Effect of blade tip geometry on centrifugal compressor performance and stability
المؤلف | Shahina, Ibrahim |
المؤلف | Alqaradawi, Mohamed |
المؤلف | Gadala, Mohamed |
المؤلف | Badr, Osama |
تاريخ الإتاحة | 2021-09-07T06:16:21Z |
تاريخ النشر | 2016 |
اسم المنشور | Journal of Engineering and Applied Sciences |
المصدر | Scopus |
الرقم المعياري الدولي للكتاب | 1816949X |
الملخص | The reliability operation for small fuel cells and hybrid fuel cell with gas turbine requires centrifugal compressor surge prevention. This study concerns a high speed centrifugal compressor stage with different blade tip geometries. The investigations were performed with unsteady three-dimensional, compressible flow simulations. A novel parameterization method has been developed to alter the tip geometry of an impeller blade. Different tip geometries are investigated includes flat tip blade, main blade winglet, main and splitter blade winglet and finally pressure side grooved tip. The performance and internal flow results are presented at surge, design and near choke points. The conclusion is that the tip geometry has a significant effect on the compressor performance and the operation stability at lower flow rates. The pressure ratio and surge margin for the blades with winglet have been improved and decreased for the grooved tip geometry. More uniform flow at impeller outlet with winglet blade. The use of winglet tip displaces the tip leakage vortex away from the blade and weakening the impingement effect. The winglet tip reduce the aerodynamic losses by unloading the tip section, reducing the leakage flow rate and turning the leakage flow in a more stream wise direction. Medwell Journals, 2016. |
راعي المشروع | Ths publication was made possible by NPRP grant No. 4-651-2-242 from the Qatar National Research Fund (a member of Qatar Foundation). The statements made herein are solely the responsibility of the researchers. |
اللغة | en |
الناشر | Medwell Journals |
الموضوع | Blade tip Centrifugal compressor Losses Performance and stability Surge |
النوع | Article |
الصفحات | 2769-2774 |
رقم العدد | 12 |
رقم المجلد | 11 |
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