مهندسی مکانیک مدرس

مهندسی مکانیک مدرس

بررسی تأثیر قرار دادن محیط متخلخل بر عملکرد رگلاتورهای تقلیل فشار گاز با رویکرد کاهش نوفه جریانی

نوع مقاله : پژوهشی اصیل

نویسندگان
محسن محمدی سراسیا 1
حسین عجم 1
احمد مولودی 2
1 دانشگاه فردوسی مشهد
2 سازمان جهاددانشگاهی خراسان رضوی
چکیده
در پژوهش حاضر، تأثیر قرار دادن محیط متخلخل در رگلاتورهای تقلیل فشار گاز طبیعی بر عملکرد و کاهش شدت صدای تولید شده بررسی شده است. ابتدا این موضوع به صورت آزمایشگاهی مورد مطالعه قرار گرفت. آزمایش­ها برای دو نمونه با محیط متخلخل ppi 10 و ppi 20 و سیستم بدون محیط متخلخل انجام شد. برای بررسی اعتبار نتایج آزمایش­ها در 4 اختلاف فشار متفاوت بالادست 20، 10، 5 و 5/2 مگاپاسکال و نسبت فشار بحرانی جریان مورد ارزیابی قرار گرفت. سپس برای ارزیابی چگونگی تأثیر پارامترهای جریانی بر عملکرد رگلاتور و تراز شدت صوت، جریان سیال عبوری از رگلاتور شبیه­ سازی عددی شد. نتایج نشان می­ دهد، استفاده از محیط متخلخل ppi 10 و ppi 20، ضریب جریان را به ترتیب 7 و 15 درصد و تراز شدت صوت را به ترتیب 15 و 20 دسی­ بل کاهش می­ دهد. نتایج حاصل از شبیه­ سازی جریان سیال نشان می­دهد، قرار دادن محیط متخلخل در مسیر جریان ضمن کاهش شدت آشفتگی و منظم کردن جریان، با کاهش بیشینه سرعت سیال و کم کردن قدرت گردابه ­ها، شدت صوت تولید شده را کاهش می­دهد.
کلیدواژه‌ها
آیروآکوستیک
دینامیک سیالات محاسباتی
محیط متخلخل
رگولاتور تقلیل فشار

موضوعات

عنوان مقاله English

The effect of place the porous medium in gas pressure regulators on performance and noise reduction

نویسندگان English

mohsen mohammadi_sarasia 1
Hossein Ajam 1
ahmad moloodi 2
1 ferdowsi university of mashhad
2 Academic Center for Education, Culture and Research
چکیده English

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.

کلیدواژه‌ها English

Aeroacoustics
Computational Fluid Dynamics
Porous Medium
gas pressure regulator
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مهندسی مکانیک مدرس
دوره 21، شماره 7
تیر 1400
صفحه 429-439