Gas turbines are commonly used in energy sectors, primarily relying on fossil fuels, which produce significant NOx and CO2 emissions, contributing to environmental pollution. Hydrogen has emerged as a clean alternative. However, its high reactivity compared to natural gas poses challenges such as self-ignition and flashback in premixed combustion chambers. To address this, jet stabilization mechanisms have been proposed. This study numerically analyzes injector designs for jet stabilization in hydrogen combustion. Using a 2-D structured mesh with SST k-ω turbulence and species transport models, we evaluate how fuel and air inlet diameters and velocities influence flame stabilization and NOx emissions. The findings offer guidance for designing injectors that achieve stable combustion and reduced emissions, supporting hydrogen as a clean energy source for gas turbines.