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Yuhao Xu
Cornell University
20Publications
7H-index
232Citations
Publications 21
Newest
#1Yuhao Xu (PV: Prairie View A&M University)
Last.Dan PhillipsH-Index: 1
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This paper reports new results about the combustion dynamics of hydroprocessed renewable jet fuel droplets derived from heterotrophic algae (AHRJ) burning under conditions that promote one-dimensional transport dynamics and near spherically symmetric burning conditions. Results are compared between Jet-A and three AHRJ/Jet-A mixtures containing 25%, 50%, and 75% AHRJ by volume. The results show that AHRJ droplets burn slightly faster than Jet-A and have a significantly reduced sooting propensity...
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#1Tanvir FaroukH-Index: 18
#2Yuhao XuH-Index: 7
Last.Frederick L. DryerH-Index: 68
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#1Tanvir Farouk (USC: University of South Carolina)H-Index: 18
#2Yuhao Xu (Cornell University)H-Index: 7
Last.Frederick L. Dryer (Princeton University)H-Index: 68
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Abstract We report experiments and detailed numerical modeling of mixtures of primary reference fuel (PRF) droplets consisting of n -heptane and iso -octane with initial droplet diameters of 0.5 and 3.51 mm. The results show a quasi-steady, low temperature (or “Cool Flame” ( CF )) droplet burning mode that stems from a varying two-stage chemical kinetic behavior of the combustion chemistry. The simulations further illustrate, that the CF droplet burning mode in 1 atm air is dependent upon the is...
6 CitationsSource
#1Yuhao Xu (Cornell University)H-Index: 7
#2Michael C. Hicks (Glenn Research Center)H-Index: 8
Last.C. Thomas Avedisian (Cornell University)H-Index: 14
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Abstract The burning characteristics of iso -octane droplets in the standard atmosphere are reported over a large range of initial droplet diameters (0.5 mm D o 5 mm) for near one-dimensional droplet flames as promoted by low gravity. A ground-based drop tower and a space-based platform (International Space Station) were used to provide an environment to examine the influence of D o that encompasses regimes where radiation does not have an effect on burning to where it does. For D o K ) was near...
3 CitationsSource
#1Yu Cheng Liu (UM: University of Michigan)H-Index: 11
#2Yuhao Xu (Cornell University)H-Index: 7
Last.C. Thomas Avedisian (Cornell University)H-Index: 14
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Abstract This paper reports the results of a comprehensive experimental study on the effect of initial droplet diameter ( D o ) over a very wide range (0.5 mm D o n -heptane, n -octane and n -decane – that are representative of components found in petroleum-based transportation fuels and their surrogates. Spherical symmetry in the burning process was promoted by carrying out the experiments in a reduced convection (stagnant ambience) and buoyancy (low gravity) environment using the facilities of...
18 CitationsSource
#1Yu Cheng Liu (UM: University of Michigan)H-Index: 11
#2Fahd E. Alam (USC: University of South Carolina)H-Index: 4
Last.Tanvir Farouk (USC: University of South Carolina)H-Index: 18
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Abstract This study reports results of experiments on the isolated droplet burning characteristics of butanol isomers ( n -, iso -, sec -, and tert -) under standard atmosphere conditions in an environment that promotes spherical combustion. The data are compared with predictions from a detailed numerical model (DNM) that incorporates complex combustion chemistry, radiative heat transfer, temperature dependent variable fluid properties, and unsteady gas and liquid transport. Computational predic...
7 CitationsSource
#1Yuhao Xu (Cornell University)H-Index: 7
#2Ivan Keresztes (Cornell University)H-Index: 19
Last.C. Thomas Avedisian (Cornell University)H-Index: 14
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Abstract Fuels derived from bio-feedstocks have received significant attention for their potential to reduce the consumption of petroleum-based liquid fuels, either through blending or direct use. Biofuels produced from heterotrophic microalgae are particularly attractive because of fast conversion of sustainable plant sugars into renewable oils of controllable quality and composition, but without the need for sunlight or carbon from the atmosphere for growth. This paper describes the results of...
14 CitationsSource
#1Yuhao Xu (Cornell University)H-Index: 7
#2C. Thomas Avedisian (Cornell University)H-Index: 14
Source
#1Yuhao Xu (Cornell University)H-Index: 7
#2Meilin Dong (Cornell University)
Last.C. Thomas Avedisian (Cornell University)H-Index: 14
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Bio-derived fuels have received significant attention for their potential to reduce the consumption of petroleum-based liquid fuels, either through blending or direct use. Bio-feedstocks that employ algae, in particular heterotrophic microalgae, which convert sustainable plant sugars into renewable oils are especially attractive because the sugar that feeds this process can come from many sources — from sugarcane to corn, and even waste biomass, also known as cellulosic sugars. The microalgae gr...
Source
Fuels derived from biofeedstocks are receiving attention for their potential as additives to conventional petroleum-based transportation fuels. Normal butanol, in particular, can enhance performance compared to ethanol because of its higher energy density. To better understand the combustion dynamics of n-butanol in the context of gasoline, experiments are reported here to examine the isolated droplet combustion characteristics of an 87 octane (ethanol-free) gasoline and a mixture of gasoline (0...
14 CitationsSource
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