Unit system

The UnitSystem flag is used to determine the labeling of all dimensional quantities printed in output files. No unit conversion is ever performed, the flag only controls the labeling of quantities. The process control parameters data section defines the parameter UnitSystem, which can take one of the following three values.

  1. if UnitSystem = SI, the international system of units will be used; the basic units length, time and mass are m, sec and kg, respectively.
  2. if UnitSystem = US, the U.S. customary system of units will be used; the basic units length, time and force are ft, sec and lbs, respectively.
  3. if UnitSystem = USIN, the U.S. customary system of units will be used; the basic units length, time and force are in, sec and lbs, respectively.

(Default value: UnitSystem = SI).

Example

Assume the radius of a rotor was defined in the input file with the following declaration: @ROTOR_RADIUS {25}. Note that this input string does not define the units of the rotor radius.

  1. If UnitSystem = SI, the output file will read: Rotor radius = 25 [m].
  2. If UnitSystem = US, the output file will read: Rotor radius = 25 [ft]
  3. If UnitSystem = USIN, the output file will read: Rotor radius = 25 [in].