مشخصات پژوهش

عنوان	Influence of co/counter arrangements of multiple twisted-tape bundles on heat transfer intensification
نوع پژوهش	مقاله چاپ‌شده در مجلات علمی
کلیدواژه‌ها	Heat transfer intensification, Multiple tapes, Swirling flow, Twisted tape bundle.
چکیده	Heat transfer intensification in tubes containing multiple twisted-tape bundle inserts was experimentally investigated. The experimental parameters included the tape numbers (N) of 2, 4 and 6 pieces, tape twist ratios (y/w) of 4.0, 5.0 and 6.0) and two different tape arrangements: co-swirl tapes (CoT) and counter-swirl tapes (CT). The tests were carried out using air as the working fluid under a constant heat flux. The experimental results showed that all multiple twisted tape bundles caused higher heat transfer rates, pressure losses and thermal hydraulic performance than a typical twisted tape. The heat transfer rate (Nu) and friction factor (f) increased with the number of tapes (N) and decreased with the twist ratio (y/w). At similar operating conditions, the counter-swirl flow twisted tape sets (CT) provided higher heat transfer (Nu) and friction factors (f) than the co-swirl flow sets (CoT). The highest thermal hydraulic performance (η) of 1.33, was offered by the twisted tapes having y/w = 4.0 and N = 6 at Re = 6000.
پژوهشگران	وارسا چوواتتاناکول (نفر ششم به بعد)، خوانچیت وونگ چاری (نفر پنجم)، پتپیکس یامساآرد (نفر چهارم)، رضا بیگزاده (نفر سوم)، وایو چانگ چاروئن (نفر دوم)، اسمیت یامساآرد (نفر اول)