Combustion characteristics and turbulence modeling of swirling reacting flow in solid fuel ramjet

Musa, Omer; Chen, Xiong; Zhou, Changsheng

doi:10.1016/j.actaastro.2017.06.023

Cited by 25 publications

(6 citation statements)

References 118 publications

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“…Rotating flow can be found in nature, such as ocean whirlpool [1], tropical cyclones and tornadoes [2] as well as in many engineering applications such as heat transfer [3], combustion [4], phase separation and mixing [5], [6]. In the case of gas-liquid flow, a static swirl element can be used inside a pipe to generate the rotating flow responsible either for mixing or separating the gas and liquid phases [6], [7].…”

Section: Introductionmentioning

confidence: 99%

Numerical simulation of the gas-liquid flow inside a horizontal static mixer

Putra

Nugroho

2020

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The gas-liquid flow inside a horizontal static mixer was numerically investigated by using Euler-Euler Computational Fluid Dynamics (CFD) simulations. The results confirm that the liquid superficial velocity plays a significant role on the mixing behavior of the gas and liquid. The mixing behavior in this present study at a liquid superficial velocity of 0.2 m/s was the worst both axially and radially. Increasing the liquid superficial velocity significantly improve the mixing between gas and liquid. However, the unwanted gas layer still can be found at the superficial liquid velocity less than 0.8 m/s. A good mixing behavior in this study was achieved at a relatively high velocity (i.e. larger than 0.8 m/s).

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Section: Introductionmentioning

confidence: 99%

Numerical simulation of the gas-liquid flow inside a horizontal static mixer

Putra

Nugroho

2020

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“…Pein and Vinnemeier 24 also investigated the inlet swirl effects on the specific thrust of the solid fuel ramjet containing metalized fuel and demonstrated that the swirling flow provides better mixing and combustion for the metal particles and so increases the combustion efficiency. Recently, Musa et al 25, 26 conducted some experimental studies and proposed an empirical correlation for the regression rate versus the inlet swirl number, which shows almost linear behavior.…”

Section: Introductionmentioning

confidence: 99%

Burning rate augmentation in solid fuel ramjets by swirling inlet air stream

Tahsini

2021

Proceedings of the Institution of Mechanical Engineers, Part G:

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The influence of the inlet swirling flow on the regression rate of the fuel in the combustion chamber of the solid fuel ramjet is investigated in this study using numerical simulations. The finite-volume solver of the compressible turbulent reacting flow is developed to study the flow field where the burning rate is computed using the conjugate heat transfer method for the solid fuel. The correlation is found for the maximum regression rate versus an imposed inlet swirl when the linear distribution of the circumferential velocity is applied at the inlet stream. Although the regression rate augmentation is considerable due to the swirling flow field in the combustor, it is shown that the swirl is effective if is applied near the shear layer of the backstep flow in the combustor. The modified swirler with short blades is suggested to be used in solid fuel ramjets to increase the regression rate of the fuel and improve the performance, but with lower pressure loss.

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“…However, due to the lack of a fuel supply system, the solid fuel production rate (regression rate) could not be controlled actively like gaseous and liquid fuels. A previous study [2] suggested that the regression rate was sensitive to the geometries [3][4][5], flight conditions [6], and the fuel types [7][8][9]. The thermodynamic performance of SFRJ, scramjet, and hybrid rockets were extensively investigated and reported in the literature [10][11][12][13][14][15][16][17][18][19][20].…”

Section: Introductionmentioning

confidence: 99%

Numerical Investigation of Inlet Thermodynamic Conditions on Solid Fuel Ramjet Performances

Zhao

Chen

et al. 2021

International Journal of Aerospace Engineering

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In this work, 2D numerical RANS (Reynolds Average Navier-Stokes) simulations were carried out to investigate the thermodynamic performance of a solid fuel ramjet (SFRJ) with different inlet conditions. This is achieved by using an in-house FORTRAN code to simulate a 2D turbulent, reacting, unsteady flow in the ramjet engine. The inlet conditions are characterized by three key parameters: (1) swirl number ( S N ), (2) mass flow rate ( m ̇ air ), and (3) inlet temperature ( T in ). With the code numerically validated by benchmarking with a number of computed cases, it is applied to perform systematic studies on the turbulent flow recirculation, combustion, and heat transfer characteristics. It is found that increasing S N , m ̇ air , or T in can dramatically enhance the combustion heat release rate, regression rate, and combustor average temperature. Furthermore, the analysis on the chemical reaction intermediate (CO) reveals that the chemical reaction is more sufficient with increased m ̇ air , but S N = 0 . In addition, a secondary vortex is generated at the corner of the backward facing step in the presence of a swirl flow resulting from the instability of the shear layer. Finally, the nonlinear correlations between the heat transfer, combustion characteristics, and flow field characteristics and the corresponding inlet thermodynamic parameters are identified.

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Combustion characteristics and turbulence modeling of swirling reacting flow in solid fuel ramjet

Cited by 25 publications

References 118 publications

Numerical simulation of the gas-liquid flow inside a horizontal static mixer

Numerical simulation of the gas-liquid flow inside a horizontal static mixer

Burning rate augmentation in solid fuel ramjets by swirling inlet air stream

Numerical Investigation of Inlet Thermodynamic Conditions on Solid Fuel Ramjet Performances

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