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| 1 | Investigations on an Axial Flow Fan Stage subjected to Circumferential Inlet Flow Distortion and Swirl显示文摘The combined effects of swirl and circumferential inlet flow distortion on the flow field of an axial flow fan stage are reported in this paper. The study involves measurements at the inlet of the rotor and exit of the rotor and stator at design and off design now conditions. The study indicated that at the design flow condition, swirl had caused deterioration of the performance in addition to that caused by distortfou. Pressure rise imparted in the distortion zone is higher than in the free zone. The attenuation of distortion is high in the presence of swirl. | M. Govardhan K. Viswanath (Thermal Turbomachines Laboratory Department of Mechanical Engineering, Indian Institute of Technology, Madras 600 036, India ) | 1997 | Journal of Thermal Science1997，6，4： | 20 |
| 2 | Computational Studies of Flow through Cross Flow Fans-Effect of Blade Geometry显示文摘This present paper describes three dimensional computational analysis of complex internal flow in a cross flow fan. A commercial computational fluid dynamics (CFD) software code CFX was used for the computation. RNG k-ε two equation turbulence model was used to simulate the model with unstructured mesh. Sliding mesh interface was used at the interface between the rotating and stationary domains to capture the unsteady interactions. An accurate assessment of the present investigation is made by comparing various parameters with the available experimental data. Three impeller geometries with different blade angles and radius ratio are used in the present study. Maximum energy transfer through the impeller takes place in the region where the flow follows the blade curvature. Radial velocity is not uniform through blade channels. Some blades work in turbine mode at very low flow coefficients. Static pressure is always negative in and around the impeller region. | M . GOVARDHAN D. LAKSHMANA SAMPAT | 2005 | Journal of Thermal Science2005，14，3： | 17 |
| 3 | 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 |
| 4 | A Fast and Highly Efficient Protocol for Reductive Amination of Aromatic Aldehydes Using NaBH4 and Isoxazole Amines in an Ionic Liquid Medium显示文摘用 NaBH4 和 isoxazole 胺的芳香的醛的减少的胺化作用在 Br 被执行 ? nsted 酸的离子的液体 1-methylimidazolium tetrafluoroborate [(HMIm ) BF4 ] 。没有任何不希望得到的方面产品形成,离子的液体在优秀收益为芳香的醛的有效转变起溶剂以及催化剂的双作用到杂环的代替的胺。最新综合的混合物(3, 6 和 7 ) 被红外, 1H NMR 和质量描绘光谱技术。 | Eligeti, Rajanarendar Atthunuri, Siva Rami Reddy Samala, Raju Shaik, Firoz Pasha Govardhan Reddy | 2011 | Chinese Journal of Chemistry2011，29，4： | 3 |
| 5 | A brief review of recent results in vortex-induced vibrations显示文摘 | C.H.K. Williamson R. Govardhan | 2007 | Journal of Wind Engineering & Industrial Aerodynamics2007，，6： | 2 |
| 6 | A brief review of recent results in vortex-induced vibrations显示文摘 | Williamson C H K Govardhan R | 2008 | Journal of Wind Engineering2008，96，： | 1 |
| 7 | A complementary numerical and physical investigation of vortex-induced vibration显示文摘 | Blackburn M Govardhan R N Williamson C H K | 2001 | Journal of Fluids and Structures2001，15，： | 1 |
| 8 | Vortex-induced vibrations 显示文摘 | Williamson C H K Govardhan R | 2004 | Annual Review on Fluid Mechanics2004，36，： | 1 |
| 9 | Vortex-induced Vibrations显示文摘 | WILLIAMSON C H K GOVARDHAN R | 2004 | Annual Review of Fluid Mechanics2004，36，： | 1 |
| 10 | Modes of vortex formation and frequency response of a freely vibrating cylinder 显示文摘 | Govardhan R N Williamson C H K | 2000 | Journal of Fluid Mechanics2000，420，： | 1 |
| 11 | Limb salvage surgery for pathological fractures in osteosarcoma显示文摘 | Natarajan M V Govardhan R H Williams S | 2000 | Int Orthop2000，24，3： | 1 |
| 12 | Vortex-induced vibrations 显示文摘 | WILLIAMSON C H K GOVARDHAN R | 2004 | Annual Review of Fluid Mechanics2004，36，1： | 1 |
| 13 | Evaluation of thermal characteristics of oscillating combustion显示文摘 | Govardhan J Rao G V S | 2010 | International Journal of Engineering Science and Technology2010，2，2： | 1 |
| 14 | Mean and fluctuating velocity fields in the wake of a freely-vibrating cylinder显示文摘 | GOVARDHAN R WILLIAMSON C H K | 2000 | Journal of Fluid and Structures2000，，15： | 1 |
| 15 | Cross-linked crystals of Candida rugosa lipase:highly efficient catalysts for the resolution of chiral esters显示文摘 | Lalonde JJ Govardhan C Khalaf N | 1995 | J Am Chem SOC1995，117，： | 1 |
| 16 | Vortex-induced vibrations显示文摘 | Williamson C H K Govardhan R | 2004 | Annual Review of Fluid Mechanics2004，36，1： | 1 |
| 17 | Vortex-induced Vibrations 显示文摘 | Williamson C H K Govardhan R | 2004 | Annu Rev Fluid Mech2004，，36： | 1 |
| 18 | Wake states and response branches of forced and freely oscillating cylinders 显示文摘 | Carberry J Govardhan R Sheridan J | 2004 | European Journal of Mechanics B/Fluids2004，23，： | 1 |
| 19 | Modes of Vortex Formation and Frequency Response of a Freely Vibrating Cylinder 显示文摘 | Govardhan R Williamson CH K | 2000 | Journal of Fluids Mechanics2000，420，： | 1 |
| 20 | Critical mass in vortex-induced vibration of a cylinder显示文摘 | Govardhan R Williamson C H K | 2004 | European Journal of Mechanics B/Fluids2004，23，： | 1 |
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