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المؤلفIbrahim, Shahin
المؤلفAlqaradawi, Mohamed
المؤلفGadala, Mohamed
المؤلفBadr, Osama
تاريخ الإتاحة2024-01-18T10:04:28Z
تاريخ النشر2016-11-11
اسم المنشورAerospace Science and Technology
المعرّفhttp://dx.doi.org/10.1016/j.ast.2016.10.031
الاقتباسShahin, I., Alqaradawi, M., Gadala, M., & Badr, O. (2017). On the aero acoustic and internal flows structure in a centrifugal compressor with hub side cavity operating at off design condition. Aerospace Science and Technology, 60, 68-83.
الرقم المعياري الدولي للكتاب1270-9638
معرّف المصادر الموحدhttps://www.sciencedirect.com/science/article/pii/S1270963816309920
معرّف المصادر الموحدhttp://hdl.handle.net/10576/50913
الملخصThis paper covers the characterization of the acoustic noise and the unsteady flow field of a high speed centrifugal compressor NASA CC3. In order to accurately predict the noise, all analyses are carried out through the use of Large Eddy Simulation and Ffowcs Williams–Hawkings model for noise prediction. The relative effect of hub cavity on flow characteristics and sound levels is investigated, for a compressor stage with a total pressure ratio equal to 4, working from surge to near choke condition. In comparison with the experimental results from literature, the predicted compressor performance and flow field are predicted well, some trends seen in experiments are captured. The hub cavity flow effect on the compressor aero acoustic generated noise is shown in the paper. The unsteady static pressure and sound pressure levels are compared not only at different location but also for design and off design operating points. The internal flow results inside the hub cavity are presented at surge, design and near choke points. The conclusion is that the cavity effect of the centrifugal compressor cannot be ignored in the numerical prediction of aerodynamic generated noise. The impeller back plate of the rotor experiences a strong pressure fluctuation, which is maxima at the impeller outer radius for all operating point, but higher pressure values at the surge point.
راعي المشروعThis publication was made possible by NPRP grant No. 4-651-2-242 from the Qatar National Research Fund (a member of Qatar Foundation).
اللغةen
الناشرElsevier
الموضوعAero-acoustic
LES
Centrifugal compressor
Hub side cavity and surge
العنوانOn the aero acoustic and internal flows structure in a centrifugal compressor with hub side cavity operating at off design condition
النوعArticle
الصفحات68-83
رقم المجلد60
ESSN1626-3219
dc.accessType Open Access


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