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Centrifugal compressors are designed for a given operating pressure and mass flow rate. These machines are often run at off-design conditions depending on the requirement from industrial to Aerospace applications. The need to maintain relatively high efficiency under offdesign conditions with adequate stall margin makes the compressor design more challenging. These necessities demand improvement in the flow conditions through the impeller by optimizing the vane shape. Much of the research was carried out on impeller vane shape to minimize the wake regions at impeller exit, and one such effort was to introduce a blade lean at impeller inlet and exit. An investigation from the experimental studies revealed the authors that the introduction of lean at exit suppressed the wake flow regions and henceforth improved the impeller performance either with improved pressure rise or with increased stall margin. Though many of the research studies have proven the influence of lean on the change in the Centrifugal impeller performance, the study was pertained with a combination of positive inlet and exit leans or negative inlet and exit leans that has shown no change in surge margin improvement.
K V Jagadeeshwar Chary. 2017. \u201cNumerical Studies on Centrifugal Impeller Performance with Different Lean Combinations\u201d. Global Journal of Research in Engineering - D: Aerospace Science GJRE-D Volume 17 (GJRE Volume 17 Issue D2): .
Crossref Journal DOI 10.17406/gjre
Print ISSN 0975-5861
e-ISSN 2249-4596
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Total Score: 103
Country: India
Subject: Global Journal of Research in Engineering - D: Aerospace Science
Authors: K.V Jagadeeshwar Chary, K. Vijaya Kumar Reddy, T.Ch. Siva Reddy (PhD/Dr. count: 0)
View Count (all-time): 215
Total Views (Real + Logic): 3253
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Publish Date: 2017 12, Wed
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Centrifugal compressors are designed for a given operating pressure and mass flow rate. These machines are often run at off-design conditions depending on the requirement from industrial to Aerospace applications. The need to maintain relatively high efficiency under offdesign conditions with adequate stall margin makes the compressor design more challenging. These necessities demand improvement in the flow conditions through the impeller by optimizing the vane shape. Much of the research was carried out on impeller vane shape to minimize the wake regions at impeller exit, and one such effort was to introduce a blade lean at impeller inlet and exit. An investigation from the experimental studies revealed the authors that the introduction of lean at exit suppressed the wake flow regions and henceforth improved the impeller performance either with improved pressure rise or with increased stall margin. Though many of the research studies have proven the influence of lean on the change in the Centrifugal impeller performance, the study was pertained with a combination of positive inlet and exit leans or negative inlet and exit leans that has shown no change in surge margin improvement.
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