Modeling of gas turbine fuel nozzles
Abstract
A fuel injection model approach that addresses airflow dynamics, atomization, and spray dynamics is developed. The airflow field of a production air-blast atomizer is evaluated and compared with laser anemometer measurements. The injection model considers fuel filming and breakup processes in addition to secondary atomization. The model is validated against the spray measurements of the nozzle. The spray dispersion and evaporation is modeled using a recently developed turbulent two-phase flow model. The predictions are compared with reported Phase/Doppler measurements for drop-size as well as axial and radial velocity components within the spray produced by a pressure atomizer. It is concluded that the present approach yields encouraging results, and may serve as a sound basis for the accurate representation of the various fuel injection processes, and the development of a design procedure for internal passages of fuel injectors.
- Publication:
-
IN: Calculations of turbulent reactive flows; Proceedings of the Winter Annual Meeting
- Pub Date:
- 1986
- Bibcode:
- 1986ctrf.proc...91R
- Keywords:
-
- Air Flow;
- Atomizing;
- Fuel Injection;
- Fuel Sprays;
- Gas Turbines;
- Nozzle Flow;
- Flow Distribution;
- Radial Flow;
- Radial Velocity;
- Turbulent Flow;
- Two Phase Flow;
- Fluid Mechanics and Heat Transfer