For ic engine......equation for co-efficient of heat transfer

There have been a number of studies on air-cooling  of aircooled engine fins. Table 1 shows the experimental  cylinders
and air velocity investigated by other researchers. They acquired
data on cylinder cooling at relatively high air velocity. Some
researchers tested at air velocity from 7.2 to 72 km/h to enable
the fin design of motorcycle engines but did not investigate
temperature distribution in the fin circumference in detail. An
experimental equation of the fin surface heat transfer coefficient
using a copper cylinder at air velocity from 32 to 97 km/h was
derived by the researchers as follows.



α = 241.7{ 0.0247 − 0.00148 (h^0.8 /p^0.4) }u^0.73             (1)



where,
= Fin surface heat transfer coefficient, W/m^2*k , h = Fin length,
mm, p = Fin pitch, mm, u = Air velocity, km/h


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