Effect of coaxial injector parameters on LOX/methane engines: A numerical analysis

Xu, Jiabao; Jin, Pengfei; Li, Ruizhi; Wang, Jue; Cai, Guobiao

doi:10.1016/j.actaastro.2020.02.055

Cited by 23 publications

(9 citation statements)

References 41 publications

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“…Using ANSYS FLUENT software in this simulation, the standard k − ε (SKE) turbulence model is applied to solve the turbulent flow with the source phase of the gas-liquid interaction considering the coupling between the gas and the liquid [10]. Using the simplified mechanism of methane combustion including 13 components and 18 steps, the eddy dissipation concept (EDC) model is combined with a density-based coupling algorithm to simulate the reaction [29].…”

Section: Governing Equations and Numericalmentioning

confidence: 99%

“…For better efficiency, the calculation for heat transfer in the thrust chamber with regenerative cooling is divided into two regions: the combustion chamber and the cooling channel. The coupled heat transfer model and the combustion instability evaluation model in our previous study [10] are adopted in this paper to calculate the coupling heat transfer and evaluate the combustion instability. A manually iterative procedure is used to couple the two regions, and the iteration procedure is specified in Figure 1.…”

Section: Governing Equations and Numericalmentioning

confidence: 99%

“…As a propellant for rocket engine, methane has many advantages such as low carbon deposition, low cost, high specific impulse, and environmental protection [4][5][6][7]. Because of the importance in liquid rocket engine, many experimental and numerical researches have been done on injectors in recent years [8][9][10]. The shear coaxial injector combines simple structure with high reliability, while the swirl coaxial injector has better droplet mixing and atomization ability, and they are suitable for gas-liquid injector and liquid-liquid injector in rocket engine [2,11].…”

Section: Introductionmentioning

confidence: 99%

“…In the previous work [10], we studied the influence of injector structure parameters on combustion performance with constant methane injection temperature. In this paper, however, a new three-dimensional numerical model is provided to study the effect of the main fluid parameters on combustion performance and atomization performance.…”

Section: Introductionmentioning

confidence: 99%

“…This paper analyzes the influence of the main fluid parameters on combustion efficiency, heat flux, combustion stability, and atomization of a LOX/methane engine with different methane injection temperatures and different injector parameters. And the design criteria of the injector structure parameter in our previous work [10] are analyzed with different methane injection temperature conditions to extend their applicable scope. This paper is organized as follows: in Section 2, the method, setup, and validation of the model are presented; Section 3 analyzes the effect of different fluid parameters on combustion performance and atomization performance; eventually, Section 4 summarizes the conclusions.…”

Section: Introductionmentioning

confidence: 99%

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Numerical Study on Combustion and Atomization Characteristics of Coaxial Injectors for LOX/Methane Engine

Jin

et al. 2021

International Journal of Aerospace Engineering

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The LOX/methane engine has an admirable performance under a supercritical state. However, the properties of methane change drastically with varying injection temperature. Because the injector can greatly affect the atomization and combustion, this study performed a three-dimensional numerical simulation of atomization, combustion, and heat transfer in a subscale LOX/methane engine to evaluate the effect of the main fluid parameters with different methane injection temperatures and different injectors on atomization performance and combustion performance. The results show that the larger propellant momentum ratio and Weber number can improve the heat flux and combustion stability in shear coaxial injector, while the influence in swirl coaxial injector is relatively small. Moreover, in shear coaxial injector and in swirl coaxial injector, the larger propellant momentum ratio and Weber number can reduce the droplet size, enhance atomization performance, and improve the combustion efficiency. The numerical model provides an economical method to evaluate the main fluid parameters and proposes new design principles of injectors in LOX/methane engine.

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Section: Governing Equations and Numericalmentioning

confidence: 99%

Section: Governing Equations and Numericalmentioning

confidence: 99%