Computational studies of lobed forced mixer flows

Abstract

Full Navier Stokes Analyses have been conducted for the flows behind the trailing edge of a lobed forced mixer. The governing equations are derived from the time-dependent compressible Navier-Stokes equations and discretized in the finite-difference form. A simple two-layer eddy viscosity model has also been used to account for the turbulence. Computed results are compared with some of the velocity measurements using a laser-Doppler anemometer (Yu and Yip (1997)). In general, good agreement can be obtained in the streamwise mean velocity distribution but the decay of the streamwise circulation is underpredicted. Some suggestions to the discrepancy are proposed.

Numerical Simulation of Free Cross-Shaped Jet

“…Reynolds-Averaged Navier-Stokes (RANS) equation solvers were used routinely for the analysis of aeronautic and aerospace systems. Passive controlled engine exhaust nozzles were numerically analyzed at high exit Reynolds number in terms of their performance quantities and noise reduction [10][11][12][13][14][15]. RANS models replace all turbulent fluid dynamic effects with a turbulence model.…”