5.7.2 Scaling an existing combustor design and non-dimensional performance
The combustor is the least amenable of all gas turbine components to scaling. Should this be
attempted then for the same inlet temperature, inlet pressure, and temperature rise the
following applies:
1. Flow change is proportional to the linear scale factor squared.
2. Fuel air ratio is unchanged.
3. Air and gas velocities are unchanged.
4. Percentage pressure loss is unchanged.
5. Combustor loading and combustor intensity are inversely proportional to the scale factor,
whereas residence time is directly proportional to it. (Loading, intensity and residence time
are defined in sections 5.7.3 and 5.7.6 respectively.)