초록 ▼

A description is given of a damping arrangement for reducing resonant vibrations in a combustion chamber (1), with a combustion-chamber wall (2), which is of double-walled design and, with an outer wall-surface part (22) and an inner wall-surface part (21) facing the combustion chamber (1), gastight

A description is given of a damping arrangement for reducing resonant vibrations in a combustion chamber (1), with a combustion-chamber wall (2), which is of double-walled design and, with an outer wall-surface part (22) and an inner wall-surface part (21) facing the combustion chamber (1), gastightly encloses an intermediate space (3), into which cooling air can be fed for purposes of convective cooling of the combustion-chamber wall ( 2). The invention is distinguished by the fact that at least one third wall-surface part (4) is provided, which, with the outer wall-surface part (22), encloses a gastight volume (5), and that the gastight volume (5) is connected gastightly to the combustion chamber (1) by at least one connecting line (6).

대표청구항 ▼

What is claimed as new and desired by Letters Patent of the United States is: 1. A damping arrangement for reducing resonant vibrations in a combustion chamber, the damping arrangement comprising: a double-walled combustion-chamber wall defining a combustion chamber and having an outer wall-surface

What is claimed as new and desired by Letters Patent of the United States is: 1. A damping arrangement for reducing resonant vibrations in a combustion chamber, the damping arrangement comprising: a double-walled combustion-chamber wall defining a combustion chamber and having an outer wall-surface part and an inner wall-surface part facing the combustion chamber, the outer wall-surface part and the inner wall-surface part gastightly enclosing an intermediate space into which cooling air can be fed for convective cooling of the combustion-chamber wall; at least one third wall-surface part which cooperates with the outer wall-surface part to enclose a gastight volume; at least one connecting line; wherein the gastight volume is connected gastightly to the combustion chamber by the at least one connecting line; and wherein the third wall-surface part is positioned on an opposite side of the outer wall-surface part from the combustion chamber and encloses the gastight volume with said outer wall-surface part. 2. The damping arrangement as claimed in claim 1, further comprising: at least one spacer element; and wherein the third wall-surface part is connected to the outer wall-surface part directly or indirectly via the at least one spacer element. 3. The damping arrangement as claimed in claim 1, wherein the double-walled combustion-chamber wall includes longitudinal ribs, holding ribs, or both longitudinal ribs and holding ribs, for the exact spacing, mutual fixing, or both exact spacing and mutual fixing, of the inner wall-surface part and the outer wall-surface part; and wherein the at least one connecting line is positioned at the location of the longitudinal, holding, or both, ribs and is constructed as a constructional unit with the longitudinal, holding, or both, ribs. 4. The damping arrangement as claimed in claim 3, wherein the longitudinal ribs, holding ribs, or both the longitudinal ribs and the holding ribs, are integrally connected to the inner wall-surface part by casting. 5. The damping arrangement as claimed in claim 1, wherein each at least one connecting line comprises a connecting tube that projects through the intermediate space and is configured and arrange to have cooling air flowing around the connecting tube. 6. The damping arrangement as claimed in claim 1, wherein the gastight volume comprises a Helmholtz resonator the acoustically effective volume of which is selected based on the acoustic damping of a vibration with a resonant frequency f occurring within the combustion chamber. 7. The damping arrangement as claimed in claim 6, further comprising: adjusting means for variably adjusting said acoustically effective volume, positioned within the gastight volume. 8. The damping arrangement as claimed in claim 7, wherein the adjusting means comprises a ram movably arranged within the gastight volume. 9. The damping arrangement as claimed in claim 6, wherein the at least one connecting line is arranged at a location relative to the combustion chamber at which an acoustic vibration to be damped has an antinode. 10. The damping arrangement as claimed in claim 1, wherein the third wall-surface part is elastic. 11. The damping arrangement as claimed in claim 10, wherein the at least one connecting line is arranged at a location relative to the combustion chamber at which an acoustic vibration to be damped has an antinode. 12. The damping arrangement as claimed in claim 1, wherein the combustion chamber is integrated into a heat-or energy-generating system. 13. The damping arrangement as claimed in claim 1, wherein the combustion chamber comprises a gas-turbine combustion chamber.