Journal ArticleDOI
Measurements of concentration decays in underexpanded jets through rectangular slot nozzles
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In this article, the authors measured the concentration decay along the jet centerline for underexpanded jets from rectangular slot nozzles with aspect ratios (AR) of 1-12.6 for storage pressures up to 3.7 MPa.About:
This article is published in International Journal of Hydrogen Energy.The article was published on 2018-05-17. It has received 21 citations till now. The article focuses on the topics: Jet (fluid).read more
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The flow field behaviours of under-expansion jet flame in premixed hydrogen/air explosion venting
Zhuanghong Zhou,Wen Zhou,Siyu Xu,Qiuping Xiao,Weiguo Cao,Fengyuan Jiao,Yun Fei Zhang,Shuo Yu,Sen Xu +8 more
TL;DR: In this paper , the formation of the underexpansion jet flame (UEJF) of premixed hydrogen/air in explosion venting was simulated by ANSYS Fluent, and the wave system structures of the UEJF were systematically analyzed.
Journal ArticleDOI
Modeling of underexpanded hydrogen jets through square and rectangular slot nozzles
Xuefang Li,Qi Chen,Mingjia Chen,Qian He,David M. Christopher,Xu Cheng,Bikram Roy Chowdhury,Ethan S. Hecht +7 more
TL;DR: In this paper, underexpanded hydrogen jets from square and rectangular nozzles with aspect ratios of 1-16 were numerically modeled for stagnation pressures up to 20 MPa and the near and far flow fields were modeled separately using two sequential computational domains to accurately and efficiently capture the flow characteristics.
Journal ArticleDOI
CFD modelling of underexpanded hydrogen jets exiting rectangular shaped openings
TL;DR: In this article, a comparative study is performed to evaluate the effect of nozzle shape on jet structure and dispersion characteristics for underexpanded hydrogen jet releases, including resolution of the near-field behavior.
Journal ArticleDOI
Dispersion of cryogenic hydrogen through high-aspect ratio nozzles
TL;DR: In this paper, the authors measured the dispersion characteristics of planar liquid hydrogen jets at 3 and 5 barabs stagnation pressures and found that they are more characteristic of unintended leaks, which would be expected to be cracks, rather than conventional round nozzles.
Journal ArticleDOI
Effect of wind condition on unintended hydrogen release in a hydrogen refueling station
TL;DR: In this paper, the authors investigated the hydrogen diffusion in different wind condition which including the constant wind velocity and the variable wind velocity is investigated numerically, and the UDF (user defined function) is compiled.
References
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Hydrogen as an energy carrier: Prospects and challenges
Kaveh Mazloomi,Chandima Gomes +1 more
TL;DR: In this article, the feasibility of adopting hydrogen as a key energy carrier and fuel source in the near future has been discussed and it is shown that hydrogen has several advantages, as well as few drawbacks in using for the above purposes.
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The hydrogen issue
Nicola Armaroli,Vincenzo Balzani +1 more
TL;DR: There is little doubt that power production by renewable energies, energy storage by hydrogen, and electric power transportation and distribution by smart electric grids will play an essential role in phasing out fossil fuels.
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On the mixing of a rectangular jet
TL;DR: In this article, a blowdown-type air supply system was used to provide the airflow to a cylindrical settling chamber 1.75 m in length and 0.6 m in diameter.
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Study of the highly underexpanded sonic jet.
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Hydrogen safety: The road toward green technology
TL;DR: In this article, the safety of hydrogen during production, transmission and use is reviewed in relation to its ignition and combustion characteristics namely: wide flammability range detonation level, low ignition energy, relatively high flame velocity, rapid diffusion and buoyancy, in addition to it its characteristics in the liquid phase.