Heat transfer enhancement and development of correlation for turbulent flow through a tube with triple helical tape inserts

Heat transfer performance for turbulent flow through a tube using double helical tape inserts

“…The experimental setup used for the present study was same as that used in Bhuiya et al [17] for triple helical tape inserts and was explained in this section. The experimental facility consists of an inlet section, a test section, an air supply system (Electric blower) and a heating arrangement.…”

“…Pethkool et al [16] experimentally investigated the augmentation of convective heat transfer in a single-phase turbulent flow using the helically corrugated tube. Bhuiya et al [17] experimentally studied the heat transfer enhancement and developed new correlations for turbulent flow through a tube with triple helical tape inserts. Ibrahim [18] investigated the heat transfer and fluid friction characteristics in horizontal double pipe flat tubes with full legth helical screw inserts of different twist ratio and helical screw inserts of different spacer length.…”

Experimental Study on Heat Transfer and Friction Factor Characteristics in Laminar Flow Through Tubes of Shell and Tube Heat Exchanger Fitted With Twisted Tapes With Baffles

“…M.M.K. Bhuiya et al [6] experimentally studied influence of triple helical tapes inserted for turbulent flow through a tube on heat transfer enhancement. Triple helical tapes with different helix (α=90 130 170) are used for experiment, author observed that, the helical tape with helix angle 90 gives maximum heat flux compared to other helical tapes.…”

Heat transfer enhancement by helical screw tape coupled with rib turbulators

“…Helical screw tapes (HSTs) have been used to introduce a swirl or turbulent near the tube wall which results in more efficient fluid mixing between near wall and core regions. The tapes were extensively modified for heat transfer enhancement such as regularly-spaced helical tape [11][12][13], helical screw-tape with/without core-rod [14,15], right-left helical screw tape [16][17][18], double helical tapes [19], triple helical screw tapes [20], co/counter helical screw tape [21] and double/triple helical twisted tapes [22].…”

“…Sivashanmugam and Nagarajan [16] and Jaisankar et al [18] proved that the heat transfer coefficients and thermal performance factors given by right-left HST inserts were higher than those given by conventional HST. The triple HSTs invented by Bhuiya et al [20] gave thermal performance based on constant blower power as high as 3.7. Eiamsa-ard et al [21] reported that the helically twisted tapes inducing co-swirl flows (co-HTT) gave lower heat transfer coefficient and friction factor but higher thermal performance factor than the helically twisted tapes inducing counter-swirl flows (C-HTT).…”