| 摘要 |
Embodiments of the present invention employ a closed loop controls philosophy that actively determines the air-to-fuel ratio of turbomachine throughout the start-up process. This closed loop controls philosophy provides many benefits. This philosophy performs the ignition process while the turbomachine is operating at a purge speed and eliminates the associated coast down period. Reduces or eliminates the warm-up timer. The philosophy may also increase the acceleration rate of the turbomachine to the primary operating speed. These benefits may reduce the overall start-up time of the turbomachine. Furthermore, by actively controlling the air-to-fuel ratios during the start-up processes, the turbomachine may be operated on a nearly optimal and repeatable schedule. These benefits may reduce thermal transients, possibly extending parts life; reduce variations in start-up times, and possibly increasing combustor margin.
|
