公开(公告)号：JP2000088251A

公开(公告)日：2000-03-31

申请号：JP25309599

申请日：1999-09-07

Applicant: ABB RESEARCH LTD

Inventor： PASCHEREIT CHRISTIAN OLIVER DR ,  WOLFGANG WEISSENSTEIN ,  EPHRAIM GATMARK ,  POLIFKE WOLFGANG DR

IPC: F23R3/30 ,  F02C9/28 ,  F02C9/40 ,  F23R3/28 ,  F23R3/36

Abstract: PROBLEM TO BE SOLVED: To minimize the pressure amplitude of thermoacoustic vibration in a gas turbine combustion chamber by supplying liquid or gaseous mixing fuel via two fuel lines, and by adjusting the amount of supplied fuel for each fuel line via a fuel valve. SOLUTION: A premixing burner forms fuel lines 13 and 14 with an opening 15. The amount of fuel being supplied to the premixing burner via the fuel lines 13 and 14 is changed via one fuel valve for each. Therefore, the amount of fuel being supplied via the fuel line 13 is adjusted regardless of the adjustment of the amount of fuel being supplied via the fuel line 14. More specifically, when the maximum injection is made via the fuel line 13, the minimum injection is carried out via the fuel line 14, and gaseous or liquid fuel 16 is mixed with combustion air 7 via the opening 15.

公开(公告)号：JPH10169986A

公开(公告)日：1998-06-26

申请号：JP32803597

申请日：1997-11-28

Applicant: ABB RESEARCH LTD

Inventor： PASCHEREIT CHRISTIAN OLIVER DR ,  POLIFKE WOLFGANG DR ,  SATTELMAYER THOMAS DR

IPC: F23C6/04 ,  F23M20/00 ,  F23M99/00 ,  F23R3/16 ,  F23R3/42 ,  F23M13/00

Abstract: PROBLEM TO BE SOLVED: To significantly absorb vibration of low frequency in a combustion chamber. SOLUTION: Preparation of heat gas in a combustion chamber is performed continuously in two combustriuon steps (20, 40). A cross section narrowed part when viewed in a flow direction is disposed at a final end of the first combustion stage (20). Heat gas (21) prepared in the first combustion stage (20) through the cross section narrowed part is transferred to the second combustion stage (40). A mach number in an outlet (31) of the cross section narrowed part (30) corresponds to an area ratio of an outlet surface (A2) to an inlet surface (A1).

公开(公告)号：DE19649486A1

公开(公告)日：1998-06-04

申请号：DE19649486

申请日：1996-11-29

Applicant: ABB RESEARCH LTD

Inventor： PASCHEREIT CHRISTIAN OLIVER DR ,  POLIFKE WOLFGANG DR ,  SATTELMAYER THOMAS DR

IPC: F23C6/04 ,  F23M20/00 ,  F23R3/16 ,  F23R3/42

Abstract: The chamber comprises a cross-sectional narrowing (30) in the flow direction which enables the transition of the hot gases (21) between the first stage (20) and the succeeding stage (40). The cross-sectional narrowing has a structure with the Mach number at the outlet (31) being equal to the surface ratio of the narrowing. The surface ratio is a quotient of the outlet surface (A2) over the inlet surface (A1). The axial length (L) of the cross-sectional narrowing is 5% greater than the diameter at the inlet surface. The combustion chamber is of the ring type and is operable with at least one pre-mix burner (10).