VMFL014

VMFL014
Species Mixing in Co-axial Turbulent Jets

Overview

Reference
R.W. Schefer, R.W. Dibble, “Simultaneous Measurements of Velocity and Density in a Turbulent Non-premixed Flame”. AIAA Journal, Vol 23, pp. 1070-1078, 1985.
R.W., Schefer, “Data Base for a Turbulent, Nonpremixed, Nonreacting Propane-Jet Flow”. http://www.sandia.gov/TNF/DataArch/ProJet.html
SolverAnsys Fluent, Ansys CFX
Physics/ModelsMulti-Species flow, turbulent, jet mixing
Input File
san_jet.cas for Ansys Fluent
VMFL014.def for Ansys CFX
Project FilesLink to Project Files Download Page

Test Case

A propane jet issues into a co-axial stream of air. There is turbulent mixing between the species in the axisymmetric tunnel. Only half of the domain is considered due to axial symmetry.

Figure 31: Flow Domain

Flow Domain

Material PropertiesGeometry Boundary Conditions

Density: Incompressible ideal gas law

Viscosity: 1.72X10–5 kg/m-s

Tunnel length = 2 m

Tunnel diameter = 0.3 m

Propane jet tube:

Inner diameter = 5.2 mm

Outer diameter = 11 mm

Inlet velocity of air = 9.2 m/s

Inlet velocity of Propane – Specified as fully developed profile

Inlet temperature (both streams) = 300 K

Temperature at the wall = 300 K

Analysis Assumptions and Modeling Notes

The flow is steady. Species mixing is modeled with the three species; propane, oxygen, and nitrogen. There is no reaction.

Results Comparison for Ansys Fluent

Figure 32: Comparison of Distribution of Propane Along Axis of the Jets

Comparison of Distribution of Propane Along Axis of the Jets

Figure 33: Comparison of Distribution of X-Velocity Along Axis of the Jets

Comparison of Distribution of X-Velocity Along Axis of the Jets

Results Comparison for CFX

Figure 34: Comparison of Distribution of Propane Along Axis of the Jets

Comparison of Distribution of Propane Along Axis of the Jets

Figure 35: Comparison of Distribution of X-Velocity Along Axis of the Jets

Comparison of Distribution of X-Velocity Along Axis of the Jets