US 12,264,613 B2
Centrifugal compressor and turbocharger
Shotaro Watabe, Tokyo (JP); Kenichiro Iwakiri, Tokyo (JP); Yutaka Fujita, Tokyo (JP); and Yuki Yamada, Tokyo (JP)
Assigned to MITSUBISHI HEAVY INDUSTRIES ENGINE & TURBOCHARGER, LTD., Sagamihara (JP)
Appl. No. 18/289,059
Filed by MITSUBISHI HEAVY INDUSTRIES ENGINE & TURBOCHARGER, LTD., Sagamihara (JP)
PCT Filed Aug. 2, 2021, PCT No. PCT/JP2021/028667
§ 371(c)(1), (2) Date Oct. 31, 2023,
PCT Pub. No. WO2023/012882, PCT Pub. Date Feb. 9, 2023.
Prior Publication US 2024/0229707 A1, Jul. 11, 2024
Int. Cl. F02B 37/16 (2006.01); F01D 17/10 (2006.01); F02B 39/00 (2006.01)
CPC F02B 37/16 (2013.01) [F01D 17/105 (2013.01); F02B 39/00 (2013.01); F05D 2220/40 (2013.01); F05D 2260/606 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A centrifugal compressor comprising:
an impeller;
a compressor inlet flow path through which air is guided to the impeller;
a scroll flow path that is provided on an outer peripheral side of the impeller; and
a bypass flow path that branches off from the scroll flow path, that bypasses the impeller, and that is connected to the compressor inlet flow path,
wherein, when an outlet cross section of the bypass flow path refers to a flow path cross section of the bypass flow path at a connection position where the bypass flow path and the compressor inlet flow path are connected to each other, and the flow path cross section of the bypass flow path being viewed along a direction orthogonal to an axial direction of the impeller, a first area refers to an area of the outlet cross section that is closer to a downstream side in an axial direction of the impeller than a center of the outlet cross section is and that is closer to an upstream side in a rotation direction of the impeller than the center is, and a first area wall surface portion refers to a portion of a flow path wall surface of the bypass flow path at the outlet cross section that belongs to the first area, at least the first area wall surface portion of the flow path wall surface of the bypass flow path at the outlet cross section is composed of a curve, and
wherein at least the first area wall surface portion of the flow path wall surface of the bypass flow path at the outlet cross section is composed of a curve of which a curvature changes toward the downstream side in the axial direction.