Spray Characterization of Ethanol Gasoline Blends and Comparison to a CFD Model for a Gasoline Direct Injector

2010 ◽  
Vol 3 (1) ◽  
pp. 402-425 ◽  
Author(s):  
Atsushi Matsumoto ◽  
Wayne R. Moore ◽  
Ming-Chia Lai ◽  
Yi Zheng ◽  
Matthew Foster ◽  
...  
Keyword(s):  
Cfd Model ◽  
Spray Characterization

Performance Characterization of a Twin Scroll Volute for Turbocharging Applications

2018 ◽  
Author(s):  
Carlo Cravero ◽  
Mario La Rocca ◽  
Andrea Ottonello
Keyword(s):  
Experimental Data ◽  
Scientific Literature ◽  
Aerodynamic Performance ◽  
Operating Conditions ◽  
Automatic Design ◽  
Cfd Model ◽  
Radial Turbine ◽  
Wide Range ◽  
Partial Admission

The use of twin scroll volutes in radial turbine for turbocharging applications has several advantages over single passage volute related to the engine matching and to the overall compactness. Twin scroll volutes are of increasing interest in power unit development but the open scientific literature on their performance and modelling is still quite limited. In the present work the performance of a twin scroll volute for a turbocharger radial turbine are investigated in some detail in a wide range of operating conditions at both full and partial admission. A CFD model for the volute have been developed and preliminary validated against experimental data available for the radial turbine. Then the numerical model has been used to generate the database of solutions that have been investigated and used to extract the performance. Different parameters and indices are introduced to describe the volute aerodynamic performance in the wide range of operating conditions chosen. The above parameters can be used for volute development or matching with a given rotor or efficiently implemented in automatic design optimization strategies.

Spray Characterization of Thermal Fogging Equipment Typically Used in Vector Control1

2008 ◽  
Vol 24 (4) ◽  
pp. 550-559 ◽  
Author(s):  
W. C. Hoffmann ◽  
T. W. Walker ◽  
B. K. Fritz ◽  
T. Gwinn ◽  
V. L. Smith ◽  
...  
Keyword(s):  
Spray Characterization

Experimental and Numerical Characterization of Lean Hydrogen Combustion in a Premix Burner Prototype

2011 ◽  
Author(s):  
Iarno Brunetti ◽  
Giovanni Riccio ◽  
Nicola Rossi ◽  
Alessandro Cappelletti ◽  
Lucia Bonelli ◽  
...  
Keyword(s):  
Natural Gas ◽  
Gas Turbine ◽  
Hydrogen Content ◽  
Premixed Combustion ◽  
Nox Emissions ◽  
Cfd Model ◽  
Air Velocity ◽  
Lean Premixed Combustion ◽  
Lean Premixed

The use of hydrogen as derived fuel for low emission gas turbine is a crucial issue of clean coal technology power plant based on IGCC (Integrated Gasification Combined Cycle) technology. Control of NOx emissions in gas turbines supplied by natural gas is effectively achieved by lean premixed combustion technology; conversely, its application to NOx emission reduction in high hydrogen content fuels is not a reliable practice yet. Since the hydrogen premixed flame is featured by considerably higher flame speed than natural gas, very high air velocity values are required to prevent flash-back phenomena, with obvious negative repercussions on combustor pressure drop. In this context, the characterization of hydrogen lean premixed combustion via experimental and modeling analysis has a special interest for the development of hydrogen low NOx combustors. This paper describes the experimental and numerical investigations carried-out on a lean premixed burner prototype supplied by methane-hydrogen mixture with an hydrogen content up to 100%. The experimental activities were performed with the aim to collect practical data about the effect of the hydrogen content in the fuel on combustion parameters as: air velocity flash-back limit, heat release distribution, NOx emissions. This preliminary data set represents the starting point for a more ambitious project which foresees the upgrading of the hydrogen gas turbine combustor installed by ENEL in Fusina (Italy). The same data will be used also for building a computational fluid dynamic (CFD) model usable for assisting the design of the upgraded combustor. Starting from an existing heavy-duty gas turbine burner, a burner prototype was designed by means of CFD modeling and hot-wire measurements. The geometry of the new premixer was defined in order to control turbulent phenomena that could promote the flame moving-back into the duct, to increase the premixer outlet velocity and to produce a stable central recirculation zone in front of the burner. The burner prototype was then investigated during a test campaign performed at the ENEL’s TAO test facility in Livorno (Italy) which allows combustion test at atmospheric pressure with application of optical diagnostic techniques. In-flame temperature profiles, pollutant emissions and OH* chemiluminescence were measured over a wide range of the main operating parameters for three fuels with different hydrogen content (0, 75% and 100% by vol.). Flame control on burner prototype fired by pure hydrogen was achieved by managing both the premixing degree and the air discharge velocity, affecting the NOx emissions and combustor pressure losses respectively. A CFD model of the above-mentioned combustion test rig was developed with the aim to validate the model prediction capabilities and to help the experimental data analysis. Detailed simulations, performed by a CFD 3-D RANS commercial code, were focused on air/fuel mixing process, temperature field, flame position and NOx emission estimation.

Further Evaluation of Spray Characterization of Sprayers Typically Used in Vector Control3

2012 ◽  
Vol 28 (2) ◽  
pp. 93-101 ◽  
Author(s):  
W. Clint Hoffmann ◽  
Todd W. Walker ◽  
Bradley K. Fritz ◽  
Muhammad Farooq ◽  
Vincent L. Smith ◽  
...  
Keyword(s):  
Spray Characterization

Spray characterization of gasoline-ethanol blends from a multi-hole port fuel injector

Fuel ◽  
2012 ◽  
Vol 102 ◽  
pp. 613-623 ◽  
Author(s):  
T.N.C. Anand ◽  
A. Madan Mohan ◽  
R.V. Ravikrishna
Keyword(s):  
Fuel Injector ◽  
Ethanol Blends ◽  
Spray Characterization

Spray Characterization of Ultra-low–volume Sprayers Typically Used in Vector Control1

2009 ◽  
Vol 25 (3) ◽  
pp. 332-337 ◽  
Author(s):  
W. Clint Hoffmann ◽  
Todd W. Walker ◽  
Bradley K. Fritz ◽  
Muhammad Farooq ◽  
Vincent L. Smith ◽  
...  
Keyword(s):  
Low Volume ◽  
Spray Characterization

Near-field spray characterization of a spill return atomizer using a PIV laser sheet

Fuel ◽  
2021 ◽  
Vol 289 ◽  
pp. 119792
Author(s):  
H.A. Moneib ◽  
Ahmed Mahfouz ◽  
Ahmed El-Fatih ◽  
Ahmed Emara
Keyword(s):  
Laser Sheet ◽  
Near Field ◽  
Spray Characterization

Internal Flow and Spray Characterization of Multi-Hole Injectors: Comparison with Single-Hole Injectors

2020 ◽  
Vol 34 (6) ◽  
pp. 7490-7501 ◽  
Author(s):  
Yu Jin ◽  
Pengbo Dong ◽  
Chang Zhai ◽  
Keiya Nishida ◽  
Yoichi Ogata ◽  
...  
Keyword(s):  
Internal Flow ◽  
Single Hole ◽  
Spray Characterization
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