Publications
| # | Published Date | Details |
|---|---|---|
| 141. | 22-09-2022 | ii) Rudra Naik, Ravikumar M “Impact of Nano Sized Sic and Gr on Mechanical Properties of Aerospace Grade Al7075 Composites”, Frattura ed Integrita Structures”, Frattura ed Integrità Strutturale Authors: Rudra Naik, Ravikumar M Link |
| 142. | 15-09-2022 | Effect of Process Parameters on Surface Roughness, Thrust Force and Tool Wear of Coated HSS Tool during Drilling of Customized EN8 Alloy, Journal of Mechanical Engineering, 19(3), 113-134, 2022.
Authors: D. Roopa, Vardhaman S. Mudakappanavar, R. Suresh, Tataram K. Chavan Link |
| 143. | 01-09-2022 | Effect of Process parameters on Linear Friction welding of Commercial Grade Pure Aluminum.
International Journal of Engineering Research and Advanced Technology, Vol. 8, No 9, 2022.
E-ISSN : 2454-6135
Authors: Adityan R, Vardhaman S. Mudakappanavar, and G. R. Gurunagendra Link |
| 144. | 27-08-2022 | Thermal performance analysis of a mixed-flow indirect evaporative cooler, Applied Thermal Engineering, Elsevier publisher Authors: C. Deepak, Rudra Naik, Sangamesh C. Godi, Chidanand K. Mangrulkar, Prashanth H.K. Link |
| 145. | 24-08-2022 | Workability Studies on Al6061 Alloy and Al6061 Metal Matrix Composites Reinforced with Silicon Carbide Particles Under Cold Backward Extrusion, J. Inst. Eng. India Ser. D
Authors: R. Venkatesh, C. A. Niranjan, S. Srinivas, T. Raghavendra, Link |
| 146. | 21-07-2022 | Influence of Alloying Element and Ageing on
Microstructure and Dry Sliding Wear Behaviour of
Cu-Zn-xNi Alloy
Journal of Mines, Metals and Fuels, 70(7) : 1-15; 2022. DOI: 10.18311/jmmf/2022/30799 Authors: A. N. Santhosh, S. Aprameyan , Suresh Erannagari andasantha Kumar Link |
| 147. | 15-06-2022 | Thermal analysis on Ti-6AL-4V tool architecture using Johnson–Cook material model”, Global Transition Proceedings, Elsevier B.V. on behalf of KeAi Communications Co.Ltd Authors: N.Mohan, Kavadiki Veerabhadrappa, J. Sharana Basavaraja, B.G.Suhas and R. Suresh Kumar Link |
| 148. | 06-06-2022 | Journal of Engineering Science & Technology Authors: SUHAS B Gopalakrishna, RAJESH Ravi, CHIDANAND K Mangrulkar, KIRAN KUMAR K Umashankar, SHIVAPRASAD K Vijayalakshmi Link |
| 149. | 03-06-2022 | "Numerical Analysis on Performance Evaluation of a Flat Plate Louvered Fin Heat Exchanger" Journal of Engineering Science and Technology, School of Engineering, Taylor’s University (2022), 17(3),1867-1879
Authors: Suhas B.G, Kiran kumar K.U and Chidanand Mangrulkar Link |
| 150. | 16-05-2022 | Power Generation Using Ocean Waves: A Review, Kavadiki Veerabhadrappa, Global Transitions Proceedings, Elsevier B.V. on behalf of KeAi Communications Co.Ltd. Authors: Kavadiki Veerabhadrappa, B.G. Suhas, Chidanand K. Mangrulkar, R. Suresh Kumar, V.S. Mudakappanavar, Narahari Link |
| 151. | 16-05-2022 | Power Generation Using Ocean Waves: A Review
Global Transitions Proceedings, Volume 3, Issue 2, Pages 359-370.
Authors: Kavadiki Veerabhadrappa , B.G. Suhas , Chidanand K. Mangrulkar , R. Suresh Kumar , V.S. Mudakappanavar , Narahari , K.N. Seetharamu Link |
| 152. | 16-05-2022 | Power Generation Using Ocean Waves: A Review, Global Transitions Proceedings, Volume 3, Issue 2, November 2022, Pages 359-370 Authors: Kavadiki Veerabhadrappa, B.G. Suhas, Chidanand K. Mangrulkar, R. Suresh Kumar, V.S. Mudakappanavar, Narahari, K.N. Seetharamu Link |
| 153. | 10-05-2022 | Experimental studies on thin layer drying of mint leaves in a solar dryer and under open sun, Current Science, Vol. 122, No.9, 10 May 2022, p. 1066 Authors: Praveen T. Hunashikatti, Suresh Ramaswwamyreddy, Prerak M. Sethia, Shikhar Goyal, S. K. Rohan, Shravan Raj |
| 154. | 06-05-2022 | ASSESSMENT OF MECHANICAL AND TRIBOLOGICAL PROPERTIES OF MONO AND HYBRID COMPOSITE BY STATISTICAL TECHNIQUE, Preprint, https://doi.org/10.21203/rs.3.rs-1558111/v1 PPR: PPR489732. Authors: M RAVIKUMAR, RUDRA NAIK, REDDAPPA HN Link |
| 155. | 06-04-2022 | Mechanical Strengthening of Lightweight Aluminium Alloys through Friction Stir Process, Hindawi Advances in Materials Science and Engineering Volume 2022, Article ID 8907250, 10 pages
https://doi.org/10.1155/2022/8907250 Authors: P. Yogesh, Santaji Krishna Shinde, Shyamlal. C, R. Suresh kumar, Moti Lal Rinawa, G. Puthilibai, M. Sudhakar ,Kassu Negash,and Rajesh S Link |
| 156. | 31-03-2022 | MACHINABILITY STUDY ON Al7075/Al2O3-SiC HYBRID COMPOSITES, Metallurgical and Materials Engineering, 28 (1), pp. 61-77. Authors: M RAVIKUMAR, HN REDDAPPA, R SURESH, RAMMOHAN, ER BABU, NAGARAJA C REDDY Link |
| 157. | 08-03-2022 | Development of Zinc and Low Carbon Steel Coatings on ABS Plastic by Electric ARC Spraying, SAE Technical Paper 2022-01-0057, 2022, doi:10.4271/2022-01-0057. Authors: Ramesh Chinnakurli Suryanarayana, Praveennath G Koppad, Suresh Kumar R, Keshavamurthy R Link |
| 158. | 02-03-2022 | Influence of process parameters on tool wear and temperature of coated HSS tools on drilling of hardened EN8 alloy steel Authors: D.Roopa, Vardhaman S Mudakappanavar, R. Suresh, Tataram K Chavan Link |
| 159. | 02-03-2022 | Fluid friction/heat transfer irreversibility and heatfunction study of MWCNT-water nanofluid filled porous cavity Authors: A. Vanav Kumar, L. Jino, G. Saravanakumar Link |
| 160. | 28-02-2022 | Comparison of Leakage Flow Performance Analysis of Newly Designed Finger Seal with Radial Wedge
Rajesh P 1, Dr.J Sharana Basavaraja 2, Dr.V Arun Kumar3
1 Assistant Professor, B.M.S College of Engineering, Bangalore – 560019(INDIA)
2 Professor, B.M.S College of Engineering, Bangalore – 560019(INDIA)
3 Consultant, R&D, B.M.S College of Engineering, Bangalore – 560019(INDIA)
Keywords: Finger seal, Leakage analysis, Mass flow rate
ABSTRACT
Finger seals are mainly used to have reduced leakage of gases from high pressure region to low pressure region. Also they have very low wear rate. To further improve on the leakage reduction and wear of seals, a new type of finger is designed to have better results both at low as well as at high speeds. For the above objective to be achieved a radial static pressure wedge is introduced between the pad of the seal and the rotor surface. Radial Static wedge is achieved by introducing a tapper in the pad along the direction of rotation of the rotor which is effective at the start of the rotation. Introduction of pressure wedge created a resistance to the flow of air in axial direction thereby reducing the leakage by 10% in comparison with the conventional finger seal with no pressure wedge.
1. INTRODUCTION
The three major seal used in Industries are labyrinth, brush seal and the finger seal. The most commonly used seals in turbo machinery applications is labyrinth seals which possess advantages such as simplicity, reliability and tolerance to large thermal and pressure variations and also works on the principle that fluid pressure energy is converted at each tooth tip clearance into kinetic energy that is either dissipated into heat by turbulence or enters the subsequent tooth clearance by kinetic energy carry over. With all this advantage it possesses a problem wear so it cannot maintain very tight radial clearance [1&2]. This gives a scope for noncontact type of seal which reduces the clearance between the shaft and the seal and also increases the life of the seal because of its complaints feature. This Compliant features allow seal to accommodate shaft dynamic motion while maintaining seal clearance and results in little to no wear and long life with an enhanced sealing capability.
2. Methodology
2.1 Description of experimental installation
Experimental setup consists of air supply system through a compressor to supply pressurized air on one side of the system and a flow meter to measure the air flow and also control the air flow and a pressure gauge to measure the pressure. The drive unit consists of Variable Frequency Drive which can run the rotor up to 24000 rpm.
2.2 Seal for Experimental Testing
Spring Steel is used for manufacturing the finger seal in order to maintain the flexibility of the finger. Seals with the outer diameter of 110mm, inner diameter of 80mm and thickness of 4 mm with Finger sticks created on the circumference of the inner diameter of the seal was fabricated using Wire EDM. The seal fabricated is as shown below in Figure 1. Tapper created in the finger seal is clearly visible in the figure 1b shown below.
a) b)
Figure 1: a) Finger Seal without Pressure wedge and b) Finger Seal with pressure wedge
3. Results and Discussion
3.1 Leakage Analysis of Three Row Finger Seal
Finger seal with Radial wedge and without Radial wedge was subjected to a leakage test using the test rig for different Inlet pressure of 4, 6, 8 and 10 bar. Experimental results showed a reduction of nearly 10 percent in Leakage by finger seal with a Radial wedged in comparison seal without wedge. Graph shown in the figure 2 shows the comparison of leakage flow between the finger seals with and without Radial wedge.
Figure 2: Graph showing the Experimental leakage flow comparison between the seal with and without Radial wedge
4. Conclusion
Finger seal with radial wedge and without radial wedge were subjected to leakage test for varying differential pressure of 4, 6, 8 and 10 bar. Flow through the clearances experienced a resistance by the Radial pressure wedge created in the finger seal due to the tapper created in the Pad and showed a better result in comparison to the conventional finger seal. The Introduction of wedge showed reduction of nearly 10% in leakage in comparison with the conventional finger seal.
References
[1] Delgado, Irebert R., and Margaret P. Proctor."Continued investigation of leakage and power loss test results for competing turbine engine seals." AIAA Paper 2006-4754, 2006.
[2] Delgado, Irebert R., and Margaret P. Proctor."leakage and power loss test results for competing turbine engine seals." AIAA Paper 2006-4754, 2006.
[3] Chen Guoding, Wang Li’na, Yu Qiangpeng and Su Hua.“Dynamic analysis of C/C composite finger seal." Chinese Journal of Aeronautics 2014,27(3):745-748.
[4] Hazel, M. "A study of non-contacting passive-adaptive turbine finger seal performance." Ph.D. Thesis, 2007, The University of Akron, 2007.
[5] Proctor, Margaret P, and Irebert R. Delgado. "Preliminary test results of a non-contacting finger seal on a herringbone-grooved rotor." NASA Technical Memorandum NASA/TM-2008-215475, 2008.
Acknowledgements
The author is extremely grateful to the organization B.M.S. College of engineering, Bangalore and TEQIP-III for awarding financial assistantship towards meeting the conference expenses. Also thanks to all the members of the organizers’ of the conference MITC2020ne for accepting my paper and allowing me to present at the conference.
Authors: Rajesh P,J Sharana Basavaraja Link |