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Single-step chemistry model and transport coefficient model for hydrogen combustion

Science China(Technological Sciences) 2012年第8期55卷 2163-2168页

作者： WEN Jennifer WANG ChangJian LU ShouXiang GUO Jin Center for Fire and Explosion Studies Kingston UniversityLondon SW15 3DWUK State Key Laboratory of Fire Science University of Science and Technology of China Hefei 230027 China

To satisfy the needs of large-scale hydrogen combustion and explosion simulation,a method is presented to establish single-step chemistry model and transport model for fuel-air *** the reaction formula for hydrogen-air mixture is H2+0.5O2→H2O,the reaction rate model is ?? =1.13×10?5[H2][O2]exp(?46.37T0/T) mol(cm3 s)?1,and the transport coefficient model is ?=K/CP=ρD=7.0×10?5T 0.7 g(cm s)?*** using current models and the reference model to simulate steady Zeldovich-von Neumann-Doering(ZND) wave and free-propagating laminar flame,it is found that the results are well ***,deflagration-to-detonation transition in an obstructed channel was also *** numerical results are also well consistent with the experimental *** provide a reasonable proof for current method and new models.

关键词： hydrogen combustion singe-step chemistry model transport coefficient model

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3D Computation of hydrogen-Fueled combustion around Turbine Blade-Effect of Arrangement of Injector Holes

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Journal of Thermal Science 2006年第3期15卷 233-239页

作者： Makoto YAMAMOTO Junichi IKEDA Kazuaki INABA Department of Mechanical Engineering Tokyo University of Science 1-3 KagurazakaShinjuku-kuTokyo162-8601Japan Graduate School of Mechanical Engineering Tokyo University of Science 1-3 KagurazakaShinjuku-kuTokyo162-8601Japan

Recently, a number of environmental problems caused from fossil fuel combustion have been focused on. In addition, with the eventual depletion of fossil energy resources, hydrogen gas is expected to be an alternative energy resource in the near future. It is characterized by high energy per unit weight, high reaction rate, wide range of flammability and the low emission property. On the other hand, many researches have been underway in several countries to improve a propulsion system for an advanced aircraft. The system is required to have higher power, lighter weight and lower emissions than existing ones. In such a future propulsion system, hydrogen gas would be one of the promising fuels for realizing the requirements. Considering these backgrounds, our group has proposed a new cycle concept for hydrogen-fueled aircraft propulsion system. In the present study, we perform 3 dimensional computations of turbulent flow fields with hydrogen-fueled combustion around a turbine blade. The main objective is to clarify the influence of arrangement of hydrogen injector holes. Changing the chordwise and spanwise spacings of the holes, the 3 dimensional nature of the flow and thermal fields is numerically studied.

关键词： computational fluid dynamics turbine blade hydrogen combustion injector hole arrangement

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Numerical Simulation of Tip Leakage Vortex Effect on hydrogen-combustion Flow around 3D Turbine Blade

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Journal of Thermal Science 2008年第2期17卷 186-192页

作者： Naoto Miyama Kazuaki Inaba Makoto Yamamoto Department of Mechanical Engineering Tokyo University of Science Graduate Aeronautical Laboratories California Institute of Technology

In these years, a lot of environmental problems such as air pollution and exhaustion of fossil fuels have been discussed intensively. In our laboratory, a hydrogen-fueled propulsion system has been researched as an alternative to conventional systems. A hydrogen-fueled propulsion system is expected to have higher power, lighter weight and lower emissions. However, for the practical use, there exist many problems that must be overcome. Considering these backgrounds, jet engines with hydrogen-fueled combustion within a turbine blade passage have been studied. Although some studies have been made on injecting and burning hydrogen fuel from a stator surface, little is known about the interaction between a tip leakage vortex near the suction side of a rotor tip and hydrogen-fueled combustion. The purpose of this study is to clarify the influence of the tip leakage vortex on the characteristics of the 3-dimensional flow field with hydrogen-fueled combustion within a turbine blade passage. Reynolds-averaged compressible Navier-Stokes equations are solved with incorporating a k-ε turbulence and a reduced chemical mechanism models. Using the computational results, the 3-dimensional turbulent flow field with chemical reactions is numerically visualized, and the three-dimensional turbulent flow fields with hydrogen combustion and the structure of the tip leakage vortex are investigated.

关键词： numerical simulation CFD gas turbine hydrogen combustion tip leakage vortex

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CFD based exploration of the dry-low-NO_(x) hydrogen micromix combustion technology at increased energy densities

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Propulsion and Power Research 2017年第1期6卷 15-24页

作者： A.Haj Ayed K.Kusterer H.H.-W.Funke J.Keinz D.Bohn B&B-AGEMA GmbH.Jiilicher Str.338 Aachen 52070Germany FH Aachen University of Applied Sciences Hohenstaufenallee 6Aachen 52064Germany RWTH Aachen University Templergraben 55Aachen 52062Germany

Combined with the use of renewable energy sources for its production,hydrogen represents a possible alternative gas tuibine fuel within future low emission power *** to the large difference in the physical properties of hydrogen compared to other fuels such as natural gas,well established gas tuibine combustion systems cannot be directly applied for dry-low-NO_(x)(DLN)hydrogen ***,the development of DLN combustion technologies is an essential and challenging task for the future of hydrogen fuelled gas *** DLN micromix combustion principle for hydrogen fuel has been developed to significantly reduce NO_(x)-*** combustion principle is based on cross-flow mixing of air and gaseous hydrogen which reacts in multiple miniaturized diffusion-type *** major advantages of this combustion principle are the inherent safety against flash-back and the low NO_(x)-emlssions due to a very short residence time of reactants in the flame region of the *** micromix combustion technology has been already proven experimentally and numerically for pure hydrogen fuel operation at different energy density *** aim of the present study is to analyze the influence of different geometry parameter variations on the flame structure and the NO_(x)emission and to identify the most relevant design parameters,aiming to provide a physical understanding of the micromix flame sensitivity to the burner design and identify further optimization potential of this innovative combustion technology while increasing its energy density and making it mature enough for real gas turbine *** study reveals great optimization potential of the micromix combustion technology with respect to the DLN characteristics and gives insight into the impact of geometry modifications on flame structure and NO_(x)*** allows to further increase the energy density of the micromix burners and to integrate this technology in industrial gas turbin

关键词： Micromix combustion hydrogen gas turbine Dry-low-NO_(x)(DLN)combustion hydrogen combustion High hydrogen combustion

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Experimental and numerical investigations of the dry-low-NO_(x) hydrogen micromix combustion chamber of an industrial gas turbine

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Propulsion and Power Research 2015年第3期4卷 123-131页

作者： A.Haj Ayed K.Kusterer H.H.-W.Funke J.Keinz C.Striegan D.Bohn B&B-AGEMA GmbH Jülicher Str.338Aachen 52070Germany FH Aachen University of Applied Sciences Hohenstaufenallee 6Aachen 52064Germany RWTH Aachen University Templergraben 55Aachen 52062Germany

Combined with the use of renewable energy sources for its production,hydrogen represents a possible alternative gas turbine fuel within future low emission power *** to the large difference in the physical properties of hydrogen compared to other fuels such as natural gas,well established gas turbine combustion systems cannot be directly applied for dry-low-NO_(x)(DLN)hydrogen ***,the development of DLN combustion technologies is an essential and challenging task for the future of hydrogen fuelled gas *** DLN micromix combustion principle for hydrogen fuel has been developed to significantly reduce NO_(x) *** combustion principle is based on cross-flow mixing of air and gaseous hydrogen which reacts in multiple miniaturized diffusion-type *** major advantages of this combustion principle are the inherent safety against flash-back and the low NO_(x) emissions due to a very short residence time of reactants in the flame region of the *** micromix combustion technology has been already proven experimentally and numerically for pure hydrogen fuel operation at different energy density *** aim of the present study is to apply and compare different combustion models for the characterization of the micromix flame structure,its interaction with the flow field and its NO_(x) *** study reveals great potential for the successful application of numerical flow simulation to predict flame structure and NO_(x) emission level of micromix hydrogen combustion,help understanding the flow phenomena related with the micromixing,reaction zone and NO_(x) formation and support further optimization of the burner performance.

关键词： Micromix combustion hydrogen gas turbine Dry-low-NO_(x)(DLN) combustion hydrogen combustion High hydrogen combustion

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Virtual Development of hydrogen-powered Commercial Vehicles:combustion and Exhaust-after-treatment

Virtual Development of Hydrogen-powered Commercial Vehicles:...

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2021中国汽车工程学会年会暨展览会

作者： Rezaei Reza Qing Li Hayduk Christopher David Kovacs Marian Mennig Thaddaeus Delebinski IAV GmbH

hydrogen as a fuel that can be generated from biomass or renewable energies such as sun and wind is considered to be one of the most important energy solutions for reducing CO in the *** model-based development approach is widely used from the early concept phase through to detailed component design and finally in series development and in virtual field *** the concept phase,the use of model-based development can help optimize both the thermodynamics of the engine and the hardware *** virtual development of the hydrogen combustion system,including the charge motion and the port design,as well as the optimization of the air-fuel ratio taking into account the fuel consumption and the exhaust gas after-treatment system(EAT) can be well performed with the model-based *** paper is focussed on hydrogen combustion engines for heavy-duty commercial *** on a roadmap for emission regulation and scenarios for future heavy-duty engines,the requirements for the combustion system and NO reduction are defined and the feasibility of the overall system to achieve the target is *** main advantages of hydrogen combustion are its wide flammability range and very high flame speed compared to other fossil ***,it can be well used for lean burn combustion with much better fuel consumption and very low NO *** potentials and requirements of the overall hydrogen propulsion system will be *** on available measurement data of a 2 L single-cylinder test engine,detailed analysis of the potential using EGR to reduce NO emissions will be ***,abnormal combustion phenomena such as backfire are shown based on an example at a high load operating point is *** the next step,the 1 D engine model is setup and calibrated for hydrogen combustion *** transfer,combustion and emission model are developed and calibrated using single cylinder engine *** engine-out NO traces in

关键词： hydrogen combustion model-based development H2-DeNOx commercial vehicle transient Cycle

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The Roadmap to 55% BTE of a Heavy-Duty combustion Engine

The Roadmap to 55% BTE of a Heavy-Duty Combustion Engine

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2021中国汽车工程学会年会暨展览会

作者： Rezaei Reza George Tom B?hme Jan Krause Matthias Leesch Mirko Seebode J?rn IAV GmbHDr.2. IAV GmbH

The transportation industry has to face major challenges,because of global efforts towards a reduction of greenhouse gases and a general tendency towards *** EU reduction targets for example stipulate an OEM specific fleet CO decrease of 30% by ***,future emission legislation will potentially require measures to achieve ultra-low NO specifications,which will result in a fuel consumption *** this context,multiple technology scenarios ranging from cabin & vehicle design,efficient conventional combustion engines to hydrogen combustion engines and electric powertrain concepts can be expected in the *** total cost of ownership viewpoints and representative fleet composition calculations,IAV has derived possible scenarios for a future heavy-duty powertrain configuration:a high efficiency diesel powertrain using mechanical,thermodynamic and thermal management measures in a mid-term,and an advanced engine design for hydrogen combustion and e-fuels in a long-term scenario will be described in detail.

关键词： CO2 targets technology roadmap efficiency phase change cooling waste heat recover hydrogen combustion

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STUDY ON CONTAINMENT PRESSURE LOAD FROM hydrogen MITIGATION

STUDY ON CONTAINMENT PRESSURE LOAD FROM HYDROGEN MITIGATION

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第十三届国际核工程大会

作者： Chunjing Song Minghui Weng Yong Wang Shanghai Nuclear Engineering Research and Design Institute

Various risk studies have shown that,in the case of a severe accident in a nuclear power plant,hydrogen combustion could lead to early or late containment failure and release of radioactive materia

关键词： hydrogen combustion Inerting Containment Pressure Load

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