Experimental study of the soot formation of RP-3 behind reflected shock waves

He, Jiasong; Leiyong, Xian; Li, Ping; Zhang, Changhua; Wang, Jingbo; Li, Xiangyuan

doi:10.1016/j.fuel.2017.03.030

Cited by 19 publications

(10 citation statements)

References 48 publications

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“…Therefore, we modified KM2 soot surface mechanism to include only pyrene, as pyrene is the largest PAH validated using the KM2 mech. A similar approach for soot nucleation and condensation by using pyrene as the largest species was used in He et al (46) and Peña et al (44). The collision factor was modified to 0.5 for pyrene-pyrene interaction and led to better agreement.…”

Section: Resultsmentioning

confidence: 99%

“…Additionally, there already exist well-established chemical kinetic reaction mechanisms for ethylene (22). There have been previous works on investigating soot formation within a shock tube (16,(23)(24)(25)(26)(27)(28). These studies have found some useful trends: a reduction in soot formation for oxygencontaining fuels (oxygenates); lower equivalence ratios (Φ) had a positive effect on soot reduction; and the soot yield (ratio of soot carbon to overall system carbon) is reduced as fuel concentration is reduced.…”

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confidence: 99%

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Measuring the effectiveness of high-performance Co-Optima biofuels on suppressing soot formation at high temperature

Barak

Rahman

Neupane

et al. 2020

Proc. Natl. Acad. Sci. U.S.A.

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Soot emissions in combustion are unwanted consequences of burning hydrocarbon fuels. The presence of soot during and following combustion processes is an indication of incomplete combustion and has several negative consequences including the emission of harmful particulates and increased operational costs. Efforts have been made to reduce soot production in combustion engines through utilizing oxygenated biofuels in lieu of traditional nonoxygenated feedstocks. The ongoing Co-Optimization of Fuels and Engines (Co-Optima) initiative from the US Department of Energy (DOE) is focused on accelerating the introduction of affordable, scalable, and sustainable biofuels and high-efficiency, low-emission vehicle engines. The Co-Optima program has identified a handful of biofuel compounds from a list of thousands of potential candidates. In this study, a shock tube was used to evaluate the performance of soot reduction of five high-performance biofuels downselected by the Co-Optima program. Current experiments were performed at test conditions between 1,700 and 2,100 K and 4 and 4.7 atm using shock tube and ultrafast, time-resolve laser absorption diagnostic techniques. The combination of shock heating and nonintrusive laser detection provides a state-of-the-art test platform for high-temperature soot formation under engine conditions. Soot reduction was found in ethanol, cyclopentanone, and methyl acetate; conversely, an α-diisobutylene and methyl furan produced more soot compared to the baseline over longer test times. For each biofuel, several reaction pathways that lead towards soot production were identified. The data collected in these experiments are valuable information for the future of renewable biofuel development and their applicability in engines.

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Section: Resultsmentioning

confidence: 99%

mentioning

confidence: 99%

Measuring the effectiveness of high-performance Co-Optima biofuels on suppressing soot formation at high temperature

Barak

Rahman

Neupane

et al. 2020

Proc. Natl. Acad. Sci. U.S.A.

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“…The pressure and temperature behind the reflected shock wave were determined through the one-dimensional normal shock relations conducted by the Gaseq program, as well from the measured shock wave velocities, initial temperature and pressure, and the thermodynamic properties for the reaction mixtures. In this experiment, similar to previous studies [14], soot-induction time and soot yield were measured using the laser extinction method. Figure 4 shows the schematic diagram of the apparatus used for measuring soot extinction in the facility.…”

Section: High-pressure Shock Tube (Hpst)mentioning

confidence: 92%

“…In addition to the high-temperature pyrolysis characteristics, many researchers have also conducted experimental studies on the mechanism of formation of soot for aviation fuels. Soot formation from RP-3 jet fuel was studied in a heated surge tube by Jiuning et al [14]. The soot induction delay time and soot yield also were measured by investigating a soot-inducing laser extinction signal at 632.8 nm; pressures of 2 and 5 atm; equivalence ratios of infinity, 10, 20, and 5; and a temperature range of 1670-2200 K. In addition to these, a number of researchers have conducted experimental studies related to combustion chemistry on various types of aviation fuels; these are shown in Table 1.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on the Pyrolysis and Soot Formation Characteristics of JP-10 Jet Fuel

Wu²,

Jia

et al. 2022

Energies

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Experiments of high temperature pyrolysis and soot formation analysis on JP-10, one of the representatives of fuels, were conducted in order to analyze its properties and help construct its chemical kinetic mechanism. High-temperature pyrolysis and fuel-rich oxidation experiments were carried out on JP-10 fuel under different conditions using two types of shock tube equipment (SPST and HPST). The pyrolysis experiments were carried out in two working conditions with JP-10 concentrations of 200 ppm and 500 ppm (in Ar). Quantitative analyses of JP-10 pyrolysis products were carried out using gas chromatography, and a total of eight small molecule products below C4 were detected. Among these eight products, methane, ethene, and acetylene were the three main products. In the fuel-rich oxidation experiments for soot formation analysis, a total of nine working conditions were designed, but soot formation was detected only under three of them. The soot induction delay time and soot yield of JP-10 were investigated using laser absorption measurement. The SYmax (the maximum amount of soot yield) and other relevant parameters were investigated under these three different working conditions. At a pressure of 3 bar and a temperature of 1884.10 K, the soot yield reached a maximum of 14.3. In addition to practical insights from these data, they were also useful for the construction and validation of the chemical kinetic mechanism of JP-10.

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“…They found that increasing temperature, pressure or decresing equivalence ratio can decrease the IDT. He et al [20] investigated the effects of pressure and equivalence ratio on soot information of RP-3 in a heated shock tube. They noted that the soot yield reduces significantly with decreased pressure or equivalence ratio.…”

Section: Introductionmentioning

confidence: 99%

Ignition and combustion characteristics of wall-impinged kerosene (RP-3) fuel spray with varying injection parameters

Zhang

et al. 2020

Therm sci

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The fuel quantity and injection pressure are two essential factors to optimize the injection strategy. In this paper, we focus on the investigation for the ignition and combustion characteristics of wall-impinged kerosene (RP-3) fuel spray at different injection quantities and pressures. Experiments are conducted in a constant volume combustion vessel to simulate the Diesel engine condition, adopting a single-hole nozzle with 0.22 mm. The flame images are captured using a high-speed camera, and then the behaviors of ignition and combustion are processed and analyzed. The main emphasis is placed on the variation laws of the ignition position distance, the ignition delay time, the combustion duration, the flame area, spatially integrated natural luminosity and time integrated natural luminosity.

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Experimental study of the soot formation of RP-3 behind reflected shock waves

Cited by 19 publications

References 48 publications

Measuring the effectiveness of high-performance Co-Optima biofuels on suppressing soot formation at high temperature

Measuring the effectiveness of high-performance Co-Optima biofuels on suppressing soot formation at high temperature

Experimental Study on the Pyrolysis and Soot Formation Characteristics of JP-10 Jet Fuel

Ignition and combustion characteristics of wall-impinged kerosene (RP-3) fuel spray with varying injection parameters

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