- Sinop Üniversitesi Fen Bilimleri Dergisi
- Cilt: 8 Sayı: 2
- An Investigation on Flow Structure and Heat Transfer Characteristics of Confined Impinging Twin Jets
An Investigation on Flow Structure and Heat Transfer Characteristics of Confined Impinging Twin Jets
Authors : Yücel Özmen, Haluk Keleş
Pages : 178-201
Doi:10.33484/sinopfbd.1365843
View : 58 | Download : 61
Publication Date : 2023-12-28
Article Type : Research
Abstract :An investigation into the heat transfer performance and flow characteristics of circular twin jets was conducted using both numerical and experimental methods. The jets emanated from the lower surface and were confined to impinge perpendicularly on the upper surface. To simulate the bidimensional impinging twin jet flow field with powerful turbulence and heat transfer, Realizable k-ε and Standard k-ω turbulence models were employed. Reynolds numbers ranging from 30000 to 50000 were used in both simulations and experiments, with jet-to-jet spacing ranging from 0.5 to 2 and nozzles to target impingement plate spacing in the same range. Sub-atmospheric pressure regions were detected on the impingement surface in experimental measurements for spacing up to 1, whereas numerical results suggested that they could be found at all nozzle to target impingement plate spacings studied. A correlation was discovered between the peaks in coefficients of heat transfer on the target surface and the sub-atmospheric regions in pressure distributions.Keywords : İkiz çarpan jet, sub-atmosferik bölge, türbülans modelleri, basınç katsayısı, Nusselt dağılımı