Burner, gas turbine having such a burner, and fuel nozzle

US10125993B2 · kind B2 · utility

Assignee

• Siemens Aktiengesellschaft · DE

Inventors

• Christian Beck · Oebisfelde, DE
• Stefan Dederichs · Mülheim an der Ruhr, DE
• Olga Deiss · Mülheim an der Ruhr, DE
• Berthold Köstlin · Duisburg, DE

Key dates

• Filing date: Mar 20, 2015
• Grant date: Nov 13, 2018
• Expiry date: Mar 20, 2035

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F23R2900/00002
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

A burner having a plurality of pre-mixing chambers each having a fuel nozzle for two fuels, the fuel nozzle has a fuel lance extending in a flow direction, in which fuel lance first outlet openings for a first fuel are introduced. The fuel lance is surrounded by an outer pipe having at least one second outlet opening for a second fuel, the first outlet openings oriented radially and the second outlet opening oriented axially, a flow cross-section is formed between the fuel lance and the inside of the pre-mixing chamber and vortex generators are arranged on the fuel lance. At least one vortex generator is arranged upstream of the first outlet openings and downstream of the second outlet opening. The distance of the first outlet openings from an end of the pre-mixing chamber is at least three times as large as a cross-section of the pre-mixing chamber.