Review on Enhanced Heat Transfer Techniques using Modern Technologies for 4S Air Cooled Engines

Engine performance is a biggest challenge and a vital area of concern when it comes to
automobiles. Researchers across the globe have been working decades together meticulously improvising the
performance of engine in terms of efficiency. The durability of the engine components mainly depends on the
thermal stress it undergoes over the period of operation. Air cooling of engine is the simplest and most
desirous technique that has been adopted for ages. In this regard fins or extended surfaces are employed for
effective cooling of the cylinder while in operation. The conductive and convective heat transfer rate from the
cylinder to the fins and in turn from the fins to surrounding ambience determines the effective performance of
the engine. In this paper an attempt is made to review and summarize the various researches that were
conducted on the Fins in terms of profile geometry, number of fins, size, thickness factor, material used etc.,
and to bring about a long term solution with the modern technologies like nano coatings and nano materials.