Area Schedule Based Design of High-Pressure Recovery Radial Diffusion Systems
Name
turbo_139_01_011012.pdf
Size
3.97 MB
Format
Adobe PDF
Checksum (MD5)
bed7195c09bdaa0353642ec2ddcc91e9
Author(s)
Rusch, Daniel
Hunziker, René
Gao, Ruhou
Spakovszky, Zoltan S
Date Issued
January 2017
Journal
Journal of Turbomachinery
Publisher
ASME International
Citation
Gao, Ruhou, et al. “Area Schedule Based Design of High-Pressure Recovery Radial Diffusion Systems.” Journal of Turbomachinery, vol. 139, no. 1, Sept. 2016, p. 011012. © 2017 by ASME
Version
Final published version
Abstract
High-pressure ratio centrifugal compressors require advanced diffusion systems to achieve enhanced efficiencies set by future turbocharger applications. To address the shortcomings of the commonly used channel diffuser and airfoil cascade design perspectives, a streamtube based area schedule is adopted paying special attention to the diffuser entry region. It is shown that the diffusion in the semivaneless space, controlled chiefly by inlet flow angle and the vane suction side geometry, plays a key role in improving diffuser performance. Removing excess thickness from the suction side eliminates flow overspeed, increases effective diffusion length, and leads to higher pressure recovery at reduced stagnation pressure loss. The pressure side thickness distribution controls the channel area schedule. Thin leading edges (LEs) ensure smooth flow area transition into the channel and reduce the vane upstream influence, mitigating high-cycle fatigue related mechanical issues.
MIT Department
Massachusetts Institute of Technology. Department of Aeronautics and Astronautics
Terms of Use
Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
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DOI of Published Version
https://doi.org/10.1115/1.4034488
