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您的检索式：作者名="Ramakrishna PV"
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| 1 | Stall Characteristics and Tip Clearance Effects in Forward Swept Axial Compressor Rotors显示文摘Tilting the blade sections to the flow direction (blade sweep) would increase the operating range of an axial compressordue to modifications in the pressure and velocity fields on the suction surface. On the other band, bladetip gap, though finite, has great influence on the performance of a turbomachine. The present paper investigatesthe combined effect of these two factors on various flow characteristics in a low speed axial flow compressor. Forthis present study, nine computational domains were modeled; three rotor sweep configurations (0°, 20° and 30°)and for three different clearance levels for each rotor. Commercial CFD solver ANSYS CFX 11.0 is used for thesimulations. Results indicated that tip chordline sweep is found to improve the stall margin of the compressor bymodifying the suction surface boundary layer migration phenomenon. Diffusion Factor (DF) contours showed theseverity of stalling with unswept rotor. For the swept rotors, the zones of high probable stall are less severe andthey become less in size with increasing sweep. Increment in the tip gap is found to gradually affect the performanceof unswept rotor, while the effect is very high for the two swept rotors for the earlier increments. As a minimumclearance is unavoidable, swept rotors suffer relatively higher deviation from the idealistic behavior than theunswept rotor due to tip clearance. | Ramakrishna PV Govardhan M | 2009 | Journal of Thermal Science2009，18，1： | 4 |
| 2 | Compative pharmacokinetic evaluation of compressed suppositories of diclofenac sodium in humans显示文摘 | Ramakrishna S Fadnavis NW Diwan PV | 1996 | Arzneimittelforscbung1996，46，2： | 1 |
| 3 | Comparative in vivo evaluation of propranolol hydrochloride after oral and transdermal administration in rabbits显示文摘 | Rao PR Reddy MN Ramakrishna S Diwan PV | 2003 | Eur J Pharm Biopharm2003，56，1： | 1 |
| 4 | Surgery in Hashimoto's thyroiditis : indications, complications, and associated cancers显示文摘 | Pradeep PV Ragavan M Ramakrishna BA | 2011 | J Postgrad Med2011，57，2： | 1 |
| 5 | Surgery in Hashimoto's thyroiditis: indications, complications, and associated cancers显示文摘 | Pradeep PV Ragavan M Ramakrishna BA | 2011 | Journal of postgraduate medicine2011，57，2： | 1 |
| 6 | Surgery in Hashi- moro's thyroiditis: indications, complications, and associated canc- ers 显示文摘 | Pradeep PV Ragavan M Ramakrishna BA | 2011 | J Postgrad Med2011，57，2： | 1 |
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