Comparative studies on the ignition characteristics of diisobutylene isomers and iso-octane by using a rapid compression machine

Wu, Yingtao; Yang, Meng; Yao, Xiaoxin; Liu, Yang; Tang, Chenglong

doi:10.1016/j.fuel.2020.118008

Cited by 6 publications

(2 citation statements)

References 38 publications

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“…Figure 1 shows a schematic of the experimental setup. Details of the RCM system have been introduced in our previous works [17][18][19]. Briefly, it consists of eight parts, including the high-pressure air tank, the driving chamber, the hydraulic chamber, the compression chamber, the combustion chamber, the control and data acquisition, the mixture preparation assembly, and the optical system.…”

Section: Experimental Facility and Methodsmentioning

confidence: 99%

The Auto‐Ignition Behaviors and Thermal Safety of the Composite Modified Double Base Propellants under Rapid Heating

Yang

Liao

Mai

et al. 2021

Propellants Explo Pyrotec

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The safety issue of energetic materials (EMs) such as propellants or explosives has been a high concern. When EMs are subjected to rapid thermal stimulus, they will ignite or explode, which may cause personal injury and property loss. Studies on auto-ignition behaviors and thermal safety of EMs under rapid thermal stimulation provide important guidelines for EMs in their production, transportation, storage, and application. In this work, auto-ignition experiments of the composite modified double base (CMDB) propellants, which include 1,1-diamino-2,2-dinitroethylene (FOX-7) and hexahydro-1,3,5-trinitro-1,3,5-triazine (RDX) mixtures under high initial temperature condition, have been conducted by using a rapid compression machine (RCM). The temperature rise rate can reach up to 2 × 10 4 K/s. Pressure evolution recording and high speed-visualization were synchronized to reveal the auto-ignition behaviors of CMDB samples. Results show that the end of compression (EOC) temperature and pressure have a significant impact on the ignition delay time (IDT). The IDT increases with a decrease in temperature and pressure. In addition, through tuning the EOC temperature and pressure, the critical condition that separates the ignition region and non-ignition region is obtained. The critical ignition temperature of CMDB decreases with an increase in pressure. When the pressure is higher than 2.0 MPa, the critical temperature is about 650 K.

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Section: Experimental Facility and Methodsmentioning

confidence: 99%

The Auto‐Ignition Behaviors and Thermal Safety of the Composite Modified Double Base Propellants under Rapid Heating

Yang

Liao

Mai

et al. 2021

Propellants Explo Pyrotec

Self Cite

View full text Add to dashboard Cite

show abstract

“…Besides the flame reactors, a number of studies have been performed on the lowtemperature oxidation behavior of several other alkanes (including but not limited to n-butane, n-hexane and iso-octane) based on rapid compression machines [15,[33][34][35], shock tubes [36,37] or flow reactors [38,39]. In those studies, the experimental and kinetic study of the ignition behavior and chemical speciation during the low-temperature oxidation process were performed and has provided the foundation for developing low-temperature combustion kinetic models for target fuels.…”

Section: Introductionmentioning

confidence: 99%

Effects of Carbon Chain Length on N-Alkane Counterflow Cool Flames: A Kinetic Analysis

Tian

Liu

2022

Fire

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An in-depth understanding of the low-temperature reactivity of hydrocarbon fuels is of practical relevance to developing advanced low-temperature combustion techniques. The present study aims to study the low-temperature chemistry of several large n-alkanes with different carbon chain lengths in counterflow cool diffusion flames by kinetic analysis. The large n-alkanes that were chosen are n-heptane (NC7H16), n-decane (NC10H22) and n-dodecane (NC12H26), which are important components of practical fuels. Firstly, the thermochemical structure of a typical cool diffusion flame is understood through its comparison with that of a hot diffusion flame. The boundary conditions, including the ozone concentration, fuel concentration and flow velocity—where cool flames can be established—are identified with a detailed chemical mechanism that evaluates the low-temperature reactivity of the investigated n-alkanes. The results show that the n-alkane with a longer carbon chain length is more reactive than the smaller one, thereby indicating the order of NC12H26 > NC10H22 > NC7H16. This trend is qualitatively similar to the findings from non-flame reactors. The reaction pathway and sensitivity analysis are performed to understand the effects of carbon chain length on the low-temperature reactivity. The contribution of an n-alkane with a longer carbon chain to the dehydrogenation reaction, oxidation reaction and isomerization reaction is greater than that of a smaller n-alkane, and abundant O and OH radicals are generated to promote the fuel low-temperature oxidation process, thereby resulting in an enhanced low-temperature reactivity. The effects of ozone addition on the low-temperature reactivity of n-alkanes are also highlighted. It is found that the addition of ozone could provide a large number of active O radicals, which dehydrogenate with the fuels to generate OH radicals and then promote fuel low-temperature oxidation. The present results are expected to enrich the understanding of the low-temperature characteristics of large n-alkanes.

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Low-temperature oxidation chemistry of 2,4,4-trimethyl-1-pentene (diisobutylene) triggered by dimethyl ether (DME): A jet-stirred reactor oxidation and kinetic modeling investigation

Zhang

Cao

Zou

et al. 2021

Combustion and Flame

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Comparative studies on the ignition characteristics of diisobutylene isomers and iso-octane by using a rapid compression machine

Cited by 6 publications

References 38 publications

The Auto‐Ignition Behaviors and Thermal Safety of the Composite Modified Double Base Propellants under Rapid Heating

The Auto‐Ignition Behaviors and Thermal Safety of the Composite Modified Double Base Propellants under Rapid Heating

Effects of Carbon Chain Length on N-Alkane Counterflow Cool Flames: A Kinetic Analysis

Low-temperature oxidation chemistry of 2,4,4-trimethyl-1-pentene (diisobutylene) triggered by dimethyl ether (DME): A jet-stirred reactor oxidation and kinetic modeling investigation

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