Nozzle structure for hydrogen gas burner apparatus

A nozzle structure for a hydrogen gas burner apparatus, comprising an outer pipe, an inner pipe disposed concentrically with the outer pipe, and a stabilizer configured to throttle a space between the outer pipe and the inner pipe, wherein

• the inner pipe comprises an inner pipe end part with an axial opening hole and a circumferential opening hole formed therein, the axial opening hole penetrating in an axial direction of the inner pipe, the circumferential opening hole penetrating in a radial direction of the inner pipe,
• a hydrogen gas flows through the inner pipe,
• the circumferential opening hole lets the hydrogen gas flow out from the inner pipe in the radial direction of the inner pipe,
• the axial opening hole lets hydrogen gas flow out from the inner pipe in the axial direction of the inner pipe,
• an oxygen-containing gas flows between the outer pipe and the stabilizer,
• a ratio S2/S1 between a cross-sectional area S1 of the axial opening hole and a cross-sectional area S2 of the circumferential opening hole is equal to or lower than 50%, and
• a ratio S3/S4 between a cross-sectional area S4 of a space between the inner pipe and the outer pipe and a cross-sectional area S3 of a space between an outer edge of the stabilizer and the outer pipe is equal to or lower than 45%.