Demonstration of a free-piston rapid compression facility for the study of high temperature combustion phenomena

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

doi:10.1016/j.combustflame.2004.02.006

Cited by 75 publications

(60 citation statements)

References 26 publications

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“…This device is well suited to the study of combustion processes under similar conditions to those experienced in an IC engine, enabling the measurements of fuel ignition delays and the validation of kinetics mechanisms [1], [2] . It is thus essential to characterize the RCM temperature fields, using a non-intrusive optical technique such as PLIF.…”

Section: Introductionmentioning

confidence: 99%

Temperature measurements in a rapid compression machine using anisole planar laser-induced fluorescence

Tran¹,

Guibert

Morin

et al. 2015

Combustion and Flame

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, et al.. Temperature measurements in a rapid compression machine using anisole planar laser-induced fluorescence. Combustion and Flame, Elsevier, 2015, 162, pp.3960 -3970. <10.1016/j.combustflame.2015 AbstractAdvanced combustion processes induced by self-ignition mechanisms in piston engines, such as Homogeneous Charge Compression Ignition (HCCI), especially need an accurate spatio-temporal temperature information because their phenomenology therefore their performances highly depend on the thermal conditions. The objective of this study is to measure the temperature distribution inside a rapid compression machine (RCM) using anisole planar laser induced fluroescence. The present paper gives a new insight into the interpretation of RCM autoignition data. It also brings useful information for kinetics-related combustion research and combustion modeling. The anisole planar laser-induced fluorescence (PLIF) technique is applied, in order to observe the formation and the evolution of temperature heterogeneities in the combustion chamber prior to the autoignition process. Anisole is used as a novel tracer species, and the fluorescence signal's dependence on parameters, such as temperature, pressure and bath gas composition, is quantified in a high-pressure, high-temperature facility. Calibration of the fluorescence signal is defined under RCM-related temperature and pressure conditions and a protocol is proposed for postprocessing of the PLIF image sequences, allowing the quantitative field temperatures to be determined at successive instants following compression. In order to gain a better understanding of the mixture process, Particle Image Velocimetry (PIV) measurements are analysed under the same conditions. The correlation between thermal and aerodynamic phenomena is determined. The temperature field is found to be non-uniform, with hot and cold centre positions resulting from recirculation inside the chamber, combined with heat transfer effects from the chamber wall.

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Section: Introductionmentioning

confidence: 99%

Temperature measurements in a rapid compression machine using anisole planar laser-induced fluorescence

Tran¹,

Guibert

Morin

et al. 2015

Combustion and Flame

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“…Since the piston decelerates at a constant rate, the impact velocity at the end of compression is not large. Alternative stopping mechanism designs also included using the shape of a cam to stop the piston [19] and the interference fit of a polymeric piston in the bore of the reaction chamber in a free-piston rapid compression facility [17].…”

Section: Introductionmentioning

confidence: 99%

“…29]. A unique sabot design to achieve the same purpose has also been demonstrated [17]. These features have made possible more accurate characterization of mixture temperature for kinetic studies.…”

mentioning

confidence: 99%

“…This in turn can affect the fidelity of zero-dimensional modeling for adequate interpretation of experimental data, and can significantly influence quantitative species sampling [36,37] because of the relatively large crevice volume. These undesirable effects are due to mass transfer between the crevice and the reaction chamber, which can potentially be overcome with crevice containment [17,[36][37][38][39]. The principle of crevice containment is to separate the crevice from the main reaction zone by a seal that is engaged only when the piston reaches the end of compression.…”

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confidence: 99%

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Using rapid compression machines for chemical kinetics studies

Sung¹,

Curran²

2014

Progress in Energy and Combustion Science

260

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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“…RCMs [2][3][4][5][6][7][8][9][10][11][12][13][14] and rapid compression and expansion machines (RCEMs) [15][16][17][18][19] can be classified on the basis of whether they can perform an expansion stroke. The distinguishing characteristic of RCM from RCEM is that when the piston of the RCM moves to the top dead center (TDC), the piston gets locked (including driving gas pressure locking or mechanical locking) without an expansion process, such that a constant volume combustion chamber is formed.…”

Section: Introductionmentioning

confidence: 99%

Performance Characterization and Auto-Ignition Performance of a Rapid Compression Machine

et al. 2014

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Abstract:A rapid compression machine (RCM) test bench is developed in this study. The performance characterization and auto-ignition performance tests are conducted at an initial temperature of 293 K, a compression ratio of 9.5 to 16.5, a compressed temperature of 650 K to 850 K, a driving gas pressure range of 0.25 MPa to 0.7 MPa, an initial pressure of 0.04 MPa to 0.09 MPa, and a nitrogen dilution ratio of 35% to 65%. A new type of hydraulic piston is used to address the problem in which the hydraulic buffer adversely affects the rapid compression process. Auto-ignition performance tests of the RCM are then performed using a DME-O2-N2 mixture. The two-stage ignition delay and negative temperature coefficient (NTC) behavior of the mixture are observed. The effects of driving gas pressure, compression ratio, initial pressure, and nitrogen dilution ratio on the two-stage ignition delay are investigated. Results show that both the first-stage and overall ignition delays tend to increase with increasing driving gas pressure. The driving gas pressure within a certain range does not significantly influence the compressed pressure. With increasing compression ratio, the first-stage ignition delay is shortened, whereas the second-stage ignition delay is extended. With increasing initial pressure, both the first-stage and second-stage ignition delays are shortened. The second-stage ignition delay is shortened to a greater extent than that of the first-stage. With increasing nitrogen dilution ratio, the first-stage ignition delay is shortened, whereas the second-stage is extended. Thus, overall ignition delay presents different trends under various compression ratios and compressed pressure conditions. OPEN ACCESSEnergies 2014, 7 6084

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Demonstration of a free-piston rapid compression facility for the study of high temperature combustion phenomena

Cited by 75 publications

References 26 publications

Temperature measurements in a rapid compression machine using anisole planar laser-induced fluorescence

Temperature measurements in a rapid compression machine using anisole planar laser-induced fluorescence

Using rapid compression machines for chemical kinetics studies

Performance Characterization and Auto-Ignition Performance of a Rapid Compression Machine

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