International Journal of Engineering Research

K. Pavan Kumar ¹, B. Vinod Kumar ¹, P. Gopi ¹, K. Aruna ¹

Affiliations
1 Dept. of Mechanical Engineering, S.V.U. College of Engineering, Tirupati-517502, IN

Abstract

A spring is an elastic object which is used to store mechanical energy. It can be twisted, pulled or stretched by applying force and returns to its original shape upon release of force. In practice, the spring tends to buckling under the compressive load. Thus, the guiding components are usually used to constrain the buckling deflection, and the spring can continue to work in the normal situation. In these states, the deflection of the spring satisfies the small deformation assumption. This work is helpful in figuring out the behavior of post-buckling of the compressed helical spring. A typical locomotive suspension spring configuration is chosen for this study. This work is mainly concentrated on modeling and analysis of primary suspension spring (20NiCrMo₂) and comparing with the earlier conventional steel helical spring(Chrome Vanadium). The objective of this research is to reduce the overall stresses and deflections of the helical spring by using the new material. The buckling analyses of the locomotive suspension spring are performed using ANSYS 14.0 and compared with analytical results. The spring model is done by using Pro/E Wildfire 4.0.

Keywords

Locomotives, Primary Suspension System, Helical Spring, Modeling, Static Analysis, Ansys 14.0, Pro E-4.

Full Text

   

Gali Chiranjeevi Naidu ¹, K. Aruna ¹, K. Dharma Reddy ¹, P. V. Ramaiah ¹

Affiliations
1 Department of Mechanical Engineering, SV University College of Engineering, Tirupati, Andhra Pradesh, IN

Abstract

A Computational Fluid Dynamics (CFD) for thermal storage system by keeping Phase Change Material(PCM)in the capsules has been developed and validated with experimental results. The thermal energy storage tank was developed using capsules in a unique arrangement during the charging and discharging processes. Different shape of capsules have been used for Simulation of thermal storage system and analysisis carried out on the system. The CFD results confirmed the importance of mutual effects on the performance of thermal energy storage tank and showed that an appropriately designed storage tank can provide improved stratification conditions. The 3D transient CFD simulations can be used as an effective tool to optimise thermal storage tank parameters at early design stages, thus it may add to the value of the storage tank performance and efficiency, by optimising the whole solar thermal energy storage system design and size. This model endeavoured to describe both freeing and melting processes of PCM. Since the system is used for domestic application, the temperature of water is to be maintained at 60°C so for which Sodium thio sulfate pentahydrate(Na2S2O35H2O)are used as PCM in cylindrical tank with three types of capsules in this paper.

Keywords

Thermal Energy Storage Tank, Phase Change Material, Computational Fluid Dynamics (FLUENT).

Full Text