出版社：National Defense University Barbaros Naval Sciences and Engineering Institute Journal of Naval Science and Engineering
摘要：The swirl flow devices like twisted tape,winglet,groove,conical ring,wire coil etc.have been used as passive heat transfer augmentation technique.Especially,twisted tape devices have been applied in thermal engineering systems such as boilers,heat exchangers,water heater.Many researches using swirl flow devices particularly twisted tape with different geometries for heat transfer enhancement have been published.In this paper,different modified twisted tapes which had examined in previous studies were compared with each other with regard to heat transfer augmentation.Heat transfer,friction factor and thermal-hydraulic performance factor characteristics were investigated separately under the same conditions such as same twisted ratios and same Reynolds number values.Twisted tape which gives best heat transfer and friction factor results was determined.Derived empirical correlations which had been found by researchers were used for comparison between twisted tapes.
其他摘要：Burgu eleman,kanatçık,oluk,konik halka,tel sargı vb.gibi girdap akış cihazları pasif ısı transferi iyileştirme teknikleri olarak kullanılmaktadır.Özellikle,burgu elemanlar,kazan,ısı değiştiricisi,su ısıtıcı gibi ısıl mühendislik sistemlerinde uygulanmakta
