Faculty Profile

About

I have been in the teaching field for past 13 years .Prior to that i have worked for NAL (2.6 years ) and TCS under airbus project. Currently Pursuing my Ph.D in BMSCE.

Education

• M.Tech - Design Engineering
  V T U
  Passed Year: 2008 | Program Type: FullTime
• B.E (Mechanical Engineering) - Mechanical Engineering
  V T U
  Passed Year: 2004 | Program Type: FullTime

Selected Publications

• Journal | Published On : 21-06-2024
  Rajesh P and Sharanabasavaraj J
  Title: Optimisation of finger seal pad design for reducing the leakage between the high-pressure and low-pressure region Abstract:The main objective of this work is to optimize the leakage flow between the rotor and pad region of the finger seal. To have a tapered pad surface in each finger laminate and create a pressure wedge configuration between the rotor and the pad of the finger seal, so that an opposing pressure is developed reduces leakage and controls the flow. The leakage flow variation for different taper angles was calculated along the axial direction and also effort was made to introduce taper in both the pad and rotor surface and the effect on the leakage is analysed. Simulation of leakage flow is carried out using a COMSOL Multi-physics software and the results are validated with the experimental results. An experimental study of leakage showed a very close pattern when compared to CFD Results obtained using Comsol multi-physics. The experimental study of a finger seal with a wedge height of 2mm showed a reduction of leakage by nearly 16% in comparison with the conventional seal, and a finger seal with a 1mm wedge showed a leakage reduction of 9%. The present work shows a substantial improvement in the performance of finger seals. The introduction of a wedge reduced the contact between the pad and rotor from surface contact to line contact, thus reducing the wear rate was almost zero. The finger seals are contactless seals due to the hydrodynamic lifting of flexible fingers which would accommodate the thermal expansion of the rotor and displacement of the rotor.
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• Conference | Published On : 02-11-2023
  Likith, Skandan, Rajesh P., and Madhav Murthy
  2nd Lincoln International HE Practices Conference, ISBN: 978-93-91355-87-6 (eBook) ABSTRACT The design of educational environments, particularly classrooms, is going through a radical change because of rising environmental concerns and an increased awareness of the need for sustainable practices. This abstract examines the idea of ecologically friendly and student-centred classroom designs with an emphasis on producing sustainable buildings. Sustainable classroom design integrates a few ideas and techniques that reduce the environmental impact of educational buildings while providing a more favourable learning environment. This abstract explores crucial facets of environmentally friendly classroom design, such as energy efficiency, materials choice, indoor air quality, and adaptable layouts. To decrease energy consumption and greenhouse gas emissions, energy eefficiency HVAC systems, enhanced insulation, and natural lighting are all included in classroom design. Utilizing renewable energy sources, such as solar panels, improves sustainability even further. To build sustainable classrooms, materials must be carefully chosen. Making the choice of eco-friendly and non-toxic products, such as low-VOC paints and sustainable wood, not only assures a better interior atmosphere but also helps to reduce resource depletion and waste. Promoting student well-being and cognitive performance requires excellent indoor air quality. Air quality in classrooms may be considerably improved by using air purifying plants and proper ventilation systems, which will result in a more relaxing and effective learning environment. Flexible classroom design enables rooms that may adapt to various teaching modalities and student demands. A dynamic learning environment that encourages cooperation, creativity, and invention may be created by educators using modular furniture and multipurpose spaces.
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• Conference | Published On : 02-11-2023
  Likith, Skandan, Rajesh P. and Madhav Murthy
  ISBN: 978-93-91355-87-6(eBook) ABSTRACT This research article aims to investigate and analyse the sustainability practices implemented by higher education institutions in Bengaluru, India. The study involves a comprehensive examination of multiple educational institutions in the region, utilizing in-depth interviews with key stakeholders to gain insights into their sustainability initiatives. Additionally, the article reviews existing literature to assess the progress made thus far in this domain. The research findings shed light on the current state of sustainability practices in higher education institutions in Bengaluru and identify areas for improvement. By examining successful case studies and drawing upon the experiences of these institutions, the article suggests effective methods for the implementation of sustainable initiatives. These recommendations aim to enhance the overall sustainability performance of higher education institutions in Bengaluru, fostering a culture of environmental responsibility and social consciousness. Overall, this research article contributes to the existing body of knowledge by providing a detailed analysis of sustainability practices in higher education institutions within the context of Bengaluru. The findings and recommendations presented in this study can serve as a valuable resource for educational administrators, policymakers, and other stakeholders interested in promoting sustainable development in the higher education sector. Keywords: Sustainable Practices, Higher Education Institution, Sustainable Education.
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• Journal | Published On : 28-02-2022
  Rajesh P,J Sharana Basavaraja
  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.
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• Journal | Published On : 28-02-2022
  Rajesh P,J Sharana Basavaraja
  Experimental 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.
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• Journal | Published On : 23-05-2018
  J Sharana Basavaraja, Aprameya C R, Rajesh P
  Study on Mass Flow Rate in Labyrinth Seal using CFD Analysis Abstract: The present study aims to understand the leakage flow rate parameter of labyrinth seals with respect to the different profiles and validation of leakage flow rate through experimental setup known as seal test rig for labyrinth seals. The different labyrinth seal profiles are designed using CATIA software and CFD analysis is performed to study the mass flow rate at inlet and outlet of the labyrinth seal, results in terms of pressure, velocity distribution profiles, pressure, velocity contours, turbulence dissipation rate, turbulence kinetic energy, velocity field are tabulated, studied to understand the mass flow rate through a labyrinth seal and study aims to conduct static analysis, modal analysis using ANSYS software & CFD analysis using COMSOL Multiphysics software. The results and observations are tabulated and compared to analyze the leakage flow rate of labyrinth seal for different configurations and design changes
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• Journal | Published On : 23-05-2018
  Hussain Pasha, K S Madhuchandra, Rajesh P, J Sharana Basavaraja
  Reinforcement Design and Crash Analysis of Medium Duty Trucks for Rollover Crash Accidents Abstract:-- Safety of the driver and other occupants of the medium duty trucks during the event of the crash is a vital consideration for Cab body in white design. According to the data released by NHTSA, there were 37,461 people killed in crashes in 2016 which is a 5.6% Increase as compared to the previous year [6]. In the past, most of the dynamic analysis were done by testing or contracted out. Now with the use of Computer simulation the dynamic analysis can be simulated to reflect real world testing. Virtual simulation in the computer provides opportunities to reduce development time and also reduces number of physical prototypes consumed for verification of the design and its validation for safety regulations. Among rear, front impact and rollover accidents, rollover accidents results in severe casualty for occupants. As per Regulation ECE-R29.03, the cab body of the medium duty truck shall be so designed and attached to the vehicle in such a way that in the event of crash it exhibits a sufficient survival space and eliminate the risk of injury for the occupants to the greatest possible extent. In this project, simulations are performed to verify various safety aspects to ensure crash worthiness using the nonlinear explicit finite element program ANSA and LS-DYNA[11] to the baseline model of the truck for rollover 180 case (which constitutes both side impact and roof crush) as per ECE-R29.03 and the intrusions are recorded. It is found that the Baseline Cab is failed for crash and there is a need for strengthening the cab by adding few reinforcements at different locations [5]. Now various Reinforcement concepts are developed and added to the Cab at the rear wall and roof and simulations were performed in the form of iterations and the results are obtained. These results are correlated with the Baseline crash results. Finally, it is found that the crash results have improved.
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