| Autor: |
William A. Rogers, Douglas L. Straub, Edward H. Robey, M. J. Yip, A. Richards |
| Rok vydání: |
1998 |
| Předmět: |
|
| Zdroj: |
34th AIAA/ASME/SAE/ASEE Joint Propulsion Conference and Exhibit. |
| DOI: |
10.2514/6.1998-3909 |
| Popis: |
Combustion dynamics have emerged as a significant consideration in the design of low emission gas turbine combustors, particularly for stationary power generators. To date, the effect of fuel injection design on combustion dynamics is not well documented. Previous work has shown that the axial location of the fuel port plays an important role in controlling dynamic combustion instabilities. Results in this paper show that in addition to the axial position of the fuel port, the axial swirl vane location is also an important parameter for controlling combustion dynamics. The results in this paper are collected from a can-style combustor designed specifically to study combustion dynamics. The operating pressure and inlet air temperature are fixed at 7.5 atmospheres and 588°K (600°F), respectively. Tests are conducted with natural gas at a nominal heat input of IMWth (3MBTUH). The equivalence ratio and nozzle reference velocity are varied over a range typical for lean premixed gas turbine combustors. A modular premix nozzle is used to study the effects of various geometric parameters on combustion dynamics. Numeric modeling shows that the swirl vane position may change the phase relation between pressure and heat release rate by modifying temporal and spatial variations in the premixer fuel-air distribution. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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