The actuator disk input file is an ASCII file. Comment lines must begin with the pound symbol (#). A single file may control one or more disks. In the latter case, the data of each disk is listed sequentially.
Example 14.1: Disk Data File, for Two Counter-Rotating Disks Located at (0,±1,0)
This is an example of the disk data file, for two counter-rotating disks located at (0,±1,0):
# Actuator disk input file for FENSAP # ––––––––––––––––––––––––––– # # FORMAT: # Number of disks # # For each disk: # ––––––––––– # Disk index number (6x, x=0-9) # Coordinates of the origin of the disk # Position of the 12 o'clock mark # Components of the thrust line (downwash direction) # Components of the angular velocity vector (Magnitude → rpm) # (right-hand rule) # # Number of angular locations, Number of radial locations # Angular position (deg) # Radial distribution (r, Load, DelTtot, omega) # 2 6001 0.000000d+00 0.100000d+01 0.000000d+00 0.000000d+01 0.100000d+01 0.450000d+00 0.100000d+01 0.000000d+00 0.000000d+00 –.120000d+04 0.000000d+00 0.000000d+00 3 7 0.00000000E+00 0.00000000E+00 0.00000000E+00 0.00000000E+00 0.12256671E+03 0.13503750E+00 0.32606623E+03 0.35200000E+00 0.12256671E+03 0.23631563E+00 0.72623842E+03 0.78400000E+00 0.12256671E+03 0.32071406E+00 0.91960866E+03 0.99275000E+00 0.12256671E+03 0.35447344E+00 0.90548221E+03 0.97750000E+00 0.12256671E+03 0.39385938E+00 0.69474339E+03 0.75000000E+00 0.12256671E+03 0.45000000E+00 0.00000000E+00 0.00000000E+00 0.12256671E+03 0.12000000E+03 0.00000000E+00 0.00000000E+00 0.00000000E+00 0.12256671E+03 0.13503750E+00 0.32606623E+03 0.35200000E+00 0.12256671E+03 0.23631563E+00 0.72623842E+03 0.78400000E+00 0.12256671E+03 0.32071406E+00 0.91960866E+03 0.99275000E+00 0.12256671E+03 0.35447344E+00 0.90548221E+03 0.97750000E+00 0.12256671E+03 0.39385938E+00 0.69474339E+03 0.75000000E+00 0.12256671E+03 0.45000000E+00 0.00000000E+00 0.00000000E+00 0.12256671E+03 0.24000000E+03 0.00000000E+00 0.00000000E+00 0.00000000E+00 0.12256671E+03 0.13503750E+00 0.32606623E+03 0.35200000E+00 0.12256671E+03 0.23631563E+00 0.72623842E+03 0.78400000E+00 0.12256671E+03 0.32071406E+00 0.91960866E+03 0.99275000E+00 0.12256671E+03 0.35447344E+00 0.90548221E+03 0.97750000E+00 0.12256671E+03 0.39385938E+00 0.69474339E+03 0.75000000E+00 0.12256671E+03 0.45000000E+00 0.00000000E+00 0.00000000E+00 0.12256671E+03 6002 0.000000d+00 –.100000d+01 0.000000d+00 0.000000d+01 –.100000d+01 0.450000d+00 0.100000d+01 0.000000d+00 0.000000d+00 0.120000d+04 0.000000d+00 0.000000d+00 3 7 0.00000000E+00 0.00000000E+00 0.00000000E+00 0.00000000E+00 0.12256671E+03 0.13503750E+00 0.32606623E+03 0.35200000E+00 0.12256671E+03 0.23631563E+00 0.72623842E+03 0.78400000E+00 0.12256671E+03 0.32071406E+00 0.91960866E+03 0.99275000E+00 0.12256671E+03 0.35447344E+00 0.90548221E+03 0.97750000E+00 0.12256671E+03 0.39385938E+00 0.69474339E+03 0.75000000E+00 0.12256671E+03 0.45000000E+00 0.00000000E+00 0.00000000E+00 0.12256671E+03 0.12000000E+03 0.00000000E+00 0.00000000E+00 0.00000000E+00 0.12256671E+03 0.13503750E+00 0.32606623E+03 0.35200000E+00 0.12256671E+03 0.23631563E+00 0.72623842E+03 0.78400000E+00 0.12256671E+03 0.32071406E+00 0.91960866E+03 0.99275000E+00 0.12256671E+03 0.35447344E+00 0.90548221E+03 0.97750000E+00 0.12256671E+03 0.39385938E+00 0.69474339E+03 0.75000000E+00 0.12256671E+03 0.45000000E+00 0.00000000E+00 0.00000000E+00 0.12256671E+03 0.24000000E+03 0.00000000E+00 0.00000000E+00 0.00000000E+00 0.12256671E+03 0.13503750E+00 0.32606623E+03 0.35200000E+00 0.12256671E+03 0.23631563E+00 0.72623842E+03 0.78400000E+00 0.12256671E+03 0.32071406E+00 0.91960866E+03 0.99275000E+00 0.12256671E+03 0.35447344E+00 0.90548221E+03 0.97750000E+00 0.12256671E+03 0.39385938E+00 0.69474339E+03 0.75000000E+00 0.12256671E+03 0.45000000E+00 0.00000000E+00 0.00000000E+00 0.12256671E+03
The first line indicates how many disks will be specified.
The second line specifies the surface index of the first disk. Valid numbers are 6,000 to 6,999. The old two-digit index format, 60 to 69, is still supported for backward compatibility.
The third line specifies the coordinates of the center of the disk.
The fourth line specifies the position of the 12 o'clock mark on the rim of the disk, which is the reference point for the angles of the radial distributions that define the properties of the disk.
The fifth line contains the direction cosines of the thrust line (non-dimensional).
The sixth line specifies the direction cosines of the rotational velocity: their vector sum is the rotational velocity in rpm. In the example, a rotational velocity of 1,200 rpm is specified.
The seventh line indicates how many radial distributions (NR) are used to specify the properties of the disk, and how many data points are located on each line.
The next group of lines is repeated NR times, you must indicate the radial position of the line as an angle from the 12 o'clock mark (θ in the direction of rotation; the orientation follows the right-hand rule with respect to the direction of the thrust line), followed by the radial position (m), disk loading (Pa), total temperature (K) jump across the disk and swirl velocity (rad/sec) at that radial location, for each of the Np points on the line.
Note: Swirl velocity is not necessarily equal to the velocity of rotation of the component.
The disk loading is the local force per unit area, and has the units of pressure, while the total temperature jump has the units of temperature.
Note: The rotational velocity vector 
follows the right-hand rule. Note that the swirl velocity is not
imposed as a Dirichlet boundary condition.
You must not specify the 360° radial line since it is identical to the 0° line.
You must ensure that the disk loading, integrated over the surface of the actuator
disk, produces the desired thrust. Similarly, the total enthalpy jump
(
) integrated over the disk surface must yield the work done.