Thermal performance and flow behavior of winglets vortex generators in a circular tube
نام عام مواد
[Thesis]
نام نخستين پديدآور
Yunbo Xu
نام ساير پديدآوران
Islam, Md Didarul; Khezzar, Lyes
وضعیت نشر و پخش و غیره
نام ناشر، پخش کننده و غيره
The Petroleum Institute (United Arab Emirates)
تاریخ نشرو بخش و غیره
2016
مشخصات ظاهری
نام خاص و کميت اثر
144
يادداشت کلی
متن يادداشت
Committee members: Al Alili, Ali
یادداشتهای مربوط به نشر، بخش و غیره
متن يادداشت
Place of publication: United States, Ann Arbor; ISBN=978-1-369-37469-8
یادداشتهای مربوط به پایان نامه ها
جزئيات پايان نامه و نوع درجه آن
M.S.
نظم درجات
Mechanical Engineering
کسي که مدرک را اعطا کرده
The Petroleum Institute (United Arab Emirates)
امتياز متن
2016
یادداشتهای مربوط به خلاصه یا چکیده
متن يادداشت
Various technologies have been developed to enhance heat transfer and ultimately to develop more efficient compact heat exchanging devices. Vortex generators/turbulence promoters generate vortices which reduce boundary layer thickness and yield a better mixing of the fluid to enhance heat transfer. Vortex generators (VGs) create longitudinal vortices which do not decay until further downstream and consequently increase heat transfer coefficient with comparatively lower pressure drop in this region. In this research, thermal performance of winglets longitudinal VGs is investigated experimentally and numerically. Delta winglet VGs of different heights, attack angles and arrangements are inserted inside a pipe of inner diameter D = 52 mm. Research with and without VGs is conducted for air flow within a range of Reynolds numbers 6000 to 33000 and a constant heat flux of 694 W/m 2 on the tube surface. The influence of the winglet VGs on thermal performance and pressure dissipation is investigated through Nusselt number and friction factor.