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Journal articles on the topic 'Two phase flow combustion'

Author: Grafiati

Published: 7 July 2024

Last updated: 31 July 2025

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1

Tolpadi, A. K. "Calculation of Two-Phase Flow in Gas Turbine Combustors." Journal of Engineering for Gas Turbines and Power 117, no. 4 (1995): 695–703. http://dx.doi.org/10.1115/1.2815455.

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A method is presented for computing steady two-phase turbulent combusting flow in a gas turbine combustor. The gas phase equations are solved in an Eulerian frame of reference. The two-phase calculations are performed by using a liquid droplet spray combustion model and treating the motion of the evaporating fuel droplets in a Lagrangian frame of reference. The numerical algorithm employs nonorthogonal curvilinear coordinates, a multigrid iterative solution procedure, the standard k-ε turbulence model, and a combustion model comprising an assumed shape probability density function and the cons

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2

Klose, G., R. Schmehl, R. Meier, et al. "Evaluation of Advanced Two-Phase Flow and Combustion Models for Predicting Low Emission Combustors." Journal of Engineering for Gas Turbines and Power 123, no. 4 (2000): 817–23. http://dx.doi.org/10.1115/1.1377010.

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The development of low-emission aero-engine combustors strongly depends on the availability of accurate and efficient numerical models. The prediction of the interaction between two-phase flow and chemical combustion is one of the major objectives of the simulation of combustor flows. In this paper, predictions of a swirl stabilized model combustor are compared to experimental data. The computational method is based on an Eulerian two-phase model in conjunction with an eddy dissipation (ED) and a presumed-shape-PDF (JPDF) combustion model. The combination of an Eulerian two-phase model with a

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3

Som, S. K., and N. Y. Sharma. "Energy and Exergy Balance in the Process of Spray Combustion in a Gas Turbine Combustor." Journal of Heat Transfer 124, no. 5 (2002): 828–36. http://dx.doi.org/10.1115/1.1484393.

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A theoretical model of exergy balance based on availability transfer and flow availability in the process of spray combustion in a gas turbine combustor has been developed to evaluate the total thermodynamic irreversibility and second law efficiency of the process at various operating conditions, for fuels with different volatilities. The velocity, temperature and concentration fields in the combustor, required for the evaluation of the flow availabilities and process irreversibilities, have been computed numerically from a two phase separated flow model of spray combustion. The total thermody

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4

Zhang, Qun, Hua Sheng Xu, Tao Gui, Shun Li Sun, Yue Wu, and Dong Bo Yan. "Investigation on Reaction Flow Field of Low Emission TAPS Combustors." Applied Mechanics and Materials 694 (November 2014): 45–48. http://dx.doi.org/10.4028/www.scientific.net/amm.694.45.

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A twin annular premixing swirler (TAPS) combustor model of low emissions was developed in this study. And computational studies on combustion process in the combustor model were carried out. Standard k-ε Turbulence Model, PDF non-premixed combustion model, Zeldovich thermal NOx formation model and DPM two-phase model were employed. The distributions of some key performance parameters such as gas temperature, flow velocity, concentrations of NOx and CO emissions were obtained and analyzed. At the same time, combustion mechanics inside the TAPS combustor model were investigated. The computationa

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5

Lin, Jih Lung. "Two-phase flow effect on hybrid rocket combustion." Acta Astronautica 65, no. 7-8 (2009): 1042–57. http://dx.doi.org/10.1016/j.actaastro.2009.03.020.

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6

Som, S. K., S. S. Mondal, and S. K. Dash. "Energy and Exergy Balance in the Process of Pulverized Coal Combustion in a Tubular Combustor." Journal of Heat Transfer 127, no. 12 (2005): 1322–33. http://dx.doi.org/10.1115/1.2101860.

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A theoretical model of exergy balance, based on availability transfer and flow availability, in the process of pulverized coal combustion in a tubular air-coal combustor has been developed to evaluate the total thermodynamic irreversibility and second law efficiency of the process at various operating conditions. The velocity, temperature, and concentration fields required for the evaluation of flow availability have been computed numerically from a two-phase separated flow model on a Eulerian-Lagrangian frame in the process of combustion of pulverized coal particles in air. The total thermody

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7

Chan, S. H., and M. M. M. Abou-Ellail. "A Two-Fluid Model for Reacting Turbulent Two-Phase Flows." Journal of Heat Transfer 116, no. 2 (1994): 427–35. http://dx.doi.org/10.1115/1.2911415.

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A reacting two-fluid model, based on the solution of separate transport equations for reacting gas-liquid two-phase flow, is presented. New time-mean transport equations for two-phase mixture fraction f and its variance g are derived. The new two-fluid transport equations for f and g are useful for two-phase reacting flows in which phases strongly interact. They are applicable to both submerged and nonsubmerged combustion. A pdf approach to the reaction process is adopted. The mixture fraction pdf assumes the shape of a beta function while the instantaneous thermochemical properties are comput

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8

Zhang, Xiang Yu, Guo Qiang He, Pei Jin Liu, and Jiang Li. "Heat Flux Measurement Method of Two-Phase Flow in SRM." Applied Mechanics and Materials 152-154 (January 2012): 883–88. http://dx.doi.org/10.4028/www.scientific.net/amm.152-154.883.

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Accurate information on heat transfer data of combustion products in the solid rocket motor chamber is a crucial prerequisite for the engine thermal protection. A measurement technique was well developed to acquire steady-state heat flux data of two-phase flow and was used successfully in the hostile environment. Experimental heat flux measurement has been obtained with an innovative designed instrument by simulating the flow field of complex charging configuration. The total heat flux of combustion products in the chamber was brought away by the coolant and calculated by its enthalpy rise in

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9

Ahmad Fuad Abdul Rasid and Yang Zhang. "Combustion Phases of Evaporating Neat Fuel Droplet." Journal of Advanced Research in Fluid Mechanics and Thermal Sciences 96, no. 1 (2022): 60–69. http://dx.doi.org/10.37934/arfmts.96.1.6069.

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The combustion characteristics of fuel spray can be examined at a basic level by a fuel droplet combustion study. Evaporation processes of a fuel droplet involves few combustion phases mainly heating, boiling and disruptive phase. The transition of phases is found to be caused by two transient combustion process; mainly droplet heating and fuel vapour accumulation. The duration of combustion phases of tested neat fuel droplet in the present work is found to be consistent for each fuel. High volatility fuel is found to have the shortest duration of droplet heating and fuel vapour accumulation.

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10

Hsiao Tzu, Chang, Hourng Lih Wu, and Lai Chen Chien. "Nonequilibrium hydrogen combustion in one- and two-phase supersonic flow." International Communications in Heat and Mass Transfer 24, no. 3 (1997): 323–35. http://dx.doi.org/10.1016/s0735-1933(97)00018-3.

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11

Gao, Xiao, Mao Lei, and Weiwei Xu. "Numerical simulation and improvement of combustor structure in 3D printed sand recycling system." Polish Journal of Chemical Technology 25, no. 4 (2023): 19–27. http://dx.doi.org/10.2478/pjct-2023-0034.

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Abstract In this paper, a new combustor with an output of 5 t/h is designed based on a computational particle fluid dynamics (CPFD) model. The flow field simulation is combined with the combustion simulation to analyze the internal two-phase flow, temperature field, and combustion products. The combustor structure was optimized. The simulation results show that the recovery efficiency of the waste sand and the energy utilization of the combustor can be improved under the original structure. The sand bed has a significant effect on flow field characteristics. The increase in particle temperatur

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12

Hao, Zhang, Yan Mi, and Li Jiahang. "Influence of Axial Flow Field Parameter Fluctuations on Performance of Scramjet Combustor." Journal of Physics: Conference Series 2913, no. 1 (2024): 012005. https://doi.org/10.1088/1742-6596/2913/1/012005.

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Abstract When air-breathing aircraft is flying over a wide area, the upflow of the combustor central axis will change greatly, and the flow field parameters will fluctuate along the axis. Therefore, it is necessary to carry out a study on the influence of axis flow field parameter fluctuation on combustion chamber performance, so as to provide relevant theoretical support for the combustion chamber of air-breathing aircraft in wide-area flight design. Based on the N-S gas-phase control model, combined with combustion model, turbulence model, burning rate model and mass transfer model, a numeri

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13

Kim, Meeri. "Simulating the detonation flow field of a two-phase rotating detonation ramjet." Scilight 2022, no. 46 (2022): 461103. http://dx.doi.org/10.1063/10.0015147.

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14

Moiseeva, K. M. "COMBUSTION OF ALUMINUM POWDER-AIR SUSPENSION IN A SWIRL FLOW." Eurasian Physical Technical Journal 18, no. 2 (2021): 47–55. http://dx.doi.org/10.31489/2021no2/47-55.

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The article is devoted to the numerical solution of the problem of the combustion of powder metal fuel in a combustion chamber with swirling flow. A physico-mathematical model of the flow of an air suspension of aluminum powder in a swirling flow in a cylindrical combustion chamber with a sudden expansion is presented. The physical and mathematical formulation of the problem is based on the approaches of the mechanics of two-phase reacting media. The solution was carried out using the arbitrary discontinuity decay method. The results of a numerical parametric study of the features of the combu

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15

M. Rashad, Mahmoud, Xiao Bing Zhang, Hazem El Sadek, and Cheng Cheng. "Two-Phase Flow Interior Ballistics Model of Naval Large Caliber Guided Projectile Gun System." Applied Mechanics and Materials 465-466 (December 2013): 592–96. http://dx.doi.org/10.4028/www.scientific.net/amm.465-466.592.

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The two-phase flow mathematical model for the solid granular propellant and its products of combustion inside large caliber naval gun guided projectile system (NGGPS) during interior ballistic cycle is presented. The model includes the governing equations of mass, momentum and energy for both phases as well as the constitutive laws. The discharged combustion products from the igniter vent-holes into the chamber are acquired by incorporation in the model the two-phase flow model of the bayonet igniter. The system of equations of the two-phase flow model is solved using the second order accurate

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16

Vasyl, Loginov, Rublov Volodymyr, and Yelansky Аlexandr. "ASSESSMENT OF THE AUTHENTICITY OF A SEMIEMPIRICAL TURBULENT COMBUSTION METHOD IN AFTERBURNER OF A GAS TURBINE ENGINE." TECHNOLOGY AUDIT AND PRODUCTION RESERVES 2, no. 1(52) (2020): 12–15. https://doi.org/10.15587/2312-8372.2020.199964.

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<em>The object of research is the working process of the afterburner of the combustion chamber of a turbojet dual-circuit engine with flow mixing. The research was aimed at developing a comprehensive methodology for calculating the afterburner-output device of a forced turbojet engine, taking into account the unevenness of the coefficient of oxygen excess and flow turbulence.</em> <em>To calculate the process of mixture formation, let’s use the model of the separate flow of the gas and liquid phases, taking into account the influence of finite transfer rates between the phases. The gas p

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17

Hwang, Donghyun, and Kyubok Ahn. "Experimental Study on Dynamic Combustion Characteristics in Swirl-Stabilized Combustors." Energies 14, no. 6 (2021): 1609. http://dx.doi.org/10.3390/en14061609.

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An experimental study was performed to investigate the combustion instability characteristics of swirl-stabilized combustors. A premixed gas composed of ethylene and air was burned under various flow and geometric conditions. Experiments were conducted by changing the inlet mean velocity, equivalence ratio, swirler vane angle, and combustor length. Two dynamic pressure sensors, a hot-wire anemometer, and a photomultiplier tube were installed to detect the pressure oscillations, velocity perturbations, and heat release fluctuations in the inlet and combustion chambers, respectively. An ICCD cam

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18

Zhang Peng, Hong Yan-Ji, Ding Xiao-Yu, Shen Shuang-Yan, and Feng Xi-Ping. "Effect of plasma on boron-based two-phase flow diffusion combustion." Acta Physica Sinica 64, no. 20 (2015): 205203. http://dx.doi.org/10.7498/aps.64.205203.

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19

MARGOLIS, STEPHEN B. "FUNDAMENTAL TWO-PHASE-FLOW MODELS OF COMBUSTION IN POROUS ENERGETIC MATERIALS." Combustion Science and Technology 177, no. 5-6 (2005): 1183–229. http://dx.doi.org/10.1080/00102200590927049.

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20

Li, Zhengang, Zhancheng Guo, Xuzhong Gong, and Huiqing Tang. "Kinetic characteristics of pulverized coal combustion in the two-phase flow." Energy 55 (June 2013): 585–93. http://dx.doi.org/10.1016/j.energy.2013.04.028.

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21

Markatos, N. C. "Modelling of two-phase transient flow and combustion of granular propellants." International Journal of Multiphase Flow 12, no. 6 (1986): 913–33. http://dx.doi.org/10.1016/0301-9322(86)90035-2.

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22

Askari Mahvelati, Ehsan, Mario Forcinito, Laurent Fitschy, and Arthur Maesen. "Three-Dimensional CFD Model Development and Validation for Once-Through Steam Generator (OTSG): Coupling Combustion, Heat Transfer and Steam Generation." ChemEngineering 6, no. 2 (2022): 23. http://dx.doi.org/10.3390/chemengineering6020023.

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The current research studies the coupled combustion inside the furnace and the steam generation inside the radiant and convection tubes through a typical Once-Through Steam Generator (OTSG). A 3-D CFD model coupling the combustion and the two-phase flow was developed to model the entire system of OTSG. Once the combustion simulation was converged, the results were compared to field data showing a convincing agreement. The CFD analysis provides the detailed flow behavior inside the combustion chamber and the stack, as well as the two-phase flow steam generation process in the radiant and convec

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23

Sultanov, T. S., та G. A. Glebov. "Numerical Computation of Specific Impulse and Internal Flow Parameters in Solid Fuel Rocket Motors with Two-Phase Сombustion Products". Herald of the Bauman Moscow State Technical University. Series Mechanical Engineering, № 3 (138) (вересень 2021): 98–107. http://dx.doi.org/10.18698/0236-3941-2021-3-98-107.

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Eulerian --- Lagrangian method was used in the Fluent computational fluid dynamics system to calculate motion of the two-phase combustion products in the solid fuel rocket motor combustion chamber and nozzle. Condensed phase is assumed to consist of spherical particles with the same diameter, which dimensions are not changing along the motion trajectory. Flows with particle diameters of 3, 5, 7, 9, and 11 μm were investigated. Four versions of the engine combustion chamber configuration were examined: with slotted and smooth cylindrical charge channels, each with external and submerged nozzles

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24

Xiao, Yumin, R. S. Amano, Timin Cai, and Jiang Li. "New Method to Determine the Velocities of Particles on a Solid Propellant Surface in a Solid Rocket Motor." Journal of Heat Transfer 127, no. 9 (2005): 1057–61. http://dx.doi.org/10.1115/1.1999652.

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Use of aluminized composite solid propellants and submerged nozzles are common in solid rocket motors (SRM). Due to the generation of slag, which injects into a combusted gas flow, a two-phase flow pattern is one of the main flow characteristics that need to be investigated in SRM. Validation of two-phase flow modeling in a solid rocket motor combustion chamber is the focus of this research. The particles’ boundary conditions constrain their trajectories, which affect both the two-phase flow calculations, and the evaluation of the slag accumulation. A harsh operation environment in the SRM wit

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25

Liu, De Song, Hong Fu Qiang, Xue Li Xia, and Guang Wang. "Numerical Simulation of the Two-Phase Turbulent Combustion Flow in the Multicomponent Propellant Rocket Engine." Advanced Materials Research 452-453 (January 2012): 1334–38. http://dx.doi.org/10.4028/www.scientific.net/amr.452-453.1334.

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The numerical simulation, based on computational fluid dynamics methodology, has been performed to study the two-phase turbulent combustion flow in rocket engine using non-metallized multicomponent propellant. A reduced reaction mechanism is developed for modelling combustion of fuel droplets in the absence of metal. Gas governing equations are two dimensional axisymmetric N-S equations in Eulerian coordinates. The trajectory model is adopted to analyse the droplet-phase including the droplet collision, breakup and evaporation. The gas flow is influenced by the droplets by adding source term t

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26

Guo, Yinghua, Ruijing Li, Wenfang Zhu, Yuan Feng, and Pengjie Chen. "Interior Ballistic Calculation and Analysis of Sudden Change of Motion Resistance of a Caliber Projectile in Bore." Journal of Physics: Conference Series 2891, no. 15 (2024): 152029. https://doi.org/10.1088/1742-6596/2891/15/152029.

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Abstract In this paper, three models are established to analyze and calculate the bore explosion phenomenon of a gun, namely, constant volume combustion model, classical interior ballistic model and one-dimensional two-phase flow. From the calculation results, the one-dimensional two-phase flow model has the largest calculation value, followed by the constant volume combustion model, while the classical interior ballistic calculation value is the smallest, and the one-dimensional two-phase flow model considers the situation closer to the actual situation. The calculation results of one-dimensi

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27

Hao, Guancheng, Bowen Pang, Qilin Zhang, Fei Cui, Sijia Sun, and Shuo Liu. "Flame synchronization and flow field analysis of double candles." Journal of Physics: Conference Series 2247, no. 1 (2022): 012030. http://dx.doi.org/10.1088/1742-6596/2247/1/012030.

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Abstract Flame instability is an interesting topic in combustion science, and it is also of great practical significance for designing high-performance burners. In recent years, the synchronization phenomenon caused by a pair of coupled candles has aroused widespread attention, among which in-phase and anti-phase are two notable examples. In order to understand the flow structure of the flashing flame and the reasons for the synchronization of the flame oscillator, COMSOL flow field analysis technology and MATLAB grey analysis technology were used to analyze the flow field of candles in three

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28

Wang, Bei, Yi Xie, and Jian Guo Xiong. "Gasify Micro-Oil Ignition Technology Based on Level Set Methods." Advanced Materials Research 497 (April 2012): 387–91. http://dx.doi.org/10.4028/www.scientific.net/amr.497.387.

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In order to improve the Micro-oil ignition and low fuel load stable combustion in the thermal power system, the standard k-ε model is used in the analysis of flow field for studying the character of the mixture of coal particles, oil and gas mixture. The trajectories of two-phase flow are simulated by the Level Set Methods (LSM). The results describe the velocity distribution of the X-axis of the two-phase flow, concentration and track of coal particles, the thermal distribution of mixed fluid in the combustion chamber. It provides a theoretical basis for the further study of Micro-oil ignitio

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29

Dobrego, K. V., and I. A. Koznacheev. "Numerical Simulation of Two-Phase System of “Combustible Liquid – Solid Fuel” Combustion in a Fixed Bed." ENERGETIKA. Proceedings of CIS higher education institutions and power engineering associations 62, no. 3 (2019): 247–63. http://dx.doi.org/10.21122/1029-7448-2019-62-3-247-263.

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Investigation of combustion of complex heterogeneous systems and particularly of twophase “combustible liquid – solid fuel” systems is topical because of the need to improve combustion of multicomponent and non-standard fuels as well as for resolution of specific ecological problems. The qualitative and quantitative peculiarities of combustion of two model combustible systems, notionally corresponding to the “sawdust – oil” and “wood chips – oil” mixtures are investigated numerically. The main peculiarity of the systems is volatility of the fluid component, being gaseous-flow driven inside por

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30

Dong, Ming, MaoZhao Xie, and SuFen Li. "Numerical study on turbulent two-phase flow in porous medium combustion chamber." Science in China Series E: Technological Sciences 52, no. 6 (2009): 1511–20. http://dx.doi.org/10.1007/s11431-009-0170-9.

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31

Ha, M. Y. "A Numerical Study of Droplet Evaporation and Combustion in the Presence of an Oscillating Flow." Journal of Energy Resources Technology 119, no. 2 (1997): 109–19. http://dx.doi.org/10.1115/1.2794974.

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The two-dimensional, unsteady, laminar conservation equations for mass, momentum, energy, and species transport in the gas phase are solved numerically in spherical coordinates in order to study heat and mass transfer, and combustion around a single spherical droplet. The droplet mass, momentum, and energy equations are also solved simultaneously with the gas phase equations in order to investigate the effects of droplet entrainment and heating in the oscillating flow with and without a steady velocity. The numerical solution for the case of single droplet combustion gives the droplet diameter

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32

Raju, M. S., and W. A. Sirignano. "Spray Computations in a Centerbody Combustor." Journal of Engineering for Gas Turbines and Power 111, no. 4 (1989): 710–18. http://dx.doi.org/10.1115/1.3240317.

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A hybrid Eulerian–Lagrangian method is employed to model the reactive flow field of a centerbody combustor. The unsteady two-dimensional gas-phase equations are represented in Eulerian coordinates and liquid-phase equations are formulated in Lagrangian coordinates. The gas-phase equations based on the conservation of mass, momentum, and energy are supplemented by turbulence and combustion models. The vaporization model takes into account the transient effects associated with the droplet heating and liquid-phase internal circulation. The integration scheme is based on the TEACH algorithm for ga

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33

Ren, Zhao Xin, Bing Wang, and Hui Qiang Zhang. "Large Eddy Simulation of Two-Phase Mixing Layer Flows in the Scramjet." Applied Mechanics and Materials 249-250 (December 2012): 428–33. http://dx.doi.org/10.4028/www.scientific.net/amm.249-250.428.

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To study the dispersion of fuel droplets in the supersonic flow and reveal the momentum and heat exchanges between two phases, a large eddy simulation (LES) and particle Lagrangian tracking model were employed to numerically simulate two-phase mixing layer flows, using the one-way coupling method. The velocity fluctuation disturbances were added to inspire the flow instabilities. The motions of droplets in different diameters and droplets’ response to the large scale eddies were analyzed. The results indicated that droplets of 1micro diameter below are corresponded with the motions of coherent

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34

Nemoda, Stevan, Milica Mladenovic, Milijana Paprika, Dragoljub Dakic, Aleksandar Eric, and Mirko Komatina. "Euler-Euler granular flow model of liquid fuels combustion in a fluidized reactor." Journal of the Serbian Chemical Society 80, no. 3 (2015): 377–89. http://dx.doi.org/10.2298/jsc140130029n.

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The paper deals with the numerical simulation of liquid fuel combustion in a fluidized reactor using a two-fluid Eulerian-Eulerian fluidized bed modeling incorporating the kinetic theory of granular flow (KTGF) to gas and solid phase flow prediction. The comprehensive model of the complex processes in fluidized combustion chamber incorporates, besides gas and particular phase velocity fields? prediction, also the energy equations for gas and solid phase and the transport equations of chemical species conservation with the source terms due to the conversion of chemical components. Numerical exp

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Dodge, F. T., S. T. Green, and J. E. Johnson. "Characterization of Injection Nozzles for Gas-Solid Flow Applications." Journal of Fluids Engineering 113, no. 3 (1991): 469–74. http://dx.doi.org/10.1115/1.2909519.

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Laser phase-doppler velocimetry measurements have been used to characterize the particle-gas sprays produced by straight-tube nozzles that simulate idealized fuel injectors for solid fuel combustion systems. Tests were conducted on two nozzle sizes, for two particle sizes, two loading ratios, and two gas velocities. The Reynolds numbers was varied from 9500 to 19000, and the Stokes number from 1.9 to 61.4. It was found that the velocities of the particles in the spray decelerate more slowly, and the velocity profiles are generally more narrow, than for a single-phase free-jet. The turbulence l

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Zhang, De Zhi, Ying Ai Jin, De Yuan Su, and Qing Gao. "Numerical Analysis of Flow at Water Jacket of an Internal Combustion Engine." Advanced Materials Research 282-283 (July 2011): 702–5. http://dx.doi.org/10.4028/www.scientific.net/amr.282-283.702.

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With the increasing degree of the enhancement of engine, engine cooling system design is considered particularly important. This paper used an established three-dimensional model of an engine water jacket to study, and used UDF function in the two-phase flow of the CFD, describe the mathematical model and simulation the engine at different operating conditions, and get the water jacket flow rate transfer thermal process. Finally, the results of the relationship between the engine water jacket of boiling heat transfer and flow velocity have been studied, and the importance of using two-phase fl

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Deniz Canal, Cansu, Erhan Böke, and Ali Cemal Benim. "Numerical analysis of pulverized biomass combustion." E3S Web of Conferences 321 (2021): 01001. http://dx.doi.org/10.1051/e3sconf/202132101001.

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Combustion of pulverized biomass in a laboratory swirl burner is computationally investigated. The two-phase flow is modelled by an Eulerian-Lagrangian approach. The particle size distribution and turbulent particle dispersion are considered. The radiative heat transfer is modelled by the P1 method. For modelling turbulence, different RANS modelling approaches are applied. The pyrolysis of the solid fuel is modelled by a single step mechanism. For the combustion of the volatiles a two-step reaction mechanism is applied. The gas-phase conversion rate is modelled by the Eddy Dissipation Model, c

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38

Minkov, Leonid, Ernst R. Shrager, and Elizaveta V. Pikushchak. "Propellant Grain with Maximum Combustion Efficiency of Metal." Key Engineering Materials 685 (February 2016): 325–29. http://dx.doi.org/10.4028/www.scientific.net/kem.685.325.

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This paper reports on the ways of allocating the metal particles in the propellant grain of tube cross-sectional type to provide maximum combustion efficiency of metal. Two-dimensional flow field and the burning rate law govern a transport of the burning metal particles. The analytical correlation for the optimum allocation of metal particles in the case-bounded propellant grain of tube cross-sectional type under the assumption of equilibrium two-phase flow is deduced.

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39

Huo, Chao, Hongbo Xu, Jie Hu, and Tengfei Luo. "Numerical Study on Pressure Oscillations in a Solid Rocket Motor with Backward Step Configuration Under Two-Phase Flow Interactions." Aerospace 11, no. 12 (2024): 1054. https://doi.org/10.3390/aerospace11121054.

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The pressure oscillation caused by vortex–acoustic coupling is one of the main gain factors that results in the combustion instability of motors. Focusing on a solid rocket motor with a backward step configuration that can generate a corner vortex, this study aims to investigate the pressure oscillation characteristics in a combustion chamber under two-phase flow interactions through numerical simulations. The two-phase flow discrete phase model (DPM) was chosen to study particle motion and two-phase interactions. The numerical methodology was hence established by coupling the DPM with the lar

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40

Breuer, Michael, and Michael Alletto. "Two–phase flow predictions of the turbulent flow in a combustion chamber including particle–particle interactions." Journal of Physics: Conference Series 318, no. 5 (2011): 052002. http://dx.doi.org/10.1088/1742-6596/318/5/052002.

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41

Zhou, L. X., F. Wang, L. Y. Hu, K. Li, and K. Luo. "A review on studies of a SOM combustion model for single-and-two-phase combustion." International Journal of Heat and Mass Transfer 96 (May 2016): 154–63. http://dx.doi.org/10.1016/j.ijheatmasstransfer.2016.01.019.

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Epple, Bernd, Woody Fiveland, Bernd Krohmer, Galen Richards, and Ali C. Benim. "ASSESSMENT OF TWO-PHASE FLOW MODELS FOR THE SIMULATION OF PULVERIZED COAL COMBUSTION." Clean Air: International Journal on Energy for a Clean Environment 6, no. 3 (2005): 267–87. http://dx.doi.org/10.1615/interjenercleanenv.v6.i3.50.

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Benim, A. C., B. Epple, and B. Krohmer. "Modelling of pulverised coal combustion by a Eulerian-Eulerian two-phase flow formulation." Progress in Computational Fluid Dynamics, An International Journal 5, no. 6 (2005): 345. http://dx.doi.org/10.1504/pcfd.2005.007067.

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LI, BAOMING, and DANIEL Y. KWOK. "Two-phase flow simulation of plasma-ignited combustion in an energetic fluid bed." Journal of Plasma Physics 70, no. 2 (2004): 225–35. http://dx.doi.org/10.1017/s002237780300254x.

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Axelbaum, R. L., D. P. DuFaux, C. A. Frey, et al. "Gas-phase combustion synthesis of titanium boride (TiB2) nanocrystallites." Journal of Materials Research 11, no. 4 (1996): 948–54. http://dx.doi.org/10.1557/jmr.1996.0119.

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Two techniques are described for synthesizing nanometer-sized TiB2 particles by gas-phase combustion reactions of sodium vapor with TiCl4 and BCl3: a low-pressure, low-temperature burner and a high-temperature flow reactor. Both methods produce TiB2 particles that are less than 15 nm in diameter. The combustion by-product, NaCl, is efficiently removed from the TiB2 by water washing or vacuum sublimation. Material collected from the low-temperature burner and annealed at 1000 °C consists of loosely agglomerated particles 20 to 100 nm in size. Washed material from the high-temperature flow react

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Cheng, Cheng, and Xiaobing Zhang. "Numerical investigation of two-phase reactive flow with two moving boundaries in a two-stage combustion system." Applied Thermal Engineering 156 (June 2019): 422–31. http://dx.doi.org/10.1016/j.applthermaleng.2019.04.061.

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Biao, Zhou, and Wu Chengkang. "Numerical modeling of 3-D turbulent two-phase flow and coal combustion in a pulverized-coal combustor." Acta Mechanica Sinica 13, no. 3 (1997): 193–202. http://dx.doi.org/10.1007/bf02487701.

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Sattinger, Stanley S., Yedidia Neumeier, Aharon Nabi, Ben T. Zinn, David J. Amos, and Douglas D. Darling. "Sub-Scale Demonstration of the Active Feedback Control of Gas-Turbine Combustion Instabilities." Journal of Engineering for Gas Turbines and Power 122, no. 2 (2000): 262–68. http://dx.doi.org/10.1115/1.483204.

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Described are sub-scale tests that successfully demonstrate active feedback control as a means of suppressing damaging combustion oscillations in natural-gas-fueled, lean-premix combustors. The control approach is to damp the oscillations by suitably modulating an auxiliary flow of fuel injected near the flame. The control system incorporates state observer software that can ascertain the frequency, amplitude, and phase of the dominant modes of combustion oscillation, and a sub-scale fuel flow modulator that responds to frequencies well above 1 kHz. The demonstration was conducted on a test co

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Zhao, Dongsheng, Zhijun Wei, Duanyang He, Li Dalin, and Huang Chujiu. "Effect of different particle sizes on combustion characteristics of DCR engines." Journal of Physics: Conference Series 2746, no. 1 (2024): 012012. http://dx.doi.org/10.1088/1742-6596/2746/1/012012.

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Abstract The ramjet engine has undergone rapid development in recent decades, and the dual combustion chamber ramjet (DCR) engine was proposed in the last century. Boron, with its high volumetric and gravimetric heating values, is one of the most attractive fuel additives for ramjet engines. However, due to the problem of low combustion efficiency, boron is difficult to achieve high efficiency combustion in practical applications. In order to investigate the combustion characteristics of boron-containing gas solid phase components in DCR engines, the Realizable k-ε model, finite rate/vortex di

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Andreas Theodorakakos. "Numerical Study of Different Steady-State Flow Rigs for the Tumble Motion Characterization of a Four-Valve Cylinder Head." CFD Letters 15, no. 9 (2023): 18–31. http://dx.doi.org/10.37934/cfdl.15.9.1831.

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It is widely accepted that in-cylinder airflow structure strongly affects the performance and combustion of internal combustion (IC) engines. In order to enhance turbulence levels at the time of combustion, modern spark ignition engines (SI) usually employ a tumbling motion inside the cylinder. The tumble generated during the intake phase is mainly controlled by the cylinder head, inlet valves and ports configuration. The use of steady-state flow rigs is a common method to characterize the tumble generating ability of a given configuration. The purpose of this study is to perform CFD numerical

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