Discussion on back-to-back two-stage centrifugal compressor compact design techniques

Lei HUO, Huoxing LIU

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PDF(1426 KB)
Front. Mech. Eng. ›› 2013, Vol. 8 ›› Issue (4) : 390-400. DOI: 10.1007/s11465-013-0278-2
RESEARCH ARTICLE

Discussion on back-to-back two-stage centrifugal compressor compact design techniques

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Abstract

Design a small flow back-to-back two-stage centrifugal compressor in the aviation turbocharger, the compressor is compact structure, small axial length, light weighted. Stationary parts have a great influence on their overall performance decline. Therefore, the stationary part of the back-to-back two-stage centrifugal compressor should pay full attention to the diffuser, bend, return vane and volute design. Volute also impact downstream return vane, making the flow in circumferential direction is not uniformed, and several blade angle of attack is drastically changed in downstream of the volute with the airflow can not be rotated to required angle. Loading of high-pressure rotor blades change due to non-uniformed of flow in circumferential direction, which makes individual blade load distribution changed, and affected blade passage load decreased to reduce the capability of work, the tip low speed range increases.

Keywords

back-to-back / two-stage / centrifugal compressor / design / Internal flow

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Lei HUO, Huoxing LIU. Discussion on back-to-back two-stage centrifugal compressor compact design techniques. Front Mech Eng, 2013, 8(4): 390‒400 https://doi.org/10.1007/s11465-013-0278-2

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