Continuous-flow machine, turbine, or compressor
View Patent ↗A continuous-flow machine ( 1 ), in particular a turbine or a compressor, includes at least one stator blade section ( 2 ) which has a plurality of stator blades ( 3 ) which project into a gas path ( 10 ) of a working gas, and at least one adjacent section ( 6 ), which has a plurality of adjacent elements ( 7 ), which bound the working gas path ( 10 ) at the side. A gap ( 11 ), through which a cooling gas can be introduced into the working gas path ( 10 ), is formed between the stator blades ( 3 ) of the stator blade section ( 2 ) and the adjacent elements ( 7 ) of the adjacent section ( 6 ). In order to improve the efficiency of the continuous-flow machine ( 1 ), lateral seals ( 14 ) are formed in the gap ( 11 ) and prevent or at least impede pressure equalization and/or a gas flow in the gap ( 11 ) in the lateral direction ( 5 ).
1. A continuous-flow machine comprising:
at least one stator blade section having a plurality of stator blades arranged alongside one another in a lateral direction running transversely with respect to a main flow direction of a working gas and projecting into a gas path of the working gas;
at least one adjacent section adjacent to the at least one stator blade section in the main flow direction and having a plurality of adjacent elements arranged alongside one another in the lateral direction and which bound the working gas path at a side;
a gap formed between stator blades of the at least one stator blade section and adjacent elements of the at least one adjacent section, the gap extending in the lateral direction and through which a cooling gas can be introduced into the working gas path; and
lateral seals in the gap configured and arranged to at least impede pressure equalization, gas flow, or both, laterally in the gap.
2. The continuous-flow machine as claimed in claim 1 , wherein the at least one stator blade section comprises a stator blade row.
3. The continuous-flow machine as claimed in claim 1 , wherein the lateral seals are arranged in an area of a stagnation-point pressure wave of a respective stator blade or in an area of a wake pressure wave of a respective stator blade.
4. The continuous-flow machine as claimed in claim 1 , wherein the lateral seals are arranged along the gap to define first and second gap sections, the first gap sections positioned where a stagnation-point pressure wave of a respective stator blade or a wake pressure wave of a respective stator blade strikes the gap, the first gap sections being separated from and adjacent to the second gap sections.
5. The continuous-flow machine as claimed in claim 4 , further comprising:
cooling gas introduced into the gap with a higher pressure in the first gap sections than in the second gap sections.
6. The continuous-flow machine as claimed in claim 1 , wherein the lateral seals comprise pins or webs which project in the main flow direction from a respective stator blade, from a respective adjacent element, or from both, in the gap.
7. The continuous-flow machine as claimed in claim 6 , wherein the pins or webs define a longitudinal direction which extends transversely with respect to the main flow direction and transversely with respect to the lateral direction.
8. The continuous-flow machine as claimed in claim 6 , wherein the lateral seals comprise receptacles or grooves formed in a respective stator blade, in a respective adjacent element, or in both, opposite the pins or webs in the main flow direction in the gap.
9. The continuous-flow machine as claimed in claim 8 , wherein the pins or webs engage in the receptacles or grooves in the main flow direction.
10. The continuous-flow machine as claimed in claim 6 , wherein at least some of the pins or webs each have at least one cooling gas channel configured and arranged to permit cooling gas to be introduced into the gap.
11. The continuous-flow machine as claimed in claim 6 , wherein the continuous-flow machine comprises a rotating continuous-flow machine having a stator and a rotor, the rotor configured and arranged to rotate about a longitudinal centre axis, wherein a main flow direction runs axially and the lateral direction runs in the circumferential direction, and wherein a longitudinal direction of said pins or webs runs radially.
12. The continuous-flow machine as claimed in claim 1 , wherein dimensions of the stator blades and of the adjacent elements are matched to one another such that a respective gap is open when the continuous-flow machine has cooled down, and is closed when the continuous-flow machine is at an operating temperature.
13. The continuous-flow machine as claimed in claim 1 , further comprising at least one of:
a support, and a seal extending in the lateral direction in the gap between the respective adjacent element and said support, the adjacent element attached to the support; and
a support, and a seal extending in the lateral direction in the gap between respective stator blades and said support, the stator blades attached to the support.
14. The continuous-flow machine as claimed in claim 1 , wherein the gap is positioned in the main flow direction such that cooling gas emerges from the gap and enters the gas path with a velocity component running parallel to the main flow direction.