RANS simulations of cold jet flows from a serrated nozzle

Authors: A. Cimpoeru (CFMS), J. Appa (Zenotech) and D. Standingford (Zenotech)

February 2015

Abstract

Geometry and Mesh Generation (SMC-006 Nozzle)

alternate text

SMC006 chevron type nozzle. Left (Model) and Right (Domain Topology ) (Xia et. al. (2009))

alternate text

SMC006 mesh on x-y plane. Multiblock Stuctured Mesh (19M cells) (Xia H. and Tucker P. (2009))

Initial Conditions (Steady-State RANS)

Ambient Conditions

Variable Value Unit
P_amb 97000 Pa
T_amb 280.2 K
Rho_amb 1.225 Kg/\(m^3\)
mu 1.79e-5 Pa.s
speed_of_sound 335.549 m/s
gas_constant 287.0 KJ/KgK

Jet Conditions

Variable Value  
NPR 1.83 Nozzle Pressure Ratio
TPR 1.022 Nozzle Temperature Ratio
Mjet 0.9 Jet Mach number
Ujet 300 Reference Velocity [m/s]
Reynolds 1.03e06 Reynolds Number (See Note)

Results

alternate text

Jet velocity profiles in the Tip-to-Tip plane at different stations

alternate text

Jet velocity profiles in the Notch plane at different stations

alternate text

Comparison between LES study of Xia et. al. (2009) (top) and present RANS study (bottom) at different stations

alternate text

Isosurfaces of Q criterion (present study)

  • Note

The Reynolds number is based on the jet diameter and reference velocity

See also

‘Hao Xia, Paul G. Tucker and Simon Eastwood (2009). Large-eddy simulations of chevron jet flows with noise predictions. International Journal of Heat and Fluid Flow 30 (2009) 1067-1079.’_

‘Hao Xia and Paul G. Tucker (2011). Numerical Simulation of a Single-Stream Jets from a Serrated Nozzle . Flow Turbulence Combust 2011.’_

Serrated Nozzle Notebook