Numerical study of the impact and aggregation characteristics of alumina droplets on a wall in the solid rocket motor

Article Engineering, Aerospace

Experimental study on the rebound characteristics of high temperature alumina droplets impacting on an inclined cold wall

Gen Zhu et al.

Summary: This study investigates the impact characteristics of high-temperature alumina droplets on an inclined cold wall, revealing that droplet size and impact angle significantly influence the droplet's rebound morphology.

ACTA ASTRONAUTICA (2022)

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Article Engineering, Aerospace

Experimental and numerical study on slag deposition in solid rocket motor

Junlong Wang et al.

Summary: The accumulation of slag in solid rocket motors has a significant impact on engine safety. This study investigates the characteristics and influencing factors of slag deposition through experiments and numerical simulation. A deposition prediction model is developed to explore the effects of burning surface regression, particle size, detaching position, and nozzle structure. The results indicate that these parameters play a crucial role in slag accumulation.

AEROSPACE SCIENCE AND TECHNOLOGY (2022)

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Article Engineering, Aerospace

Numerical investigation on regression rate and thrust regulation behaviors of a combined solid rocket motor with aluminum-based fuel

Xiangrui Zou et al.

Summary: The study aims to determine the behaviors of regression rate and thrust regulation of a combined solid rocket motor capable of achieving energy management. A numerical model was developed to capture the combustion process and regression rate, showing relatively high combustion efficiency. Parametric study indicates that increasing oxidizer mass flow rate leads to higher regression rates and surface temperature of solid grain, while increasing inner diameter of grain hole results in reductions of these parameters.

AEROSPACE SCIENCE AND TECHNOLOGY (2021)

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Article Engineering, Aerospace

Application of immersed boundary method to the simulation of transient flow in solid rocket motors

Qingyu Lin et al.

Summary: An immersed boundary method (IBM) is developed for simulating the coupling of gas flow and burning surface regression in solid rocket motors (SRM) to avoid re-meshing. The proposed coupling method shows second-order accuracy in space and leads to low-frequency pressure fluctuations within 0.2% of the mean value during burning surface regression. The accuracy of the results is verified by comparisons with other methods or experiments in literature.

AEROSPACE SCIENCE AND TECHNOLOGY (2021)

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Article Engineering, Aerospace

Experimental techniques for characterization of particles in plumes of sub-scale solid rocket motors

Stefania Carlotti et al.

Summary: An innovative collection methodology using a supersonic probe was used to collect alumina particulate from the exhaust plume of a sub-scale solid propellant rocket motor and compared with quench collection bomb analysis. Various analytical methods were employed to determine particle characteristics, revealing that particle size significantly decreased across the rocket nozzle.

ACTA ASTRONAUTICA (2021)

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Article Chemistry, Physical

Dynamic behaviors of two droplets impacting an inclined superhydrophobic substrate

Shu-Rong Gao et al.

Summary: The study investigates the dynamic behaviors of two droplets impacting an inclined superhydrophobic substrate and identifies three rebound patterns. The inclination angle has opposite effects on the rebound dynamics, impacting the contact time of the droplets significantly. The position of the droplets and the inclination angle play a crucial role in determining the rebound patterns and contact time.

COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS (2021)

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Article Chemistry, Physical