این سایت در حال حاضر پشتیبانی نمی شود و امکان دارد داده های نشریات بروز نباشند
Iranian Journal of Chemistry and Chemical Engineering، جلد ۴۳، شماره ۱۱، صفحات ۴۱۳۳-۴۱۴۹
عنوان فارسی
چکیده فارسی مقاله
کلیدواژه‌های فارسی مقاله
عنوان انگلیسی An Experimental and Numerical Thermal Flow Analysis in a Diffuser by Inserting Different Types of Vortex Generators, Part (I)
چکیده انگلیسی مقاله The present study aims to estimate the Heat Transfer (HT) effectiveness of a diffuser roughened with different configurations of Wing Vortex Generators (WVGs), employing both empirical and numerical approaches. The velocity distribution upstream of the diffuser exhibits a uniform profile, indicating the flow is developing. The WVGs are mounted on the bottom surface
of the diffuser. It is noted that the three-pair casing has a higher improvement in HT. The Reynolds number (Re), determined from both the inlet velocity and the diffuser length, falls within the range of 13250-43000. According to the findings, the Delta-Wing Vortex Generators (DWVGs) cases show more improvement than smooth and Rectangular-Wing Vortex Generators (RWVGs) cases. Numerical results demonstrated that, in comparison to RWVGs, the use of DWVGs produced more durable horseshoe vortices, as evidenced by swirling flows. As a result, the fluid mixing increased and the Thermal Boundary Layer (TBL) shrank. Adding more pairs of vortex generators resulted in a 50% to 82% increase in the friction factor and a 90% to 129% increase in the Nusselt number (Nu) for cases with DWVGs compared to the smooth diffuser. For cases with RWVGs, the corresponding increases were 54%–86% for the friction factor (f) and 30%–60% for the Nu. It is also found that the DWVGs exhibit the most significant improvement in the Nu ratio at 2.37 and the performance evaluation (PEC) criteria at 1.9. The PEC seems to be consistently larger than one, for all of the scenarios. This illustrates the benefits of energy conservation by using these particular configurations of wing vortex generator inserts. Additionally, it is essential to mention that the three pairs of DWVGs generate longitudinal vortices similar to a horseshoe shape, while RWVGs produce a swirling flow.
کلیدواژه‌های انگلیسی مقاله Heat transfer enhancement,Diffuser,Delta-wing VGs,Rectangular-wing VGs
نویسندگان مقاله Eshagh Delavariyan |
Department of Mechanical Engineering Nour Branch, Islamic Azad University, Nour, I. R. IRAN

Ghobad Shafiei Sabet |
Department of Mechanical Engineering Shahrood Branch, Islamic Azad University, Shahrood, I. R. IRAN

Jahanfar Khaleghinia |
Department of Mechanical Engineering Nour Branch, Islamic Azad University, Nour, I. R. IRAN

Hossein Shokouhmand |
Department of Mechanical Engineering, University of Tehran, Tehran, I. R. IRAN

Naser Kordani |
Department of Mechanical Engineering, University of Mazandaran, Babolsar, I. R. IRAN

نشانی اینترنتی https://ijcce.ac.ir/article_714950_7b34fd9a937e951c0fc3a19b7162f032.pdf
فایل مقاله فایلی برای مقاله ذخیره نشده است
کد مقاله (doi)
زبان مقاله منتشر شده en
موضوعات مقاله منتشر شده
نوع مقاله منتشر شده
برگشت به: صفحه اول پایگاه   |   نسخه مرتبط   |   نشریه مرتبط   |   فهرست نشریات