Evaluation of NASA Lean Premixed Hydrogen Burner

Schefer, Robert W.

Sandia National Laboratories

关键词: 08 Hydrogen;    Methane;    Combustion;    Burners;    Flames;   

DOI  :  10.2172/811192
RP-ID  :  SAND2002-8609
RP-ID  :  AC04-94AL85000
RP-ID  :  811192

美国|英语

来源: UNT Digital Library

【 摘 要 】

The stability characteristics of a prototype premixed, hydrogen-fueled burner were studied. The potential application is the use of hydrogen as a fuel for aircraft gas turbine operation. The burner configuration consisted of nine 6.72 mm (0.265 in) diameter channels through which the reactants entered the burner. Hydrogen was injected radially inward through two 0.906-mm (0.0357 in) diameter holes located on opposite sides of each air channel. In this way the region over which hydrogen and air were premixed was minimized to prevent potential flashback problems. All tests were carried out at atmospheric pressure. Flame stability was studied over a range of fuel-lean operating conditions since lean combustion is currently recognized as an effective approach to NOx emissions reduction. In addition to pure hydrogen and air, mixtures of hydrogen-blended methane and air were studied to evaluate the potential improvements in flame stability as hydrogen replaces methane as the primary fuel component.