Combustor

A combustor comprising:

• a first pipe through the interior of which combustion gas flows and which emits the combustion gas via apertures within a flame-quenching distance;
• a second pipe to which the combustion gas that is emitted from the apertures of the first pipe is supplied, and within which a combustion region is formed that burns the combustion gas supplied from an upstream side, and that circulates burned gas to a downstream side;
• and
• an ignition apparatus which ignites combustion gas supplied to the second pipe using a flame kernel that is formed by a flame kernel formation unit;
• wherein the first pipe is an inner pipe which has the combustion gas supplied from one end, while the other end is a blocked end;
• the second pipe is an outer pipe which is disposed around an outer circumference of the first pipe with interposition of the combustion region, and which discharges the combustion gas from one end, while the other end is a blocked end that is disposed at the other end side of the first pipe;
• and
• the flame kernel formation unit is disposed on the upstream side of the combustion region within the second pipe, between the blocked end of the first pipe and the blocked end of the second pipe.