Combustion chamber premixing nozzle for hydrogen fuel gas turbine

The invention provides a combustion chamber premixing nozzle for a hydrogen fuel gas turbine. The combustion chamber premixing nozzle comprises a gas film development channel, a fuel and air rapid mixing guide pipe and a detachable nozzle lip edge. The fuel and air rapid mixing guide pipe is located in the center of the air film development channel, is of a hollow annular structure and is connected with the air film development channel through a fuel channel. When entering the air film development channel from the bottom of the nozzle, external air is divided into two parts, one part enters the fuel and air rapid mixing guide pipe and then is rapidly mixed with fuel flowing through the fuel channel; and the other part continues to develop along the flow direction and finally forms a gas film near the outlet of the nozzle, so that tempering is prevented, a reaction area is lifted, and the safety and durability of the nozzle are improved. According to the detachable nozzle lip, the size of a local reaction area