Pengaruh Variasi Lip Thickness pada Nozzle Terpancung terhadap Karakteristik Api Pembakaran Difusi Concentric Jet Flow
Abstract: Nozzle shape greatly
influence turbulence between the fuel, air and formation of flow recirculationzone
to produce a homogeneous mixing and get a near-perfect combustion. The
recirculation zone is area that caused by flow rate breakdown, causing vortex
and backflow around the end of nozzle. This backflow that hold up while
lowering the flame so the flow rate of fuel and air mixture maintained lower or
equal with flame speed. This study used variation of lip thickness of truncated
nozzle 0, 4, 8, 12, and 16mm.To obtain flame stability, fuel velocity and air
velocity were variated. Thermocouples were used tomeasure flame temperature and
its distribution. The results showed that stability of concentric jet diffusionflame
flow increased with narrow lip thickness on a truncated nozzle. The wider
stability area obtained in4 mm lip thickness. In addition, temperature on
diffusion flames concentric jet flow also more evenly distributed evenly with
size of the nozzle lip thickness. The highest temperature and temperaturedistribution
in the horizontal direction were occured in in the nozzle with lip thickness of
0 mm. A shadowgrapgh visualization was also used to identify phenomena of the
nozzle exit flow.
Penulis: Elka Faizal, Agung
Sugeng Widodo, Mega Nur Sasongko
Kode Jurnal: jptmesindd160655