Numerical Simulation of the Spray Characteristics in Small Scale Liquid Rocket Engine Combustion Chamber

Abstract:

The mathematical and physical model of the liquid propellant spray in straight nozzle was proposed for studying the performance characteristics of the small-scale liquid rocket engine. With the Fluent software, the numerical simulation was carried out. Sauter mean diameter (SMD) of the HAN-based liquid propellant (LP1846) in the engine combustor changing with spray pressure, nozzle diameter and the liquid surface tension were analyzed. The results indicate that: in the spray pressure region of 1.8MPa~3.0MPa, at a fixed spray pressure, the smaller is the nozzle diameter, the smaller is the droplets’ SMD and the relationship between the SMD and the nozzle diameter is approximately linearity; for the same nozzle diameter and spray pressure, the larger is the surface tension, the larger is the liquid droplets’ SMD.

• Periodical: Advanced Materials Research (Volumes 383-390)
• Pages: 7729-7733
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.383-390.7729
• Online since: November 2011
• Authors: Na Zhao, Yong Gang Yu, Yu Qiang Wang
• Keywords: Atomization, Liquid Propellant, Liquid Rocket Engine, Numerical Simulation, SMD

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