Volume 21, Issue 7 (July 2021)                   Modares Mechanical Engineering 2021, 21(7): 429-439 | Back to browse issues page

‎ 20.1001.1.10275940.1400.21.7.1.1

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mohammadi_sarasia M, Ajam H, moloodi A. The effect of place the porous medium in gas pressure regulators on performance and noise reduction. Modares Mechanical Engineering 2021; 21 (7) :429-439
URL: http://mme.modares.ac.ir/article-15-36931-en.html
The effect of place the porous medium in gas pressure regulators on performance and noise reduction
Mohsen Mohammadi_sarasia1 , Hossein Ajam2 , Ahmad Moloodi * 3
1- ferdowsi university of mashhad
2- Ferdowsi University of Mashhad
3- Academic Center for Education, Culture and Research , ahmad_moloodi@yahoo.com
Abstract:   (1431 Views)
In the present study, the effect of the porous medium in natural-gas pressure regulators, on the operation and reduce the intensity of the sound produced, is studied. First, it was studied experimentally. Experiments apply for the porous medium 20 ppi (pores per inch) and 10 ppi and non-porous system. To check the validity of the results, experiments were evaluated in four different pressure upstream 20, 10, 5, and 2.5 MPa on the critical pressure ratio. Afterward, for evaluation of the flow parameters on the performance of regulators and the sound intensity level, numerical simulation of fluid flow was performed. The results show that the use of porous media for 10 ppi and 20 ppi, flow coefficient decrease, respectively 7% and 15%, and sound intensity level decrease, respectively 25 and 30 dB. The amount of porosity does not have much effect on the sound intensity. On the other hand, the results of the fluid flow simulation show that placing the porous medium in the flow direction reducing the turbulent intensity and regulating the flow. As well, it decreases the sound intensity by decreasing the maximum velocity and the vortex power.
Keywords: Aeroacoustics, computational fluid dynamics, porous medium, gas pressure regulator
Full-Text [PDF 889 kb]   (776 Downloads)    
Article Type: Original Research | Subject: Gas Dynamics
Received: 2019/09/30 | Accepted: 2021/02/20 | Published: 2021/07/1
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