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# Published Date Details
121.10-05-2022Experimental 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
122.06-05-2022ASSESSMENT 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
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123.06-04-2022 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
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124.31-03-2022MACHINABILITY 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
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125.08-03-2022Development 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
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126.02-03-2022Influence 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
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127.02-03-2022Fluid friction/heat transfer irreversibility and heatfunction study of MWCNT-water nanofluid filled porous cavity
Authors: A. Vanav Kumar, L. Jino, G. Saravanakumar
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128.28-02-2022Comparison 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
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129.28-02-2022Experimental analysis for Leakage Flow in a Newly Designed finger Seal with Axial Wedge Rajesh P 1, J Sharana Basavaraja 2, 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, Axial wedge, Leakage analysis, Mass flow rate ABSTRACT Power losses in secondary cycle of jet engine are result of secondary seal leakage. Overall performance of turbine increases if the leakage reduces, hence sealing plays a major role in gas turbine. A lot of work is being done on optimizing leakage by making changes in the seal design and reduce the wear between the rotor and the seal. The main objective of this work is to create a pressure wedge in direction opposite to the leakage flow and control the flow. To achieve this a tapper is introduced in the pad and a pressure wedge is created which helps in hydrodynamic lifting of the finger and also reduce leakage. An experimental study of leakage for the seal with wedge and without wedge is performed and the results are compared. The experimental study showed that there was a reduction of leakage by nearly 15% at higher pressure in comparison to conventional seal. 1 INTRODUCTION In a gas turbine the major role is played by seals in term of improving performance, reliability and work life of engines. Commonly used seals in turbo machinery applications are labyrinth seals, Labyrinth are simple to manufacture and assemble, they are reliable with good sealing and tolerance to large thermal and pressure variations. Labyrinth seals works on the principle that fluid pressure energy been converted at each tooth tip clearance into kinetic energy that is dissipated into heat by turbulence and enters the subsequent tooth clearance by kinetic energy carry over. With all this advantage it possesses a problem in terms of 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 this type of seal to accommodate shaft dynamic motion while maintaining seal clearance. This results in little to no wear and long life capability and also good sealing capability. The complaint feature can be obtained by finger seal and brush seal but the brush seal gets stiffened at such high pressure and temperature making finger seal as the area of research. 2 Methodology 2.1 Seal for Experimental Testing Annealed spring steal is used to manufacture the developed finger seal. 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. Figure 1 shows the fabricated finger seal. Figure 1: Finger Seal without axial wedge 3 Results and Discussion 3.1 Leakage Analysis of Three Row Finger Seal Both the finger seal with axial pressure wedge, i.e. wedge against the direction of leakage flow and along the leakage flow, 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 variation of nearly 13 to 30 percent in leakage with the increase in pressure. The seal with a pressure wedge against the flow showed reduced leakage in comparison with seal with pressure wedge along the direction of the leakage. Graph showing the comparison between conventional finger seal, Increasing and decreasing pressure wedge is as shown in figure 2. Figure 2: Experimental leakage flow comparison with conventional finger seal 4 Conclusion Experiment for leakage was conducted at 10,000 Rpm at different Inlet pressures and leakage was measured using a flow meter. Pressure wedge created by the introduction of tapper in the pad created a resistance to leakage through clearance. Results showed Introduction of wedge reduced leakage by 19% 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
130.14-02-2022OPTIMIZATION OF WEAR BEHAVIOUR OF Al7075/SiC/Al2O3 MMCS USING STATISTICAL METHOD, Advances in Materials and Processing Technologies, 8 (4), pp. 4018-4035.
Authors: M RAVIKUMAR, HN REDDAPPA, R SURESH, ER BABU, NAGARAJA C REDDY
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131.31-01-2022" STUDY ON THE TRIBOLOGICAL PROPERTIES OF A356/AL2O3 AND PARAMETRIC OPTIMIZATION OF WEAR BEHAVIOUR USING TAGUCHI AND RSM" International Journal of Innovative Research in Advanced Engineering (IJIRAE), Volume 09, Issue 01 January 2022 Mendeley (Elsevier Indexed) Citefactor 3.19 (2019) IMPACT FACTOR VALUE: |INNOSPACE: 7.301 (2019) | PIF: 6.469 | JOUR INFO:7.345 | | ISRAJIF: 7.342(2019) | INDEX COPERNICUS 2019 = 194.51
Authors: Kirankumar N,Dr. B N Sarada.Dr. P L Srinivasamurthy.Dr. Mallaradhya H M
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132.06-12-2021Title: Analysis and Optimization of Dimensional Accuracy and Porosity of High Impact Polystyrene Material Printed by FDM Process: PSO, JAYA, Rao, and Bald Eagle Search Algorithms. Journal: Materials. Volume: 14. Issue: 23. Pages: 7479.1-7479.20. Publisher: MDPI.
Authors: Manjunath Patel Gowdru Chandrashekarappa, Ganesh Ravi Chate, Vineeth Parashivamurthy, Balakrishnamurthy Sachin Kumar, Mohd Amaan Najeeb Bandukwala,Annan Kaisar, Khaled Giasin, Danil Yurievich Pimenov and Szymon Wojciechowski
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133.03-12-2021Investigating The Lubricated Sliding Wear Behaviour of Aluminium Matrix Composite Produced by Stir – Squeeze Cast Process Nat.Volatiles&Essent.Oils,2021;8(5):6861-6877
Authors: Bharathi.V , Prabhu Swamy N R , B R Ramji , M. Ramachandra , S. Srinivas
134.01-12-2021The Tribological investigation of A356/ Aluminium oxide Metal Matrix Composite by Taguchi’s Techniques; International Journal of Mechanical Engineering
Authors: Kiran Kumar N a*, B N Sarada b, P L Srinivasa Murthy c, Chethana K Y d
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135.30-11-2021INVESTIGATING THE LUBRICATED SLIDING WEAR BEHAVIOUR OF ALUMINIUM MATRIX COMPOSITE PRODUCED BY STIR – SQUEEZE CAST PROCESS” Nat.Volatiles&Essent.Oils,2021;8(5):6861-6877, e-ISSN: 2148-9637, Impact Score: 0.65 (Q3)
Authors: Bharathi.V, Prabhu Swamy N R, B R Ramji, M. Ramachandra, S. Srinivas,
136.01-10-2021STUDY ON MICRO-NANO SIZED Al2O3 PARTICLES ON MECHANICAL, WEAR AND FRACTURE BEHAVIOR OF Al7075 METAL MATRIX COMPOSITES, Frattura ed Integrita Strutturale, 15 (58), pp. 166-178.
Authors: M RAVIKUMAR, HN REDDAPPA, R SURESH, ER BABU, NAGARAJA C REDDY
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137.30-09-2021"Conjugate Heat Transfer Analysis of Flat Plate Subjected to Impingement and Film Cooling", International Journal for Research in Applied Science and Engineering Technology, Volume 9 Issue IX Sep 2021, pg 1667-1678.
Authors: Devaraj K, Ganesh N
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138.28-09-2021“Fracture mechanics comparison studies on an edge cracked specimen and compact tension specimen using ABAQUS” International Journal of Advanced Research in Basic Engineering Sciences and Technology (IJARBEST), Vol.7, Issue.9, September 2021 Pages 1-8,ISSN (ONLINE):2456-5717
Authors: Vishwas B Patil,H. K. Rangavittal and Kiran Sundara Rajan
139.10-09-2021Influence of process parameters on tool wear and temperature of coated HSS tools on drilling of hardened EN8 alloy steel, Materials Today (Proceedings), 50(5),1713-1720. ISSN: 2214-7853
Authors: D. Roopa, Vardhaman S. Mudakappanavar, R. Suresh, Tataram K. Chavan
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140.28-08-2021Effect of Nonlinear Edge Loads and Hybridization of FMLs on Buckling and Vibration Performance of Interlaminar composites with/without Cutouts.
Authors: Yathish Muddappa; T, Rajanna; G, Giridhara
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