![]() ![]() A combination of several optical techniques was employed to fully transparent injector models, compound metal-glass and full metal injectors. Linne, M.Ī consolidated effort at optically characterising flow patterns, in- nozzle cavitation, and near- nozzle jet structure of a marine diesel fuel injector is presented. ![]() Interior flow and near- nozzle spray development in a marine-engine diesel fuel injector In engine performance effect, all of the nozzles have examined and the five holes nozzle provided the best result in indicted power, indicated torque and ISFC in any different engine speeds. Semin, Yusof, Mohd Yuzri Mohd Arof, Aminuddin Md Shaharudin, Daneil Tomo Ismail, Abdul RahimĪll of the injector nozzle holes have examined and the results are shown that the seven holes nozzle have provided the best burning result for the fuel in-cylinder burned in any different engine speeds and the best burning is in low speed engine. An ensemble of nozzles were mechanically tested to prove this design concept.Įffect of Injector Nozzle Holes on Diesel Engine Performance This nozzle is supported from the outside with sapphire clamps, which reduces tensile stresses in the nozzle and increases the nozzle's injection pressure capacity. The design uses an acrylic nozzle, which is ideal for imaging the interior flow. An OTN design that achieves realistic injection pressures and grants visual access to the interior flow and spray formation will be explained in detail. This goal has not been achieved until now because interior structures can be very complex, and the most appropriate optical materials are brittle and easily fractured by realistic fuel pressures. Our goal in this work is to design various OTN concepts that mimic the flow inside commercial injector nozzles, at realistic fuel pressures, and yet still allow access to the very near nozzle region of the spray so that interior flow structure can be correlated with primary breakup dynamics. A number of studies in recent years have used injectors with optically transparent nozzles (OTN) to allow observation of the nozzle orifice flow. However, it is known that nozzle orifice flow and cavitation have an important effect on the formation of fuel injector sprays, even if the exact details of this effect remain unknown. Spray formation, or rather the transition from a cylindrical liquid jet to a field of isolated droplets, is not completely understood. Direct-injection engines have become more common due to their increased practical flexibility and efficiency, and sprays dominate mixture formation in these engines. The efficiency and emissions of internal combustion (IC) engines are closely tied to the formation of the combustible air-fuel mixture. ![]() Novel design for transparent high-pressure fuel injector nozzles Injector manufacturers regard twin nozzle injectors as a promising approach to facilitate stable spray patterns independent of t. The twin nozzle differs from the conventional configuration by utilizing two closely spaced orifices to substitute each orifice in the conventional nozzle. But in light of the new marine emission legislations the twin nozzle concept has arisen. ![]() Numerical Simulation of Twin Nozzle Injectorsįuel injectors for marine applications have traditionally utilized nozzles with symmetric equispaced orifice configuration. ![]()
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