Numerical Simulation of the Interaction of Two Parallel Jets with an Opposing Supersonic Free Stream
Authors: Kondrashev D.O., Lutsenko A.Yu.
Published in issue: #10(178)/2026
Category: Aviation and Rocket-Space Engineering | Chapter: Aerodynamics and Heat Transfer Processes in Aircrafts
The influence of the relative distance between nozzles on the flow structure, the formation of shock waves, and mixing zones is investigated. The simulation was performed in the FlowVision software using the SST turbulence model. Validation of the mathematical model was carried out on the basis of experimental data and empirical dependencies for a single jet, which confirmed the correctness of the approach. It is shown that with a decrease in the distance between the jets, their intense interaction occurs with the formation of a single bow shock and a complex wave structure, including a Mach disk in the region of shock intersection. With an increase in the distance, the jets develop almost independently. A comparison of the distribution of the normalized pressure coefficient near the engine nozzle with experimental data is carried out, demonstrating good agreement. The obtained results can be used in the design of multi-nozzle braking propulsion systems for reusable launch vehicle stages, as well as for optimizing the arrangement of nozzles in order to increase the efficiency of braking and controllability of aircraft at the stages of descent and landing.
EDN TSOXCJ
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