In this paper a numerical approach for the prediction of the unsteady atomization process of liquid fuel in Diesel engine is presented. The dependences between the transient nozzle flow and spray formation are analysed. For that purpose models to simulate unsteady nozzle flows including the transient behaviour of cavitation and two-phase atomization process are employed. Results of transient fl...

The spray formation and breakup of n-dodecane was investigated experimentally on a common rail diesel injector using a long working distance microscope. The objectives were to further the fundamental understanding of the processes involved in the initial stage of diesel spray formation under engine-like operating conditions, i.e. high ambient pressure and temperature. Present measurements show ...

Experiments are performed to investigate the effects of fuel spray on in-cylinder mixture preparation and its impingement on cylinder walls and piston top inside a direct-injection spark-ignition engine with optical access to the cylinder. Novel image processing algorithms are developed to analyze the fuel impingement quantitatively on in-cylinder surfaces. The technique is useful to optimize t...

Polyoxymethylene dimethyl ether (PODE) is a low-viscosity oxygenated fuel that can improve the volatility of blended fuels. In this work, macroscopic and microscopic spray characteristics diesel-PODE3-4 under different ambient temperatures injection pressures (IP) are studied. The studied blends consisted pure diesel (P0), two blend fuels 20% (P20) 50% (P50) by volume fraction PODE3-4. Mie scat...

This study shows the design of a new hybrid power generation system, photovoltaic panel (PV)–coupled solid oxide fuel cell (SOFC) and gas turbine (GT)–electrolyser. Three objectives (cost, pollutant emissions, and reliability), which are usually in conflict, are considered simultaneously. The design of a hybrid system, considering the three mentioned objectives, poses a very complex problem of o...

Pressure swirl nozzles are widely applied in spray cooling, dust removal, and fuel injection. To better connect the nozzle structure with internal flow to analyze their influence on parameters, this paper designs a uses experimental measurement computational fluid dynamics simulation methods investigate of nozzle's tangential velocity axial ratio ( v τin / zin ) diversion channel eccentric dist...

This study deals with the fundamental problem of combustion dynamics in gas turbine combustors operating liquid fuel. In this framework present work proposes an academic fueled combustor sensitive to thermoacoustic instabilities, simulated via high-fidelity Large Eddy Simulations. The experimental setup addressed is SICCA-spray from EM2C laboratory featuring both stable and unstable flames depe...

Although fuel spray parameters, such as cone angle and penetration length, are crucial for developing high-efficiency high-performance combustion engines, general models predicting transient characteristics of these parameters have not been suggested. In this study, the cyclopentane at sub- transcritical conditions relevant IC engine rocket injections were experimentally evaluated. A single sim...

The characterization of atomized spray in terms its structure, break-up, and droplet morphology is crucial to analyze an engine's performance. Therefore, this study, the characteristics boron-laden slurry fuels have been evaluated experimentally through a high-speed imaging technique. rheological properties boron-loaded measured their impact on atomization behavior has qualitatively analyzed. c...