Department of Mechanical Engineering

Permanent URI for this collection

http://nits.ndl.gov.in/handle/123456789/72

Browse

Browsing Department of Mechanical Engineering by Title

Now showing 1 - 3 of 3
  • Thumbnail Image
    Item
    Comparative Fatigue Life Assessment of Beryllium Copper and Stainless-Steel Wave Spring for Automobile Suspension System
    (National Institute of Technology, Silchar, 2026) Fayaz, Mohammed
    Shock absorber springs are critical for mitigating kinetic energy in suspension systems.While wave springs offer a compact, lightweight alternative to traditional coil springs for space constrained applications, their sharp cross-sectional edges often cause higher stress concentrations. To address this, this study compares the performance of Beryllium Copper(C17200) and Stainless Steel(ASTM A313) wave springs under an ISO 8608 road profile using random vibration analysis. Evaluated the fatigue life through the Steinberg formulation and S-N approach, the Beryllium Copper(C17200) wave spring demonstrates an 15% improvement in fatigue life over the Stainless Steel (ASTM A313). And the BeCu(C17200) wave spring provides approximately 16% lower total life cycle cost than stainless steel(ASTM A313). These findings make an attempt to select the best material for automotive suspension system.
  • Thumbnail Image
    Item
    Green Hydrogen Production Using Nife-Ldh And Mwcnts Deposited On Nickel Foam For Enhanced Electrocatalytic Performance
    (Department of Mechanical Engineering, NITS, 2025) Bodo, Sneha
    The escalating concerns surrounding global warming, climate change and increasing the rate of pollution day-by-day are being worsened by the widespread dependency on traditional fossil fuels for energy generation. This reliance leads to the release of many harmful greenhouse gases and pollutants in the atmosphere. With the growing recognition of the urgent need to combat these environmental degradation, shifting to renewable energy sources is much preferable. Unlike fossil fuels, hydrogen can produce energy without emitting any pollutants making it a vital source to reduce the greenhouse gas emissions associated with conventional energy sources. In this research, a detailed study is being carried out on the production of green hydrogen through electrochemical-oxidation of bio alcohols process which represents a promising pathway for sustainable energy solutions. This project explores the use of nickel iron layered double hydroxides (NiFe-LDH) combined with multi-walled carbon nanotubes (MWCNTs) deposited on nickel foam to enhance the electrochemical performance of the electrolytic process. The synthesized NiFe-LDH/MWCNTs composite exhibits superior catalytic activity and stability, significantly improving hydrogen evolution reaction (HER) efficiency. The nickel foam substrate not only provides a conductive and porous support structure but also facilitates optimal dispersion of the active materials, maximizing surface area for reaction. Electrolytic experiments demonstrate that this composite achieves remarkable performance metrics, including low overpotential and high current density, surpassing traditional electrocatalysts. This innovative approach contributes to the advancement of efficient, cost-effective green hydrogen production technologies, with potential applications in renewable energy systems and sustainable hydrogen economies.
  • Thumbnail Image
    Item
    Numerical Investigation Of Spray And Combustion Of Gasoline And Diesel Engine Using Adaptive Mesh Refinement
    (Department of Mechanical Engineering, NITS, 2020) Barbhuiya, Suleman Hussain
    In recent years there has been growing requirement to develop more efficient engines and minimizing engine emissions in a shorter timescale. This is mainly due to increasing demand for fuel economy and tightening legislation for emissions. Computational Fluid Dynamics (CFD), as a rapid and cost effective tool, is being increasingly used in different stages of engine design and optimization. Internal-Combustion (IC) engine performance and emission characteristics are strongly determined by the complex interacting processes of in-cylinder flow, fuel spray injection and combustion. The combustion and spray process plays an important role in engine performance, emission and is therefore attracting great attention in CFD simulations. The complexity involved in IC engine combustion related to interaction of flow, turbulence and spray imposes a greater challenge in simulating combustion using CFD, whereas using CONVERGE software, these above issues can be tackled rapidly and accurately. CONVERGE utilizes the SAGE detailed chemistry solver for modeling the ignition and combustion processes. The present work considers the simulation of gasoline and diesel engine with the help of a CFD package, CONVERGE. Numerical simulation has been carried out to predict the spray breakup and combustion model using adaptive mess refinement (AMR).