Vbrtcx gcncrator can produce a 加 rbulcncc and longitudinal vorticcs and control the separation point on the tubc surfacc , and thcn augmcnt an impinging arca ofthe now Qn thc fin surfacc . 【 n order to dct己rmin じ the best configuration ofvortcx gcncrator , it is noccssary to know the cff6cts of vortcx gcncrator on the flow and hcat transfbr characteristics ovcr thc tubc and fin surfacc . In this study , we uscd louvc ト typc vortex generator and tricd to find out thc ef 艶 ct of vQrtex gencrator on thc flow and hcat transfer charactcristics . Asarcsul 亡 , using a vortex generator , thc scparation point on し hc tubc moved tQ downstrcam up tQ l 30 °frorn thc f ヤ on 亡stagnation point and thc dcad watcr rcgion wa5 decreascd . Then . the hcat transfcr characteristics bchind the cylinder wcrc improved significantly 」 The m 巳 an ハ伽∬ 8 々 number on thc tubo wlth vortcx generator was increascd up to maximum 57% than the p匸 anc fin . κey 怖b 厂 ds: Fin − tube heat exchanger , F ' ow and heat transfer contrc ) 1, Vortex genera め 燗 e ∂t transfer e 肋 a ηceme η'
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