Auto-ignition behaviors of nitromethane in diluted oxygen in a rapid compression machine: Critical conditions for ignition, ignition delay times measurements, and kinetic modeling interpretation

Yang, Meng; Wu, Yingtao; Tang, Chenglong; Liu, Yang; Huang, Zuohua

doi:10.1016/j.jhazmat.2019.05.036

Cited by 11 publications

(4 citation statements)

References 34 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

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“…In this study, an optical RCM was utilized to study the fuel spray at CI engine-relevant conditions. This RCM has an engine-like piston movement and allows for the simulation of a single compression stroke at variable compression ratios (CRs), and it was previously used to study the auto-ignition characteristics of the homogeneous gas phase mixtures such as methylcyclohexane [27], 1,3,5-trimethylbenzen [28], and nitromethane [29]. However, in the actual CI engine, the fuel is directly injected into the combustion chamber in the liquid phase and then atomized, evaporated, mixed with air, and combusted.…”

Section: Experimental Apparatus and Limitationsmentioning

confidence: 99%

“…The macroscopic photos of spray were obtained by the Schlieren method with a Phantom V611 high-speed camera (HSC), convex lens (Zolix), and spot light (Zolix). More detailed descriptions and its operation principle are available in our previous studies [27][28][29][30]. In this study, the combustion chamber length was fixed at 30 mm, and the sample rate of the HSC was set at 25,000 fps.…”

Section: Experimental Apparatus and Limitationsmentioning

confidence: 99%

Experimental Investigation on Auto-Ignition Characteristics of Kerosene Spray Flames

et al. 2022

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To facilitate the better use of RP-3 kerosene in compression ignition engines, the auto-ignition behaviors of RP-3 kerosene spray were experimentally investigated in an optical rapid compression machine. Results show that most of the tests have good ignitability and combustion performance. For all the successful ignited cases, the flame kernel was found to be formed before the steep rise of pressure, which explained that image-based ignition delay time is always shorter than the pressure-based ignition delay time. The effects of ambient environment, injection pressure, and injection delay time on the pressure history, ignition intensity, combustion duration, heat release rate, and other parameters were investigated individually. The ambient environment has a strong influence on ignition delay time by accelerating the chemical reactions, whereas the high injection pressure helps the better vaporization of fuel spray. The effect of injection delay time is non-monotonic as the trade-off relation between heat loss and blending of fuel and oxygen. The heat release rate histories under different conditions were compared and analyzed, and the two-stage heat release phenomenon was observed in the negative temperature coefficient region. The ignition intensity region was determined based on the measured ignition delay times of RP-3 kerosene spray, and multiple linear regression correlation was used to study the ignition delay time sensitivity to multi-factors.

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“…Analisa penyemprotan dapat dilakukan dengan rapid compression machine (RCM) dengan menggunakan dasar RCM sebagai menyerupai kinerja piston di mesin. RCM biasa digunakan pada analisa karakteristik penyalaan otomatis dari campuran fase gas homogen, seperti nitromethane [21] dan methyl cyclohexane [22]. Pada analisa penyemprotan minyak tanah dengan menggunakan skema RCM di Gambar 5.…”

Section: Analisa Karakeristik Propagasi Api Dan Penyemprotanunclassified

Pengaruh Pencampuran Minyak Tanah Dengan Bahan Bakar Minyak Diesel, Biodiesel Dan Lainnya - Review

Bhikuning

Hafnan²,

Wijaya³

2022

JRM

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The use of diesel oil has been proven to increase exhaust emissions which will have an impact on the environment. Mixing diesel oil with other fuels can reduce exhaust emissions and increase combustion efficiency. This article discusses the review of mixing kerosene with diesel oil and biodiesel. The method was the fuel are running in the diesel engine and calculated the performance and emissions in the engine. The fuel properties of mixing kerosene with diesel oil and biodiesel can reduce the level of viscosity and specific gravity of the fuel and increase the calorific value which will have an impact on improving the atomization in combustion. In addition, mixing diesel oil and kerosene can reduce emissions such as CO2, CO, HC, particulate, and opacity. However, mixing kerosene with biodiesel can increase NOx emissions. In addition, the addition of kerosene in diesel oil can lead to low fuel consumption in diesel oil. The addition of kerosene with biodiesel will increase thermal efficiency. Therefore, it can be concluded that the addition of kerosene into diesel oil and biodiesel can improve engine performance in the engine and reduce some exhaust emissions.

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Auto-ignition behaviors of nitromethane in diluted oxygen in a rapid compression machine: Critical conditions for ignition, ignition delay times measurements, and kinetic modeling interpretation

Cited by 11 publications

References 34 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

Experimental Investigation on Auto-Ignition Characteristics of Kerosene Spray Flames

Pengaruh Pencampuran Minyak Tanah Dengan Bahan Bakar Minyak Diesel, Biodiesel Dan Lainnya - Review

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