Author
Thundil Karuppa Raj Rajagopal
Bio: Thundil Karuppa Raj Rajagopal is an academic researcher from VIT University. The author has contributed to research in topics: Diesel fuel & Diesel engine. The author has an hindex of 5, co-authored 17 publications receiving 113 citations.
Topics: Diesel fuel, Diesel engine, Heat transfer, Biofuel, Combustion
Papers
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TL;DR: In this article, a three-dimensional computational fluid dynamics (CFD) investigation of the friction and heat transfer characteristics of a fin tube heat exchanger having elliptical tubes of various ellipticity ratio and orientation of these tubes to the horizontal are analyzed.
48 citations
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TL;DR: In this article, a novel sinuous flow field was proposed to address water lodging at cathode (a scaling issue) by scaling up of PEMFC from 25 cm2 to 100 cm2.
48 citations
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TL;DR: In this paper, a single-cylinder high speed automotive diesel engine for the ethanol blended biodiesel fuel (B5E20) was tested and the results showed a significant loss in maximum brake power and maximum brake torque at the end of 500h durability run when the engine was fuelled with B5E 20.
40 citations
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14 citations
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TL;DR: In this paper, Horivert baffles, a combination of horizontal and vertical baffles that are placed at the variable mass region of the tank were considered for the sloshing analysis.
Abstract: The sloshing phenomenon is predominant in partially filled tanks with fluids, which are under external excitation. Studies have been conducted by placing the vertical baffle in the fixed mass region and horizontal baffle in the variable mass region in the partially filled fluid tanks. In this study, Horivert baffles, a combination of horizontal and vertical baffles that are placed at the variable mass region of the tank were considered for the sloshing analysis. Water and air were the multiphase fluids in the fluid domain under consideration. The tanks with horivert baffle with slot configurations filled with 100 mm, 200 mm, and 300 mm of water were considered in this numerical study. The tank was excited with sinusoidal motion with excitation amplitude of 20 mm and frequency depending on the fill level of water in the tank. Numerical simulation results were validated with the outcomes of the experiment. The pressure, velocity, shear strain of water, and maximum elevation of water in the tank were the key parameters of investigation in this study. The baffled tank with slot configuration was proved to be efficient in the suppression of sloshing along with the free flow of fluid in the tank under consideration.
12 citations
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TL;DR: In this article, the authors provide a comprehensive review of major findings of researches on modeling, flow field design, materials, and fabricating process of bipolar plate in recent year and provide the guidance for the future development of bipolar plates.
69 citations
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TL;DR: In this paper, the influence of MgO-MWCNT/ethylene glycol hybrid nanofluids on performances of elliptical tube was investigated for steady, three-dimensional and laminar flow.
55 citations
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TL;DR: In this paper, the effect of nanoparticle concentration on reduction of coolant requirement, pumping power and operating cost has been investigated in a shell and tube condenser of a 580MW nuclear power plant.
54 citations
01 Jan 1982
TL;DR: In this article, a multidimensional, thermal-hydraulic model is developed for the analysis of shell-and-tube heat exchanges for liquid metal services, where the conservation equations of mass, momentum and energy for continuum fluids are modified using the concept of porosity, surface premeability and distributed resistance to account for the blockage effects due to the presence of heat transfer tubes.
Abstract: A comprehensive, multidimensional, thermal-hydraulic model is developed for the analysis of shell-and-tube heat exchanges for liquid metal services. For the shellside fluid, the conservation equations of mass, momentum and energy for continuum fluids are modified using the concept of porosity, surface premeability and distributed resistance to account for the blockage effects due to the presence of heat transfer tubes, flow baffles/shrouds, the support plates, etc. On the tubeside, heat transfer tubes are connected in parallel between the inlet and outlet plenums, and tubeside flow distribution is calculated based on the plenum-to-plenum pressure difference being equal for all tubes. It is assumed that the fluid remains single-phased on the shell side and may undergo phase-change in the tube side, thereby simulating the conditions of Liquid Metal Fast Breeder Reaction (LMFBR) intermediate heat exchanges (IHX) and steam generators (SG). The analytical model predictions are compared with three sets of test data (one for IHX and two for SG) and favorable results are obtained, thus providing a limited validation of the model.
54 citations
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TL;DR: In this article, the authors used n-octanol and diethyl ether as cosolvents and ignition improvers to improve the usability of methanol in diesel engines.
50 citations