A. Badarudin; A numerical airflow pattern study of a floor swirl diffuser for UFAD system; Energy Build., 2018, 158, 525-535
• 8. K. Wójciak, P. Gaj, J.M. Kopania, G. Bogusławski; The Impact of the Damper Blade Position on the Generated Noise and Pressure Losses in Plenum Box with Swirl Diffusers; Vibrations in Physical Systems, 2019, 30, 1-8
• 9. PN-B-02151-2; Polish Standard, Building Acoustics. Protection form noise in building. Part 2: requirements on permissible sound level in room, 2018
• 10. PN-EN ISO 3741:2011; Acoustics - Determination of sound power levels and acoustic energy levels of noise sources based on sound pressure measurements - Precision methods in reverberation chambers