A review of cavity-based trapped vortex, ultra-compact, high-g, inter-turbine combustors

Zhao, Dan; Gutmark, Ephraim; Goey, de Lph Philip

doi:10.1016/j.pecs.2017.12.001

Cited by 234 publications

(44 citation statements)

References 122 publications

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“…41 or the Fluent documentation, which contains more information about the modelling of the governing equations. A more complex turbulence model 42 , e.g. RSM (Reynolds stress model), could have been applied.…”

Section: Discussionmentioning

confidence: 99%

Characterizing hydrogen-fuelled pulsating combustion on thermodynamic properties of a combustor

2019

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Unlike hydrocarbon fuel, hydrogen is 'green' and attracting more and more attentions in energy and propulsion sectors due to the zero emission of CO and CO 2 . By applying numerical simulations, we explore the physics of how a hydrogen-burnt flame can sustain pulsating combustion and its impact on the thermodynamic properties of a standing-wave combustor. We also explain how implementing a heat exchanger can mitigate such pulsating combustion. The dynamic interactions of the unsteady flow-flame-acoustics-heater are examined by varying the mass flow rate ṁ H2 and the heating bands' surface temperature T H . The frequency and amplitude of the pulsating combustion are shown to depend strongly on ṁ H2 . In addition, varying T H is shown to lead to not only the molar fraction of the combustion species being changed but also the flame-sustained pulsating oscillations being mitigated somehow. Finally, nonlinearity is observed and identified in the unsteady flow velocity and the two heat sources.

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Section: Discussionmentioning

confidence: 99%

Characterizing hydrogen-fuelled pulsating combustion on thermodynamic properties of a combustor

2019

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“…In recent years, biomass pellet fuel is being developed rapidly in the EU, North America, and China [11][12][13]. Another advantage of biomass pellet fuel is that it can be used in small boilers, hot blast furnaces, and heating furnaces.…”

Section: Introductionmentioning

confidence: 99%

Effect Analysis on Combustion and Emission Characteristics of a Rotary Burner Fueled by Biomass Pellet Fuel

Gao

Zhang

2020

Journal of Chemistry

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A biomass pellet rotary burner was chosen as the research object, in order to study the influence of excess air coefficient on the combustion phenomenon of biomass rotary burner, the finite element simulation model of a biomass rotary burner was established, and simulation results of a biomass rotary burner were verified by the experiment. The computational fluid dynamics software was applied to simulate the combustion characteristics of biomass rotary burner in a steady-state condition, and the effect of excess air coefficient on temperature field and component concentration field in biomass rotary burner was analyzed. The results show that the flue gas flow rate inside the burner gradually increases with the increase of air velocity, the area with large temperature is mainly concentrated in the middle region of the rotary burner, and the maximum combustion temperature also appeared in the middle region of the combustion chamber, and the formation area of CO decreases with the increase of excess air coefficient. CO2 is mainly concentrated in the middle region of the burner, and the CO2 generating region decreases with the increase of excess air coefficient. The experimental value of the combustion temperature of the biomass rotary burner is in good agreement with the simulation results.

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“…Modeling the flow behavior inside the combustion chamber using different numerical method is an important issue in the physical (aerospace and mechanical engineering) and mathematical (algebra and numerical methods of complex and bluff‐body) [1–28] contexts. Current problem concerns with a steady‐state two‐dimensional reaction between fuel and oxygen that enters from two different parallel locations openings (inlets) through combustion process that was modeled by coupled flow field and mass distribution subjected to the influence of a local discrete vortex.…”

Section: Introductionmentioning

confidence: 99%

Numerical conformal mapping method vs. geometrical separation attitude: Combustion motor chamber internal flow simulation

Nagler

2020

Z Angew Math Mech

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This paper describes the numerical solution of flow analysis in a two‐dimensional combustion chamber with two parallel inlets aided for propellants entrance, addressing a number of different problems that depend on each other: the flow affected by a discrete point in‐cell vortex, the velocity affected by the flow regime in the cell, and the combustion problem affected by the oxygen and fuel entries from the cell walls. The shape geometry of the combustion chamber is made from a square section connected with a semi‐circular one. The mathematical model of the problem consists of an inhomogeneous stream function Laplace equation coupled to partial differential mass conservation equation subjected to a wall non‐intrusion condition and known mass values in the wall openings. Algebraic conformal mapping transformation has been used for modeling the complex cell geometry. The solution was obtained by using the iterative Gauss–Seidel method for both the current function and the mass calculation. Comparison with another modeling method for calibration purpose was performed; considering each geometrical component separately whereas continuous conditions were applied between the two sections. The grid types are: (1) a uniform grid in Cartesian coordinates in the square part, and (2) a uniform circular grid in polar coordinates. It was found that different initial guesses have not effect on the final solution, but an informed initial guess affects the solution time convergence iterations number to solve the problem. Finally, the effect of the mixing vortex on the location of the flame front in the chamber was investigated.

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A review of cavity-based trapped vortex, ultra-compact, high-g, inter-turbine combustors

Cited by 234 publications

References 122 publications

Characterizing hydrogen-fuelled pulsating combustion on thermodynamic properties of a combustor

Characterizing hydrogen-fuelled pulsating combustion on thermodynamic properties of a combustor

Effect Analysis on Combustion and Emission Characteristics of a Rotary Burner Fueled by Biomass Pellet Fuel

Numerical conformal mapping method vs. geometrical separation attitude: Combustion motor chamber internal flow simulation

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