Vapor pressure and sensitization effects in detonation of a decane spray

Lin, Z.; Nicholls, James A.; Tang, M.J.; Kauffman, C. W.; Sichel, Martin

doi:10.1016/s0082-0784(85)80667-6

Cited by 8 publications

(2 citation statements)

References 7 publications

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“…Studies on spray detonation presented that PDE efficiency (check again!) is highly related to the droplet size and vaporization of liquid fuel [8,9]; thus, atomization and vaporization of liquid fuel should be considered for liquidfueled PDE.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on Pulse Detonation Engine with Two-Phase Inhomogeneous Mixture

Gong

2020

International Journal of Aerospace Engineering

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In order to investigate the effects of fuel distribution on the operation of two-phase pulse detonation engine (PDE), a series of cold flow and multicycle PDE experiments was carried out with 9 mixing schemes. Homogeneity degree with fuel distribution considered in terms of space and time was proposed to quantitatively evaluate the mixing of liquid fuel and air by particle image velocimetry (PIV) in cold flow experiments. Operation stability of multicycle PDE was presented by statistical analysis of peak pressure at the outlet of a detonation tube. The relationship between operation stability and homogeneity degree was quantitatively elaborated. These experimental results indicated that not only using mixing reinforcement devices (such as pore plate and reed valve) was fuel distribution improved but also the effect of inlet ways on the homogeneity degree was weakened. The homogeneity degree of fuel distribution ζ=0.72 was a critical value for stable working of multicycle PDE. When homogeneity degree was lower than 0.72, stable state was not maintained and detonation wave in some cycles was not established due to poor fuel distribution. Therefore, it is necessary to hold homogeneity degree larger than 0.72 to achieve stable operation of PDE. These results contribute to enhancing the operation stability and offering guidelines for the design of PDE’s mixing scheme.

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Section: Introductionmentioning

confidence: 99%

Experimental Study on Pulse Detonation Engine with Two-Phase Inhomogeneous Mixture

Gong

2020

International Journal of Aerospace Engineering

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“…To promote the ignition of a spray detonation wave with large fuel droplets or low vapour pressures, additives such as nitrates have been used to sensitize hydrocarbon liquid fuels (Lu and Slagg 1972, 1974, 1977Lin et al 1984;Dabora 1980;Borisov et al 1983aBorisov et al , 1983b. The literature on the detonability of some hydrocarbon fuels sensitized by n-propyl nitrate, CH 3 (CH 2 ) 2 NO 3 , is summarized in Table 1.…”

Section: Introductionmentioning

confidence: 99%

Effects of nitrates on hydrocarbon-air flames and detonations

Zhang¹,

Akbar

Thibault

et al. 2001

Shock Waves

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The subject of hydrocarbon sensitization by nitrates under conditions of a heterogeneous spray has been of interest due to its applicability in promoting ignition. To gain insight into the mechanisms of the nitrate sensitization effect, the present work was limited to vapour phase studies at elevated temperatures in order to avoid the influence of heterogeneous factors. The experiments performed included studies of flammability, flame propagation, shock ignition and detonation. The mixtures used were composed of air, hexane, and isopropyl nitrate (IPN) with IPN concentrations ranging from 0 to 100 mole % in hydrocarbon-IPN. In addition, methane and propane were also included in the flame experiments. For the shock ignition and detonation experiments, the measured ignition delay and detonation cell size had minimum values for IPN-air and maximum values for hexane-air. With increases in the IPN concentration, the ignition delay and detonation cell size fell monotonically between the values for hexane and IPN. This monotonic behaviour was explained to be the result of mixing the hydrocarbon with the more sensitive nitrate whose energetics are larger than or comparable to the hydrocarbon when mixed with air. For the slow combustion mode, the results also confirmed the monotonic behavior and showed that the lean flammability limit and the flame velocity fell between those of the hydrocarbon and IPN.

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The effect of additives on the detonation hazard of some hydrocarbon‐air mixtures

Yang

Xiao-dong

Wang

et al. 2001

Process Safety Progress

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Hazards caused by detonation of hydrocarbon‐air mixtures are a continuing problem. Of the factors affecting detonation hazards of hydrocarbon‐air mixtures, additives play an important role. In this paper, a series of experiments are described addressing the influence of chemical additives on the detonation of some hydrocarbon‐air mixtures under confined (rectangle shock tube tests) conditions. The experimental results show that NT (nitric ether or RONO2), PO (1,2‐epoxypropane), and BPO (benzoyl peroxide) have a clear sensitizing effect on the detonation hazards of these mixtures. The mechanistic influence of additives is simply described, according to the chain reaction theory of detonation.

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Vapor pressure and sensitization effects in detonation of a decane spray

Cited by 8 publications

References 7 publications

Experimental Study on Pulse Detonation Engine with Two-Phase Inhomogeneous Mixture

Experimental Study on Pulse Detonation Engine with Two-Phase Inhomogeneous Mixture

Effects of nitrates on hydrocarbon-air flames and detonations

The effect of additives on the detonation hazard of some hydrocarbon‐air mixtures

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