Submission
DESIGN PRINCIPLES FOR CENTRIFUGAL COMPRESSOR DIFFUSERS BASED ON THE USE OF VELOCITY DISTRIBUTION
DOI: 10.18462/iir.compr.2021.0430
Session: Ejectors and centrifugal compressors 1
Accept state: Submission accepted
Authors
| Name | Organization | |
|---|---|---|
| Andrii Lazarenko, student | Sumy state university, Ukraine | |
| Mykola Kalinkevych, PhD, prof. | Sumy state university, Ukraine | |
| Mykola Radchenko, Dr., prof. | Admiral Makarov National University of Shipbuilding |
Abstract
This paper describes the design principles of diffusers based on physical and mathematical models of the flow of swirling viscous compressed gas. According to the presented method, the diffusers’ design is based on the preseparation condition of the boundary layer along one of the outer surfaces. Numerical and experimental research was performed for different compressor stages. Conducted experimental calculation studies and comparison of design and experimental characteristics of diffusers and flow parameters in diffusers confirm the efficiency of the diffuser, which was designed using the presented method and the adequacy of mathematical models with the physical processes of gas flow in diffusers. A new method of designing the vane diffusers and channel diffusers with a predetermined velocity distribution on vane surfaces provides an improvement in the gas-dynamic characteristics of diffusers compared to traditional geometry diffusers.
Keywords
centrifugal compressor,
method of the design,
vane diffuser,
channel diffuser,
experimental research.