| 摘要 |
PROBLEM TO BE SOLVED: To provide a fuel nozzle capable of properly burning fuel by determining a distribution of concentration of the fuel suitable for differential pressure of the fuel.SOLUTION: A fuel nozzle for injecting fuel into a burner cylinder in which a premixed gas prepared by mixing the fuel and combustion air in advance, is circulated, includes a fuel passage L for circulating the fuel, a low-pressure injection hole 71a communicated with the fuel passage L for injecting the fuel, a high-pressure injection hole 71b communicated with the fuel passage L for injecting the fuel, and an injection switching mechanism 75 capable of switching the injection of the fuel from the high-pressure injection hole 71b according to a fuel pressure in the fuel passage L. The injection switching mechanism 75 injects the fuel from the low-pressure injection hole 71a without injecting the fuel from the high-pressure injection hole 71b when the fuel pressure in the fuel passage L is low, and injects the fuel from at least the high-pressure injection hole 71b when the fuel pressure in the fuel passage L is high. |
