Experimental investigation of silane combustion and particle nucleation using a rapid-compression facility

Donovan, M.T.; He, Xin; Zigler, Bradley T.; Palmer, Timothy R.; Walton, S.M.; Wooldridge, Margaret S.

doi:10.1016/j.combustflame.2005.01.011

Cited by 14 publications

(8 citation statements)

References 13 publications

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“…The end-wall of the test section is sealed using either a polycarbonate sheet that allows optical access for high-speed imaging or a stainless steel plate instrumented with the fast-gas sampling system, described below. A further detailed description of the UM RCF components, dimensions, procedures, and characterization is provided by Donovan et al 36,37 Piezoelectric transducers (Kistler 6045A and B, and Kistler 6125A and C) coupled with a charge amplifier (Kistler 5010B) were used to measure the pressure histories for the experiments, and the data were collected using a 32-bit data acquisition system (National Instruments cDAQ-9172) and a user data-acquisition program developed in LabView. Chemiluminescence emitted during ignition was recorded using a high-speed color camera (Vision Research Phantom v7.1) and a Navistar 50 mm lens (f/0.95).…”

Section: ■ Experimental Methodsmentioning

confidence: 99%

Combustion Chemistry of Ethanol: Ignition and Speciation Studies in a Rapid Compression Facility

2016

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Ethanol remains the most important alternative fuel for the transportation sector. This work presents new experimental data on ethanol ignition, including stable species measurements, obtained with the University of Michigan rapid compression facility. Ignition delay times were determined from pressure histories of ignition experiments with stoichiometric ethanol-air mixtures at pressures of ∼3-10 atm. Temperatures (880-1150 K) were controlled by varying buffer gas composition (Ar, N2, CO2). High-speed imaging was used to record chemiluminescence during the experiments, which showed homogeneous ignition events. The results for ignition delay time agreed well with trends on the basis of previous experimental measurements. Speciation experiments were performed using fast gas sampling and gas chromatography to identify and quantify ethanol and 11 stable intermediate species formed during the ignition delay period. Simulations were carried out using a chemical kinetic mechanism available in the literature, and the agreement with the experimental results for ignition delay time and the intermediate species measured was excellent for the majority of the conditions studied. From the simulation results, ethanol + HO2 was identified as an important reaction at the experimental conditions for both the ignition delay time and intermediate species measurements. Further studies to improve the accuracy of the rate coefficient for ethanol + HO2 would improve the predictive understanding of intermediate and low-temperature ethanol combustion.

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Section: ■ Experimental Methodsmentioning

confidence: 99%

Combustion Chemistry of Ethanol: Ignition and Speciation Studies in a Rapid Compression Facility

2016

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“…12 Even though the absence of hydrogen makes these mixtures of less interest to the scope of this paper, it is important to underline that all the tested detailed models fail to reproduce the silane/oxygen/nitrogen shock tube data by Petersen 10 and have unsatisfactory quantitative accuracy in the rapid compression machine experiments. 11 Such inaccuracies are an evident proof that the current knowledge of silane reaction modeling is still very limited. The atmospheric spontaneous ignition data by Kondo et al 12 is commonly cited because it provides an estimate of the critical ratio of silane/oxygen at atmospheric conditions that is necessary to start an explosive reaction sequence.…”

Section: A Experimental Data For Chemical Kinetic Modelingmentioning

confidence: 99%

Reduced Silane Chemical Mechanisms for Hypersonic Combustion

Rahimi

Esposito

Chelliah

2013

51st AIAA Aerospace Sciences Meeting Including the New Horizons Forum and Aerospace Exposition

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This paper presents an assessment of the existing detailed chemical kinetic models for silane combustions under conditions that are of interest in hypersonic combustion applications. In particular, the sources of inconsistencies between modeling and experiments are explored at temperature and pressure conditions that characterize the ignition phenomena in practical combustors. Given the high number of species modeled in the analyzed detailed chemical mechanisms, several skeletal reduced models were obtained by employing a procedure based on the Principal Component Analysis of Sensitivity matrices (PCAS). Depending on the starting detailed mechanism, reduced models of 15 or 19 species retain a satisfactory accuracy and can be implemented in CFD simulations. Additionally, the skeletal reduction procedure provides some insight into the key reactive species and their role in the kinetic modeling.

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“…Other laser diagnostics used in RCM studies include measurements of soot volume concentration [85] and hydroxyl radical concentration [86,87]. In [85], the soot evolution was studied by the line-of-sight extinction method, which measured the soot concentration in the initial stage of soot growth before the optical path became opaque.…”

Section: Diagnostics In Rcm Experimentsmentioning

confidence: 99%

“…In [85], the soot evolution was studied by the line-of-sight extinction method, which measured the soot concentration in the initial stage of soot growth before the optical path became opaque. Using OH laser absorption, the ignition and combustion kinetics of silane were investigated [86]. Furthermore, He et al [87] measured OH concentrations using narrow line absorption centered at 3206.556 cm -1 during isooctane autoignition.…”

Section: Diagnostics In Rcm Experimentsmentioning

confidence: 99%

Using rapid compression machines for chemical kinetics studies

Sung¹,

Curran²

2014

Progress in Energy and Combustion Science

246

127

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Rapid compression machines (RCMs) are used to simulate a single compression stroke of an internal combustion engine without some of the complicated swirl bowl geometry, cycle-to-cycle variation, residual gas, and other complications associated with engine operating conditions. RCMs are primarily used to measure ignition delay times as a function of temperature, pressure, and fuel/oxygen/diluent ratio; further they can be equipped with diagnostics to determine the temperature and flow fields inside the reaction chamber and to measure the concentrations of reactant, intermediate, and product species produced during combustion. This paper first discusses the operational principles and design features of RCMs, including the use of creviced pistons, which is an important feature in order to suppress the boundary layer, preventing it from becoming entrained into the reaction chamber via a roll-up vortex. The paper then discusses methods by which experiments performed in RCMs are interpreted and simulated. Furthermore, differences in measured ignition delays from RCMs and shock tube facilities are discussed, with the apparent initial gross disagreement being explained by facility effects in both types of experiments. Finally, future directions for using RCMs in chemical kinetics studies are also discussed.

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Experimental investigation of silane combustion and particle nucleation using a rapid-compression facility

Cited by 14 publications

References 13 publications

Combustion Chemistry of Ethanol: Ignition and Speciation Studies in a Rapid Compression Facility

Combustion Chemistry of Ethanol: Ignition and Speciation Studies in a Rapid Compression Facility

Reduced Silane Chemical Mechanisms for Hypersonic Combustion

Using rapid compression machines for chemical kinetics studies

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