S2m initialisation file

In case of multi-stage turbomachinery or for radial machines it's preferable to use an extra S2m flow field initialization file instead of the primitive 4-point row-by-row via GMC and the CGNS file. This can be done by setting up a Tecplot formatted ASCII file (refer to the 'Tecplot Data Format Guide'), for example TRACE_S2.input, and assign in the GMC solver configuration 'initialization' the file.

Variables for TRACE S2-data files (rotational geometry)

Variable	Description
CoordinateX	axial coordinate x in [m]
CoordinateR	radius r in [m]
VelocityX	axial velocity component in [m/s]
VelocityThetaAbs	pitchwise velocity component in [m/s] (absolute frame of reference)
VelocityR	spanwise velocity component in [m/s]
Pressure	static pressure in [Pa]
Density	static density in [kg/m3]
Temperature	static temperature in [K]

Note

The file must contain either Density or Temperature.

VelocityThetaAbs used to be called VelocityTheta in previous TRACE versions.

Example

Tecplot formatted header of a S2 data file used for TRACE initialization with 11 streamlines in radial direction consisting of 17 data points in x-direction:

TITLE = "S2m initialisation"
VARIABLES = "CoordinateX" "CoordinateR"
            "VelocityX" "VelocityThetaAbs" "VelocityR"
            "Pressure" "Density"
ZONE T = "S2 data", I = 17, J = 11, DATAPACKING = POINT

Since

9.0