OH, PAH, and sooting imaging in piloted liquid-spray flames of diesel and diesel surrogate

2021 ◽  
Vol 231 ◽  
pp. 111479
Author(s):  
Yejun Wang ◽  
Ayush Jain ◽  
Christian Schweizer ◽  
Waruna D. Kulatilaka
Keyword(s):  
Spray Flames ◽  
Liquid Spray

Correction: Experimental Characterizations of Ethanol and Jet-A Liquid Spray Flames

2018 ◽  
Author(s):  
Yue Wu ◽  
Mark Gragston ◽  
Zhili Zhang
Keyword(s):  
Spray Flames ◽  
Liquid Spray

Experimental Characterizations of Ethanol and Jet-A Liquid Spray Flames

2018 ◽  
Author(s):  
Yue Wu ◽  
Mark Gragston ◽  
Zhili Zhang
Keyword(s):  
Spray Flames ◽  
Liquid Spray

Investigation of Flow-Flame Interactions in Kerosene Piloted Liquid-Spray Flames Using Simultaneous OH and PAH PLIF

2020 ◽  
Author(s):  
Ayush Jain ◽  
Yejun Wang ◽  
Christian Schweizer ◽  
Waruna D. Kulatilaka
Keyword(s):  
Spray Flames ◽  
Liquid Spray

CO Imaging in piloted liquid-spray flames using femtosecond two-photon LIF

2019 ◽  
Vol 37 (2) ◽  
pp. 1305-1312 ◽  
Author(s):  
Yejun Wang ◽  
Ayush Jain ◽  
Waruna Kulatilaka
Keyword(s):  
Two Photon ◽  
Spray Flames ◽  
Liquid Spray

Combustion Characterization of a Fuel-Flexible Piloted Liquid-Spray Flame Apparatus Using Advanced Laser Diagnostics

2019 ◽  
Author(s):  
Yejun Wang ◽  
Tyler Paschal ◽  
Waruna D. Kulatilaka
Keyword(s):  
Heat Release ◽  
Reaction Zone ◽  
Gas Turbines ◽  
Laser Diagnostics ◽  
Direct Injection ◽  
Liquid Fuels ◽  
Spray Flame ◽  
Spray Flames ◽  
Liquid Spray ◽  
Dynamic Structures

Abstract Primary energy sources for aviation gas turbines as well as direct-injection gasoline and diesel engines come in the form of liquid hydrocarbon fuels. These liquid fuels are atomized and mixed with air, prior to highly turbulent combustion and heat release processes inside engine hardware. Designing more efficient and cleaner gas turbine engines is hence dependent on the in-depth understanding of spray formation, mixing, heat release, combustion dynamics, and pollutant formation pathways in liquid-fuel spray flames. As compared to gaseous fuels, the additional steps of atomization, dispersion, and evaporation prior to turbulent mixing need to be considered for a variety of liquid fuels to enable fuel-flexible operation of these combustion hardware. Such studies can be largely facilitated by advanced laser diagnostics applied to simplified piloted liquid-spray flame configurations that can also be numerically modeled using well-defined boundary conditions. In this work, a modified configuration of a fuel-flexible piloted liquid-spray flame apparatus is used for detailed laser diagnostics studies using hydroxyl (OH) planar imaging. The configuration consists of a modified McKenna flat-flame burner fitted with a direct-injection high-efficiency nebulizer. OH radical is a primary marker of the reaction zone and a key indicator of the heat release process in flames. OH is abundant in the high-temperature combustion regions providing high signal-to-noise ratio single-laser-shot images revealing flame dynamics and instabilities. Therefore, OH planar laser-induced fluorescence (PLIF) is employed to characterize the dynamic structures of a range of piloted liquid-spray flames operated with methanol (CH3OH), n-Heptane (C7H16), iso-Octane (C8H18), dodecane (C12H26), gasoline (C4–C12), diesel (C12–C20), and kerosene (C6–C16). Single-shot and averaged OH-PLIF images show the presence of strong turbulence in the core region above the surface of the McKenna burner. The reaction zone mainly occurs around the periphery of this region, then it spreads more uniformly due to evaporation of liquid droplets downstream of the spray flame. Two-color OH PLIF thermometry in liquid spray flames operated with gasoline, diesel and kerosene, has been shown that the combustion temperature is in the range of 1200–2000 K. Overall, OH PLIF has been demonstrated to be an efficient approach for dynamic structures and temperature measurements in piloted liquid-spray flames operated with realistic fuels.

Piloted Liquid Spray Flames: A Numerical and Experimental Study

2019 ◽  
Vol 192 (10) ◽  
pp. 1887-1909
Author(s):  
Yejun Wang ◽  
Salar Taghizadeh ◽  
Anurag S. Karichedu ◽  
Waruna D. Kulatilaka ◽  
Dorrin Jarrahbashi
Keyword(s):  
Experimental Study ◽  
Spray Flames ◽  
Liquid Spray

The effects of injection rate of gaseous additives on the characteristics of liquid spray flames

1997 ◽  
Vol 38 (10-13) ◽  
pp. 1073-1081 ◽  
Author(s):  
S.R. Gollahalli ◽  
R. Puri
Keyword(s):  
Injection Rate ◽  
Spray Flames ◽  
Liquid Spray

Measurement of heat loss due to thermal radiation of liquid spray flames using shock tube technique

1988 ◽  
Vol 21 (1) ◽  
pp. 473-479 ◽  
Author(s):  
Takao Tsuboi ◽  
Tomo Sato ◽  
Yasunobu Kaneko ◽  
Tomohiro Nakajima ◽  
Satoshi Ita ◽  
...  
Keyword(s):  
Thermal Radiation ◽  
Shock Tube ◽  
Heat Loss ◽  
Spray Flames ◽  
Liquid Spray

EXPERIMENTS ON AIR-ASSIST SPRAY AND SPRAY FLAMES

2001 ◽  
Vol 11 (6) ◽  
pp. 14 ◽  
Author(s):  
Sang Heun Oh ◽  
Dong Il Kim ◽  
Min Su Paek
Keyword(s):  
Spray Flames

SPRAY FLAMES OF THREE-COMPONENT FUEL BLENDS IN A POROUS MEDIA BURNER AT LEAN CONDITIONS

2017 ◽  
Author(s):  
Flavio I. Moreno ◽  
Ramkumar N. Parthasarathy ◽  
Subramanyam R. Gollahalli
Keyword(s):  
Porous Media ◽  
Fuel Blends ◽  
Spray Flames ◽  
Porous Media Burner ◽  
Lean Conditions
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