Browsing by Author "Damodaran, V."

Filter results by typing the first few letters
Now showing 1 - 5 of 5
  • No Thumbnail Available
    Item
    CFD and experimental optimization of formula SAE race car cooling air duct
    (2013) Kamath, S.R.; Prajwal, Kumar, M.P.; Shashank, S.N.; Damodaran, V.; Anand, S.R.; Kulkarni, P.
    Engine overheating problems have been the major cause for vehicle breakdown during FSAE endurance runs. Therefore, it is crucial to study the cooling performance, which is affected by the air flow through the side-pod. CFD is used as a tool for this study and simulation based on the complete race car 3D model (NITK Racing 2012 formula student race car - NR XII) is carried out for different cases. Further, Wind Tunnel Experiment is carried out to validate these results. The results obtained for different cases are analyzed to decide the best configuration of the cooling duct. CFD analysis helped in calculating the mass flow rate through the radiator at various velocities. Pressure distribution and velocity distribution were also obtained along the length of the side-pod for different velocities of the car. Area of flow separation and turbulence is visualized and thus smooth airflow into the radiator core area is ensured. The amount of drag force generated due to the side-pod geometry and radiator configuration is also measured. This significantly increased the heat rejection and reduced drag. Copyright � 2013 SAE International.
  • No Thumbnail Available
    Item
    CFD and experimental optimization of formula SAE race car cooling air duct
    (SAE International, 2013) Kamath, S.R.; Prajwal Kumar, M.P.; Shashank, S.N.; Damodaran, V.; Anand, S.R.; Kulkarni, P.
    Engine overheating problems have been the major cause for vehicle breakdown during FSAE endurance runs. Therefore, it is crucial to study the cooling performance, which is affected by the air flow through the side-pod. CFD is used as a tool for this study and simulation based on the complete race car 3D model (NITK Racing 2012 formula student race car - NR XII) is carried out for different cases. Further, Wind Tunnel Experiment is carried out to validate these results. The results obtained for different cases are analyzed to decide the best configuration of the cooling duct. CFD analysis helped in calculating the mass flow rate through the radiator at various velocities. Pressure distribution and velocity distribution were also obtained along the length of the side-pod for different velocities of the car. Area of flow separation and turbulence is visualized and thus smooth airflow into the radiator core area is ensured. The amount of drag force generated due to the side-pod geometry and radiator configuration is also measured. This significantly increased the heat rejection and reduced drag. Copyright © 2013 SAE International.
  • No Thumbnail Available
    Item
    Dynamic impact behavior of syntactic foam core sandwich composites
    (2018) Breunig, P.; Damodaran, V.; Shahapurkar, K.; Waddar, S.; Doddamani, M.; Jeyaraj, P.; Mohankumar, G.C.; Prabhakar, P.
    Sandwich composites and syntactic foams have historically been used in many engineering applications to meet the needs of a system. However, there has been minimal effort to take advantage of the weight saving ability of syntactic foams in the cores of sandwich composites, especially with respect to the impact response of the structure. The goal of this experimental study is to investigate the mechanical response and damage mechanisms associated with sandwich composites with syntactic foam cores. The core was manufactured using epoxy resin as the matrix and cenospheres as the reinforcement with varying volume fractions of 0%, 20%, 40%, and 60%. The sandwich composites were manufactured with the vacuum assisted resin transfer molding (VARTM) process. Impact tests were performed on the specimens according to ASTM D7766 at two energy levels: 80J and 160J. The data from the tests was post-processed to gain quantitative understanding of the damage mechanisms present in the specimens. A qualitative understanding was obtained through MicroCT scanning imaging. The analysis showed that increasing the volume fraction of cenospheres in the syntactic foam made the damage mechanism more desirable, even at high energy levels. � 2018 by DEStech Publications, Inc. All rights reserved..
  • No Thumbnail Available
    Item
    Dynamic impact behavior of syntactic foam core sandwich composites
    (SAGE Publications Ltd info@sagepub.co.uk, 2020) Breunig, P.; Damodaran, V.; Shahapurkar, K.; Waddar, S.; Doddamani, M.; Jeyaraj, J.; Prabhakar, P.
    Sandwich composites and syntactic foams independently have been used in many engineering applications. However, there has been minimal effort towards taking advantage of the weight saving ability of syntactic foams in the cores of sandwich composites, especially with respect to the impact response of structures. To that end, the goal of this study is to investigate the mechanical response and damage mechanisms associated with syntactic foam core sandwich composites subjected to dynamic impact loading. In particular, this study investigates the influence of varying cenosphere volume fraction in syntactic foam core sandwich composites subjected to varying dynamic impact loading and further elucidates the extent and diversity of corresponding damage mechanisms. The syntactic foam cores are first fabricated using epoxy resin as the matrix and cenospheres as the reinforcement with four cenosphere volume fractions of 0% (pure epoxy), 20%, 40%, and 60%. The sandwich composite panels are then manufactured using the vacuum assisted resin transfer molding process with carbon fiber/vinyl ester facesheets. Dynamic impact tests are performed on the sandwich composite specimens at two energy levels of 80 J and 160 J, upon which the data are post-processed to gain a quantitative understanding of the impact response and damage mechanisms incurred by the specimens. A qualitative understanding is obtained through micro-computed tomography scanning of the impacted specimens. In addition, a finite element model is developed to investigate the causes for different damage mechanisms observed in specimens with different volume fractions. © The Author(s) 2019.
  • No Thumbnail Available
    Item
    Dynamic impact behavior of syntactic foam core sandwich composites
    (DEStech Publications Inc. info@destechpub.com, 2018) Breunig, P.; Damodaran, V.; Shahapurkar, K.; Waddar, S.; Doddamani, M.; Jeyaraj, P.; Mohan Kumar, G.C.M.; Prabhakar, P.
    Sandwich composites and syntactic foams have historically been used in many engineering applications to meet the needs of a system. However, there has been minimal effort to take advantage of the weight saving ability of syntactic foams in the cores of sandwich composites, especially with respect to the impact response of the structure. The goal of this experimental study is to investigate the mechanical response and damage mechanisms associated with sandwich composites with syntactic foam cores. The core was manufactured using epoxy resin as the matrix and cenospheres as the reinforcement with varying volume fractions of 0%, 20%, 40%, and 60%. The sandwich composites were manufactured with the vacuum assisted resin transfer molding (VARTM) process. Impact tests were performed on the specimens according to ASTM D7766 at two energy levels: 80J and 160J. The data from the tests was post-processed to gain quantitative understanding of the damage mechanisms present in the specimens. A qualitative understanding was obtained through MicroCT scanning imaging. The analysis showed that increasing the volume fraction of cenospheres in the syntactic foam made the damage mechanism more desirable, even at high energy levels. © 2018 by DEStech Publications, Inc. All rights reserved..