Critical Conditions for the Ignition of a Gel Fuel under Different Heating Schemes

A model was developed to research the critical conditions and time characteristics of the ignition of gel fuels in the course of conductive, convective, radiant and mixed heat transfer. MATLAB was used for numerical modeling. Original MATLAB code was established pursuant to the developed mathematical model. For gel fuel ignition at initial temperatures corresponding to cryogenic storage conditions with different heating schemes, a numerical analysis of interconnected processes of heat and mass transfer in the chemical reaction conditions and exothermic and endothermic phase transitions was conducted. The model was tested by comparing the theoretical results with the experimental data. Dependencies were established between the key process characteristic (i.e., the ignition delay time) and the ambient temperature when the following parameters were varied: emissivity, heat emission coefficient, activation energy and pre-exponential factor of the fuel vapor oxidation reaction. The critical values of the main parameters of the energy source were determined. For these values, gel fuel ignition conditions were consistently realized for each heating scheme. The critical heat fluxes necessary and sufficient for the ignition of typical gel fuels were determined.

[1]  Daoan Sun,et al.  Experimental study on atomization characteristics of high-energy-density fuels using a fuel slinger , 2021 .

[2]  P. Strizhak,et al.  Investigating regularities of gas hydrate ignition on a heated surface: Experiments and modelling , 2021 .

[3]  Yazheng Yang,et al.  Progress in research on composite cryogenic propellant tank for large aerospace vehicles , 2021 .

[4]  G. Kuznetsov,et al.  Numerical simulation of ignition of a typical gel fuel particle, based on organic polymer thickener, in a high-temperature air medium , 2021 .

[5]  N. Duić,et al.  Recent progress in sustainable energy-efficient technologies and environmental impacts on energy systems , 2020 .

[6]  D. Glushkov,et al.  Influence of heating intensity and size of gel fuel droplets on ignition characteristics , 2020 .

[7]  M. Massoudi,et al.  Effects of Temperature on the Flow and Heat Transfer in Gel Fuels: A Numerical Study , 2020, Energies.

[8]  G. Kuznetsov,et al.  Heat and mass transfer induced by the ignition of single gel propellant droplets , 2019 .

[9]  D. Glushkov,et al.  Effects of the Initial Gel Fuel Temperature on the Ignition Mechanism and Characteristics of Oil-Filled Cryogel Droplets in the High-Temperature Oxidizer Medium , 2019, Energy & Fuels.

[10]  G. Kuznetsov,et al.  Numerical simulation of gel fuel gas-phase ignition by a local source of limited heat content , 2019, Acta Astronautica.

[11]  Z. Xia,et al.  Experimental investigation of the effects of chamber length and boron content on boron-based gel fuel ramjet performance , 2019, Acta Astronautica.

[12]  Seung Wook Baek,et al.  The Viscosity and Combustion Characteristics of Single-Droplet Water-Diesel Emulsion , 2019, Energies.

[13]  K. Vershinina,et al.  Oil-Filled Cryogels: New Approach for Storage and Utilization of Liquid Combustible Wastes , 2019, Industrial & Engineering Chemistry Research.

[14]  D. Glushkov,et al.  The gel fuel ignition at local conductive heating , 2018, International Journal of Heat and Mass Transfer.

[15]  P. Strizhak,et al.  Environmental aspects of converting municipal solid waste into energy as part of composite fuels , 2018, Journal of Cleaner Production.

[16]  Guoliang Mao,et al.  Effect of the Evaluation and Mechanism Analysis of a Novel Nanohybrid Pour Point Depressant on Facilitating Flow Properties of Crude Oil , 2018, Energy & Fuels.

[17]  Richard L. Axelbaum,et al.  An approach to estimating flame radiation in combustion chambers containing suspended-particles , 2017 .

[18]  S. Baek,et al.  Hypergolicity and ignition delay study of pure and energized ethanol gel fuel with hydrogen peroxide , 2017 .

[19]  Manisha B. Padwal,et al.  Experimental Characterization of Gelled Jet A1 Spray Flames , 2016 .

[20]  Helmut Ciezki,et al.  Some Aspects on Safety and Environmental Impact of the German Green Gel Propulsion Technology , 2016 .

[21]  G. Kuznetsov,et al.  Stability of composite solid propellant ignition by a local source of limited energy capacity , 2014 .

[22]  G. Kuznetsov,et al.  Computational Investigation of Heat and Mass Transfer Processes in a Gel-Like Fuel Ignited by a Limited-Capacity Source , 2013 .

[23]  W. Nie,et al.  Unsteady Combustion Model of Nonmetalized Organic Gel Fuel Droplet , 2012 .

[24]  Zhen He,et al.  Experimental Study on the Combustion and Microexplosion of Freely Falling Gelled Unsymmetrical Dimethylhydrazine (UDMH) Fuel Droplets , 2012 .

[25]  J. Caton.  The thermodynamic characteristics of high efficiency, internal-combustion engines , 2012 .

[26]  Nadir Yilmaz,et al.  Performance and emission characteristics of a diesel engine fuelled with biodiesel–ethanol and biodiesel–methanol blends at elevated air temperatures , 2012 .

[27]  D. Mishra,et al.  Effects of gellant concentration on the burning and flame structure of organic gel propellant droplets , 2011 .

[28]  J. Greenberg,et al.  Theoretical Model of the Transient Combustion of Organic-Gellant-Based Gel Fuel Droplets , 2010 .

[29]  A. Peretz,et al.  Rheological Matching of Gel Propellants , 2010 .

[30]  J. Greenberg,et al.  A Simple Phenomenological Model of an Organic Gel Spray Diffusion Flame , 2007 .

[31]  Y. Cohen,et al.  Combustion of gel fuels based on organic gellants , 2006 .

[32]  B. Natan,et al.  THE STATUS OF GEL PROPELLANTS IN YEAR 2000 , 2002 .

[33]  B. Natan,et al.  Combustion Characteristics of Gel Fuels , 2000 .

[34]  B. L. Gupta,et al.  Formulation & Storage Studies on Hydrazine-Based Gelled Propellants. , 1996 .

[35]  S. Kutateladze,et al.  Heat Transfer, Mass Transfer, and Friction in Turbulent Boundary Layers , 1990 .