... at early injection timings, which has not been observed in large-bore engines operating under RCCI at similar conditions. In this work, computational fluid dynamics (CFD) simulations were performed to investigate whether spray–wall interactions could be responsible for this result. Comparison of the spray...

... Engines Experimental Fuels Internal combustion engines Jets Sprays Combustion Ambitious targets to reduce greenhouse-gas emissions from internal combustion engines lead to an increased research focus on alternative fuels. Due to the low C/H-ratio and its global availability, natural gas...

... January 9, 2018; published online June 27, 2018. Assoc. Editor: Joseph Zelina. 21 08 2017 09 01 2018 Burners Combustion Combustors Design optimization Flame Fuel combustion Gas turbine technology Sprays Swirling Steady liquid fuel combustion is commonly used in boilers...

... Nonintrusive diagnostics Sprays Two-phase Visualization Wear The change in energy production from fossil fuels to renewable sources results in a fluctuation of the produced electric energy. To ensure grid stability, a higher flexibility of conventional power plants is getting more and more...

... and temperature. The study reveals that the quality of the diesel pilot ignition in terms of short ignition delay and a high number of ignited sprays significantly depends on the injection parameters and operating conditions. In most cases, the pilot fuel suffers from too high dilution due to its small quantity...

... with the catalyst was identified as the critical process driving the susceptibility to deposit formation. The spray of urea solution was characterized in terms of velocity distribution by means of particle-image velocimetry. Results were compared with theoretical predictions and calculation options for processes...

.... Editor: David Wisler. This work is in part a work of the U.S. Government. ASME disclaims all interest in the U.S. Government's contributions. 03 11 2017 26 02 2018 Combustion Droplet Engines Evaporation Flame Fuel combustion Power systems Sprays Thermodynamics Vaporization...

...Aron P. Dobos; Allan T. Kirkpatrick This paper studies the differences in spray structure and emissions trends between diesel and biodiesel fuels in a compression ignition engine. A computationally efficient and predictive quasi-dimensional simulation model is combined with fuel-specific physical...

... approach is able to predict the main characteristics of the flame with a good agreement with the experiment in terms of flame shape, spray characteristics and soot location. Finite-rate chemistry effects appear to be very important in the region close to the injection location leading to the lift-off...

... Experimental Film Gas turbine technology Internal flow Measurement techniques Multiphase flows Natural gas technology Sensors Sprays Temperature Two-phase Visualization 05 07 2017 18 08 2017 Contributed by the Controls, Diagnostics and Instrumentation Committee of ASME...

... in the measured data. To get a close insight into the emission formation processes in water-injected flames, local concentration measurements are used to calculate distributions of the reaction progress variable. Finally, to clarify the influence of spray quality on the composition of the exhaust gas, a variation...

... are considered. First, capabilities of FGM are evaluated on a single swirler burner operating at ambient pressure with a standard pressure atomizer for spray injection. Then, a second test case, operated at 4 bar, is simulated. Here, kerosene fuel is burned after an injection through a prefilming airblast...

...Brian T. Fisher; Michael R. Weismiller; Steven G. Tuttle; Katherine M. Hinnant In order to understand the reasons for the apparent benefits of using a flow-blurring (FB) atomizer in a combustion system, it is necessary to first examine fundamental spray characteristics under nonreacting conditions...

...Kevin Prieur; Daniel Durox; Thierry Schuller; Sébastien Candel This article reports experiments carried out in the MICCA-spray combustor developed at EM2C laboratory. This system comprises 16 swirl spray injectors. Liquid n-heptane is injected by simplex atomizers. The combustion chamber is formed...

.... 07 07 2017 12 07 2017 Droplet Evaporation Fuels Sprays Combustion References [1] Westbrook , C. K. , 2013 , “ Biofuels Combustion ,” Annu. Rev. Phys. Chem. , 64 ( 1 ), pp. 201 – 219 . 10.1146/annurev-physchem-040412-110009 [2] Lefebvre , A. H. , 1995...

... ignition are addressed in the present work. Two facilities enable the analysis of two characteristic phases of the process. The knowledge for ignition, acoustics and instabilities (KIAI)-Spray single-injector burner was investigated in terms of local flow properties, including the air velocity and droplet...

...-pass filter character of the prefilming airblast atomization phenomenon, which also introduces a significant phase shift on the dynamics of SMD of the generated spray. The models are tested in their original formulations without any calibration in order to assess their robustness versus different...

... approach for diesel engine applications is a multizone spray and combustion model pioneered by Hiroyasu and his group. It divides diesel spray into packets and tracks fuel evaporation, air entrainment, gas properties, and ignition delay (induction time) individually during the injection and combustion...

... NGINEERING FOR G AS T URBINES AND P OWER . Manuscript received February 14, 2017; final manuscript received March 5, 2017; published online April 25, 2017. Editor: David Wisler. 14 02 2017 05 03 2017 Alternative energy sources Combustion Engines Sprays Under the pressure...

... online April 25, 2017. Assoc. Editor: Nadir Yilmaz. 22 09 2016 08 03 2017 Combustion Energy Engines Fuels Sprays Combustion GDI engine is expected to improve engine performance due to its more accurate fuel mass control, less cycle-to-cycle variation, higher compression...