Droplet combustion behavior of oxidatively degraded methyl laurate and methyl oleate in microgravity

Ando, Seiichiro; Wu, Yuxiang; Nakaya, Shinji; Tsue, Mitsuhiro

doi:10.1016/j.combustflame.2019.12.042

Cited by 25 publications

(8 citation statements)

References 50 publications

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“…Methyl oleate in the engine application shows reduction in ignition delay, soot formation compare to diesel because the higher Cetane number, Peak pressure, gross heat release rate and specific fuel consumption is lower because of lower heating value, NOX is formed because of higher combustion temperate in the presents of excess oxygen. So NOX formation is also lesser because of lesser heating value of the Methyl oleate (11,12). In the reaction time 25.25, 24.464 is found that Methyl palmitate (Hexadecanoic acid, methyl ester), C17H34O2 is about 33.6 percentage present in the biofuel.…”

Section: Fuel Characterization Ftirmentioning

confidence: 96%

Analysis of Prosopis juliflora Methyl Ester as a Fuel in the CI Engine

Duraisamy

Velmurugan

2022

Int J Res Rev

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As the availability of fossil fuels continues to decrease, the quest for alternative fuels that can be utilised in place of conventional fuels is increasing rapidly. The Prosopis juliflora oil (JFO) is a potential fuel for diesel engines, and the rising availability of the seeds in India, makes it a realistic option for CI engine fuel. In a CI engine, the high viscosity of the oil decreases performance and increase the emission characteristics. Trans-esterification is used to improve the fuel characteristics and reduce the viscosity of the fuel oil. The name for trans-esterified JFO is Prosopis juliflora methyl ester (JFME). Fourier transform infrared spectroscopy (FTIR) and gas chromatography–mass spectrometry (GC–MS) are utilised to determine the species composition of this fuel. C-H stretching alkane group, C=O methyl ester group, CH3 bending alkane group, and C-O stretching ester group are detected by FTIR. According to GCMS, methyl oleate is present at 43.34 percent whereas methyl palmitate is present at 28.99 percent. Both esters have great fuel qualities and JFME is the most suitable fuel for diesel engines. The performance findings demonstrate that JFME has a greater thermal efficiency than JFO and a lower thermal efficiency than diesel. This can be enhanced further by combining various fuels. Keywords: Prosopis juliflora oil, Transesterification, FTIR, GCMS, performance.

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Section: Fuel Characterization Ftirmentioning

confidence: 96%

Analysis of Prosopis juliflora Methyl Ester as a Fuel in the CI Engine

Duraisamy

Velmurugan

2022

Int J Res Rev

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“…Prinsip menghitung burning rate constant adalah dengan membagi kuadrat diameter awal droplet dengan total droplet lifetime yang dievaluasi dari awal api menyala hingga api padam. Perbedaan kecenderungan pada burning rate berkaitan dengan perbedaan properti bahan bakarnya dan nilai burning rate yang lebih tinggi berkaitan dengan dekomposisi termal bahan bakar mejadi molekul-molekul yang lebih kecil ketika terpapar temperatur yang tinggi selama periode ignition delay [43,44].…”

Section: Burning Rate Constantunclassified

“…Diameter droplet untuk menghitung burning rate constant merupakan diameter droplet efektif yang didefinisikan sebagai diameter ekuivalen yang diperoleh berdasarkan luasan droplet pada waktu (t) spesifik [43]. Pada grafik, nilai burning rate constant pada asam laurat, asam miristat, asam palmitat, asam stearat, asam oleat, dan asam linoleat berturut-turut adalah sebesar 1,408 mm 2 /s, 1,705 mm 2 /s, 1,819 mm 2 /s, 2,184 mm 2 /s, 1,154 mm 2 /s, dan 1,126 mm 2 /s.…”

Section: Gambar 7: Burning Rate Constantunclassified

Pengaruh Panjang Rantai Karbon dan Derajat Ketidakjenuhan terhadap Karakteristik Pembakaran Droplet Asam Lemak Tunggal

Ibadurrohman

Hamidi

Yuliati

2021

JRM

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This study aimed to investigate the effect of the different carbon chain lengths and the degree of unsaturation of six fatty acids as the constituent of vegetable oils. The droplet combustion was carried out at an ambient temperature and atmospheric pressure. The variation in the carbon chain length and the degree of unsaturation resulted in different physical and chemical properties of the fuel, which affect the droplet combustion characteristics. The increase of the carbon chain length results in longer ignition delay times and shorter burning durations, as well as higher droplet temperatures, burning rate constant, and specific power output. Conversely, an increase in the degree of unsaturation with the presence of double bond results in shorter ignition delay and longer burning duration, as well as higher droplet temperatures, but lower burning rate constant and specific power output. The droplet diameter evolution divides the combustion period into unsteady burning zones and quasi-linear burning zones. The flame dimension of unsaturated fatty acid is higher due to the soot formation at the top of the flame. A bluish flame related to the higher oxygen content in the molecule can be observed in saturated fatty acids. The short-chain saturated fatty acid has a large non-luminous zone because they are rich in oxygen. In contrast, the long-chain saturated fatty acid has a narrow non-luminous zone with high flame radiation.

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“…1 It is also an important process encountered in the development of droplet-based equipment and industrial techniques, 2 while a better understanding and control of the dynamics of the impacting droplets play a vital role in a wide variety of applications, such as plasma spraying, 3 inkjet printing, 4 three-dimensional printing, 5,6 spray cooling, 7,8 spray coating, 9 pesticide and herbicide delivery, 10,11 criminal forensics, 12 precision molten drop deposition, and oil droplet impingement on the walls in combustion engines. 13 Due to the practical importance and scientific significance, both experimental 14−22 and computational 23−26 tools have been used extensively for years to investigate the droplet dynamics and reveal the underlying mechanism of droplet−solid interactions since Worthington first focused on this issue. 27 Generally, for a normal impact process, the droplet may have some common dynamics characteristics, i.e., spreading, splashing, retraction, deposition, or rebounding, which are strongly dependent on the properties of the liquid droplet and solid substrate as well as the impact velocity.…”

Section: ■ Introductionmentioning

confidence: 99%

Impact of Droplets on Surfaces Designed with Wettability-Gradient Properties: Directional Migration, Oblique Rebound, and Reduced Contact Time

Li,

Liang,

et al. 2024

Langmuir

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Efficiently regulating the rebound behavior of droplets post-impact is crucial for various fields, mainly including the development of self-cleaning applications, the design of surface functional materials, and the advancement of industrial techniques. By performing molecular dynamics simulations, we investigated the impact and jumping behavior of droplets on heterogeneous substrates with different wetting regions. We found that, during the impacting evolution process, the retracted droplets would move toward regions with stronger wettability due to the unbalanced force caused by the wettability difference, revealing the directional migration ability. The values of the wettability difference strongly affect the degree of oblique rebound and contact time when droplets can jump off the substrate. We then designed the surfaces with a wettability gradient and found that the oblique rebound angle could be well controlled and the contact time further reduced. Our findings may provide valuable insight into the relationship between the wettability gradient and the behavior of liquid droplets on surfaces, with broad implications for various fields such as surface engineering, materials science, microfluidics, etc.

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Droplet combustion behavior of oxidatively degraded methyl laurate and methyl oleate in microgravity

Cited by 25 publications

References 50 publications

Analysis of Prosopis juliflora Methyl Ester as a Fuel in the CI Engine

Analysis of Prosopis juliflora Methyl Ester as a Fuel in the CI Engine

Pengaruh Panjang Rantai Karbon dan Derajat Ketidakjenuhan terhadap Karakteristik Pembakaran Droplet Asam Lemak Tunggal

Impact of Droplets on Surfaces Designed with Wettability-Gradient Properties: Directional Migration, Oblique Rebound, and Reduced Contact Time

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