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AuthorHalawa, Taher
AuthorAlqaradawi, Mohamed
AuthorBadr, Osama
AuthorGadala, Mohamed S.
Available date2024-01-18T11:13:34Z
Publication Date2014-07
Publication NameAmerican Society of Mechanical Engineers, Power Division (Publication) POWER
Identifierhttp://dx.doi.org/10.1115/POWER2014-32052
CitationHalawa, T., Alqaradawi, M., Badr, O., & Gadala, M. S. (2014, July). Numerical investigation of rotating stall characteristics and active stall control in centrifugal compressors. In ASME Power Conference (Vol. 46094, p. V002T11A002). American Society of Mechanical Engineers.
ISBN978-079184609-4
URIhttps://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=84911961774&origin=inward
URIhttp://hdl.handle.net/10576/50923
AbstractThis paper focuses on providing better view for the understanding of rotating stall phenomenon in centrifugal compressors by using numerical simulations and presents a study of the role of air injection method in delaying stall inception by using different injection parameters aiming at increasing the efficiency of this method. Results showed that the formation of stall begins at the impeller inlet due to early flow separation at low mass flow rates and due to the increase of the turbulence level and the absence of fluid orientation guidance at the vaneless region. The flow weakness causes back flow that results in the formation of the tip leakage flow which causes stall development with time. Results also showed that using air injection at specified locations at the vaneless shroud surface at injection angle of 20° and with injection mass flow rate of 1.5% of the inlet design mass flow rate, can delay the stall onset to happen at lower mass flow rate about 3.8 kg/s comparing with using injection with angle of 10° with different injection mass flow rates and also comparing with the case of no injection.
Sponsor- Qatar National Research Fund (QNRF) - Grant No. NPRP 4 - 651 - 2 - 242
Languageen
PublisherAmerican Society of Mechanical Engineers (ASME)
SubjectTurbulence level
Computational fluid dynamics
TitleNumerical investigation of rotating stall characteristics and active stall control in centrifugal compressors
TypeConference Paper
Volume Number2
dc.accessType Abstract Only


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