PROBLEM TO BE SOLVED: To provide a system including a multitubular fuel nozzle.SOLUTION: A multitubular fuel nozzle includes a plurality of fuel injectors. Each fuel injector is configured to extend into a premixing tube of each of a plurality of mixing tubes. Each fuel injector comprises a body, a fuel passage and a plurality of fuel ports. The fuel passage is disposed in the body and extends in a longitudinal direction in a part of the body. The plurality of fuel ports are disposed along the part of the body and connected to the fuel passage. A space is arranged between the part of the body with the plurality of fuel ports and each premixing tube.
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