Suitability of Detached Eddy Simulation in Overflow for Predicting Environments near Supersonic Jets

摘要

This study was done to determine suitability of the detached eddy simulation (DES) model in OVERFLOW for numerical simulations of supersonic jet plumes. First, the DES model as implemented in OVERFLOW was tested by simulating the canonical case of a super-critical cylinder in crossflow. The DES model matched experimental data better than traditional unsteady Reynolds averaged Navier Stokes (URANS) models for this case. The DES model was also used to simulate a Mach 2.2 perfectly expanded jet. The mean flow field for this case matched experimental data at least as well as a RANS model. Acoustic waves caused by turbulent fluctuations in the jet were observed, and quantitative investigation of the acoustic field of similar jets is planned. Finally, a Mach 2 jet was simulated at various temperature ratios. This case includes a solid body in the near field of the jet which experiences surface pressure fluctuations. The trends predicted by this model are in reasonable agreement with published experimental data.