purpose : to evaluate the intraocular pressure (iop) rising effect of anterior versus posterior subtenon injection of triamcinolone in eyes with retinal vein occlusion methods : this prospective nonrandomized study was performed on 57 eyes of 57 patients with macular edema due to retinal vein occlusion. 26 eyes received posterior subtenon injection of 40 mg triamcinolone acetonide [pstt] and 31...

• A three-stage behavior of tip penetration in ammonia jets are proposed. The and methane have similar S , α fuel mole fractions at jet axis. hyperbolic decays concentrations the axis confirmed. Fuel increase with increased P inj but reduce a . Ammonia show distinct flammable mixture distributions. direct-injection gaseous is possible way to engines meet scenario zero-carbon emission. In this s...

Synchrotron x-radiography and a fast x-ray detector were used to record the time evolution of the transient fuel sprays from a high-pressure injector. A succession of 5.1-microsecond radiographs captured the propagation of the spray-induced shock waves in a gaseous medium and revealed the complex nature of the spray hydrodynamics. The monochromatic x-radiographs also allow quantitative analysis...

__________________________________________________________________________________________________ Author’s Biography O. Bunes is MSc (1996) from the Department of Marine Technology, NTNU. He is employed as Research Engineer, Division of Machinery and Technical Operations at MARINTEK, an independent research and development company in Trondheim, Norway. Mr Bunes has been working with modelling ...

The preparation of air–fuel mixture is considerably dependent on fluid flow dynamics to achieve improved performance, efficiency, and engine combustion in the appearance of flow. In this study, the effects of mixtures of hydrogen and compressed natural gas (CNG) on a spark ignition engine are numerically considered. This article presents the results of a direct-injection engine using methane–hy...

The article discusses the results of experimental studies on course pyrolysis oil injection through high-pressure injector a direct-injection engine. used for tests was derived from waste plastics (mainly high-density polyethylene—HDPE). This then distilled. also describes production technology this laboratory scale. It presents chemical composition raw and after distillation process using GC-M...

Industrial trends are presenting major challenges and opportunities for research on two-phase flows in microchannels. Semiconductor companies are developing 3D circuits for which multilevel microfluidic cooling is important. Gas delivery microchannels are promising for PEM fuel cells in portable electronics. However, data and modeling are needed for flow regime stability, liquid entrainment/clo...

The driver is for a direct injection engine with 2 to 4 cylinders. There is one injector for every cylinder. To guarantee the pressure to be constant during every single injection stroke not more than 4 concurrent injections may be performed. As a consequence, for engines with at most 4 cylinders, every cylinder may be considered independent. Therefore, we may focus on the design of the driver ...

nowadays, utilization of blended fuel in internal combustion engine is one of main topics in vehicle industries. the synergy effect will be highlighted when the potential of each fuel is employed and the engine performance will improve consequently.  in this research, the laminar flame speed of methane (main component of reference fuel for natural gas) and isooctane (main component of reference...