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229 results on '"Vengadesan, S."'

2. Parametric Modelling, Analysis and Design of Compact Diffuser for Heat Exchanger

Author

Mittal, Kumud, Saravana Kumar, G., Arul Prakash, K., Jayanti, Sreenivas, Vengadesan, S., Cavas-Martínez, Francisco, Editorial Board Member, Chaari, Fakher, Series Editor, di Mare, Francesca, Editorial Board Member, Gherardini, Francesco, Series Editor, Haddar, Mohamed, Editorial Board Member, Ivanov, Vitalii, Series Editor, Kwon, Young W., Editorial Board Member, Trojanowska, Justyna, Editorial Board Member, Pradeep Pratapa, P., editor, Saravana Kumar, G., editor, Ramu, Palaniappan, editor, and Amit, R. K., editor

Published
2023
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11. Study of Hybrid LES/RANS Models in OpenFOAM Applied to Taylor–Couette Flow

Author

Jakkala, Sai Guruprasad, Vengadesan, S., Cavas-Martínez, Francisco, Series Editor, Chaari, Fakher, Series Editor, Gherardini, Francesco, Series Editor, Haddar, Mohamed, Series Editor, Ivanov, Vitalii, Series Editor, Kwon, Young W., Series Editor, Trojanowska, Justyna, Series Editor, di Mare, Francesca, Series Editor, Prabu, T., editor, Viswanathan, P., editor, Agrawal, Amit, editor, and Banerjee, Jyotirmay, editor

Published
2021
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12. 3D Computational Studies of Flapping Wing in Frontal Gusty Shear Flow

Author

De Manabendra, M., Mathur, J. S., Vengadesan, S., Cavas-Martínez, Francisco, Series Editor, Chaari, Fakher, Series Editor, Gherardini, Francesco, Series Editor, Haddar, Mohamed, Series Editor, Ivanov, Vitalii, Series Editor, Kwon, Young W., Series Editor, Trojanowska, Justyna, Series Editor, Kumar, S. Kishore, editor, Narayanaswamy, Indira, editor, and Ramesh, V., editor

Published
2021
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31. Investigation and Optimization of Piston with Different Compositions in Existent Combustion Circumstance

Author

null V. Karthikeyan, null Vengadesan. S, null Kabilan. K. K, and null Vijay. S

Abstract

This Project is to improve the compression ratio in particular in Diesel Engine and reduce heat rejection in cylinders. It is acquired by changing the material property by composition. Thermal barrier coatings have been applied to the internal combustion engine in the combustion chamber for simulating adiabatic changes. It is not only for reduction of heat rejection in-cylinder and thermal fatigue protection of underlying metallic surfaces, but it also for reduction of engine emissions and brake specific fuel consumption. Thermal Barrier Coatings (TBCs) in diesel engines lead to higher power density, fuel efficiency, and multifuel capacity due to higher combustion chamber temperature Using TBC can increase engine power. The application of TBC in the components is to enhance high temperature durability by reducing the heat transfer and lowering temperature of the underlying metal.

Published
2022

37. Experimental study on the effect of throat length in the dynamics of internal unsteady cavitating flow.

Author

Ullas, P. K., Chatterjee, Dhiman, and Vengadesan, S.

Subjects
CAVITATION, UNSTEADY flow, PROPER orthogonal decomposition, BOUNDARY layer (Aerodynamics), THROAT, TURBULENT flow, ROTATIONAL motion
Abstract

Cloud cavitation, both in external and internal flow fields, has been an active field of research because of its different harmful effects, such as noise, vibration, and material damage, in several applications. In the present work, the same is studied experimentally using venturi geometries. Venturi geometry was selected because of its diverse applications. The two venturi geometries chosen are nearly identical in all respect except the throat length. The influence of throat length is examined in this study because previously, these two venturi geometries (with and without throat) produced contradictory results in terms of the underlying mechanisms of cavity shedding, namely, re-entrant jets and condensation shocks observed at different cavitation numbers. Different diagnostic strategies were adopted to characterize cavitation events, viz., sound pressure level, dynamic pressure fluctuations, and high-speed imaging. High-speed images were studied to obtain mean cavity length. Proper orthogonal decomposition along with wavelet analysis was also employed. From these analyses, it was shown that for the venturi with 23 mm throat length, the condensation shock is followed by the re-entrant jet as cavitation number is reduced, while reverse is seen for venturi with zero throat length. Simulations of unsteady, non-cavitating, turbulent flow through these venturis show that this difference in the order of predominance of the two mechanisms can be explained by the product of cavity thickness (approximated by boundary layer height) and average pressure gradient value. [ABSTRACT FROM AUTHOR]

Published
2023
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