ContribDieselFoamInjectorPropertiesMultiHoleInjectorAngleSpacing
From OpenFOAMWiki
The spacing between the holes. Each value defines the angle to the next hole in a counter-clockwise direction around the injector direction. The position of the 'first' hole is defined by the angle to the reference plane/axis.
This plane is defined by the injector direction and the vector in the xy-plane, i.e xyAngle.
Below is and example of an injector with 4 sprays.