An experimental investigation of blow-out limits for hydrogen–diluent diffusion flames

Shebeko, Yu. N.; Korol'chenko, A. Ya.; Zamishevski, E.D.; Trunev, A. V.; Navzenya, V. Y.; Zaitzev, A. A.

doi:10.1016/s0010-2180(98)00107-2

Cited by 6 publications

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“…Also plotted in Figure 7 are other detachment velocity results of turbulent, nitrogen-diluted hydrogen jet flames found in the literature (Chao et al, 2004;Shebeko et al, 1999;Takahashi et al, 1984). The results of Chao et al (2004) yield higher U d than the other studies, and while the tip condition of the jet in their work is unspecified, such a result could occur for a fuel tube with an appreciable lip thickness (Takahashi & Schmoll, 1990;Vranos et al, 1968).…”

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confidence: 80%

“…In some cases, overlap of the hysteresis regimes occurs such that an attached, LLB, or LTB flame can exist for a given set of geometric and flow conditions, depending on the flame's ignition point or previous flow conditions, as shown in Figure 1. Finally, increasing the jet velocity or diluent 758 N. T. WEILAND AND P. A. STRAKEY concentration of an LTB flame leads to turbulent blowout, which has been the subject of many experimental (Chao et al, 2004;Cheng & Chiou, 1998;Dahm & Mayman, 1990;Kalghatgi, 1981;Shebeko et al, 1999;Vanquickenborne & van Tiggelen, 1966;Vranos et al, 1968) and analytical (Broadwell et al, 1984;Pitts, 1988Pitts, , 1989Tieszen et al, 1996) studies. The specific stability mechanisms that allow lifted flames to exist is a topic of considerable research, and various theories are covered in several reviews on the topic (Lyons, 2007;Peters, 2000;Pitts, 1988).…”

Section: Introductionmentioning

confidence: 99%

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Stability Characteristics of Turbulent Hydrogen Dilute Diffusion Flames

Weiland

Strakey

2009

Combustion Science and Technology

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Diffusion flame combustion of high-hydrogen fuels in land-based gas turbine combustors may include dilution of the fuel with inert gases and high velocity fuel injection to reduce NO x emissions. Stability regimes of such combustors are investigated in this study by examining turbulent dilute diffusion flames of hydrogen/nitrogen mixtures, issuing into a quiescent environment from a thin-lipped tube. This study has revealed two distinctly different types of lifted flames: lifted, laminar-base flames, for which liftoff heights vary from 1 to 3 jet diameters above the jet exit and are controlled by differential diffusion, and lifted, turbulentbase flames that stabilize much further downstream and are dominated by turbulent processes. In addition, stability limits governing the detachment or reattachment of the flame to the lip of the burner are examined, as well as the limits governing transitions between the two types of lifted flames and transition from these lifted flames to blowout.

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confidence: 80%

Section: Introductionmentioning

confidence: 99%

Stability Characteristics of Turbulent Hydrogen Dilute Diffusion Flames

Weiland

Strakey

2009

Combustion Science and Technology

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“…One of the major components of any IPE is a shock absorber designed to absorb the kinetic energy generated when a person falls from height and to make the stop after falling softer [12][13][14]. Methodologies that regulate tests of such IPE are set forth in GOST R ЕН 355.…”

Section: Introductionmentioning

confidence: 99%

Problems of the dynamic test method for individual protection equipment (shock absorbers)

2018

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Abstract. This paper examines issues of safety of high-altitude works, using individual protection equipment to prevent falling from a height. In particular, the paper reviews personal protective equipment -shock absorber, its dynamic characteristics and related test methods to meet the requirements of Technical Regulations 019/2011 "Safety of Individual Protection Equipment". The paper discusses the differences between the Russian and European standards for dynamic characteristic testing of shock absorbers, even as the former are harmonized texts of the latter, and the effect of such differences on protective performance of shock absorbers and ultimately on safety of works on heights. It have been shown that tests, conducted in accordance with the Russian regulative documents for dynamic performance of the shock absorbers, entail decreasing in safety usage of such type of IPE and increasing in injuries during falls from a height. It has been defined necessity to actualize the range of the testing system of shock absorbers, and to admit its larger value that will cause increase in protective properties of shock absorbers.

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“…You can mark only 2 work, this dissertation (PhD) [4][5][6][7], which dealt with mathematical models and experimental results of the development process of gas explosion at operation VP. Unfortunately, the first job you can note the lack of skilled works on VP, close in size to the actual, and in the second-it can be seen that the results of an experiment on SP real size seem unconvincing.…”

Section: Introductionmentioning

confidence: 99%

The results of the first periodical testing vent-panels (VP)

Polandov

Kukin

2017

MATEC Web Conf.

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Abstract. The article is devoted to analysis of obtained during testing of sandwich panels and insulating glass as VP results. Here are the details on the first periodic test VP method GOST R 56289-2014 «Design translucent legkousvaivaemyh for buildings» using measuring instruments and testing equipment according to this standard, and, accordingly, the results of tests with additional observations obtained during the research.

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An experimental investigation of blow-out limits for hydrogen–diluent diffusion flames

Cited by 6 publications

References 0 publications

Stability Characteristics of Turbulent Hydrogen Dilute Diffusion Flames

Stability Characteristics of Turbulent Hydrogen Dilute Diffusion Flames

Problems of the dynamic test method for individual protection equipment (shock absorbers)

The results of the first periodical testing vent-panels (VP)

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