Vibration reduction in a combustion chamber
US6595002B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 26, 2002 |
| Grant date | Jul 22, 2003 |
| Priority date | — |
| Expiry date | Apr 26, 2022 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF23D2210/00
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
A combustion chamber according to the invention has a number b0 of annularly arranged burners, of which a number k of modulatable burners have means for modulating a fuel mass flow, k being k<b0, and the modulatable burners being arranged in such a way that between every pair of adjacent modulatable burners are arranged in each case a1, a2, . . . ak nonmodulatable burners, and that the values a1+1, a2+1, . . . , ak+1 are not integral divisors of b0. In a preferred embodiment of the invention, a highest value ofLCM(b0, a1+1), LCM(b0, a2+1), . . . LCM(b0, ak+1)is maximum, LCM designating the lowest common multiple. It thereby becomes possible to damp a maximum number of azimuthal vibration modes of the combustion chamber by means of a minimum number of modulatable burners. Each pair of modulatable burners gives rise to at least one undesirable vibration or instability which, however, is damped by the other modulatable burner or burners arranged according to the invention.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.