Global ETD Search
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Showing 1 to 20 of 37 for “"transient heat transfer"”.
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Modelling of transient heat transfer in annealing furnaces
This is a study of heat transfer in a lift-off furnace which is employed in the batch annealing of a stack of coils of steel strip. The objective of the project is to investigate the various factors which govern the furnace design and the heat transfer resistances, so as to reduce the time of the …
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Transient heat transfer properties in a pulse detonation combustor
The heat transfer along the axis of a pulse detonation combustor has been characterized for various frequencies and fill fractions at 2.5 atmospheres of pressure for chamber refresh conditions. In a pulse detonation combustor, a supersonic detonation wave is the method for transforming chemical …
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Hydrodynamics and Transient Heat Transfer Characteristics in Fluidized and Spouted Beds
Hydrodynamics and heat transfer characteristics found in fluidization were studied in a small scale laboratory fluidized bed. Experiments were designed to capture field data on multiple slit jet gas distributor systems for the validation of computational models. Localized data was quantified …
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Transient heat transfer analysis of heat exchangers in a Marnoch Heat Engine
The Marnoch heat engine (MHE) is a new type of power generation device that is under research and development at the University of Ontario Institute of Technology. In this thesis, the transient heat transfer behaviour of the source heat exchanger of the Marnoch heat engine is studied, and its …
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A Model of Transient Heat Transfer in a Packed Bed of Alumina Particles
… study seeks to develop a robust system-scale heat transfer model for a sensible heat storage system. A novel mechanism to simulate axial dispersion and heat loss from the boundary of the sensible heat system to the environment is introduced. The most challenging topics to develop a robust heat …
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Two investigations of compressor stability : spike stall inception and transient heat transfer effects
… The second investigation is of the effects of heat transfer between the compressor structure and gas path during transient operation. A mean line model of an advanced, high pressure ratio compressor is extended to include the effects of heat transfer. Diabatic, transient calculations show a 9.9 …
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Transient-heat-transfer and stress analysis of a thermal-storage solar cooker module
… solar cooker utilizes the high-latent-heat lithium nitrate releases when transitioning from liquid to solid state.However,before this process can transpire the salt has to be completely melted and the energy needed for the melting process is provided by the sun.The purpose of the module …
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Theory of transient heat transfer in laminar flow, applied to the entrance region of tubes with heat capacity
Thesis (Sc. D.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1958.
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Métodos de redução de base para problemas térmicos em regime transiente com condições de contorno de radiação e convecção
… been a renewed interest in reduction methods for transient heat transfer analysis. Particularly, for transient heat conduction, it has been shown that reduction methods based on Lanczos-type algorithms or Ritz methods are most effective than the usual direct approach (α-methods) or classical modal …
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Three-dimensional transient thermo-elasto-plastic modeling of gas metal arc welding using the finite element method
… (GMAW), a three-dimensional finite element transient heat transfer model has been developed for the autogenous Gas Tungsten Arc Welding (GTAW) process which does not require the complicated metal transfer modeling. A mathematical model to calculate arc heat input when the welding torch is …
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Lorentz force actuator and carbon fiber co-winding design, construction and characterization
… is lighter by 3.75 ± 0.155 grams, increases the transient heat transfer by 15.7 %, is 2.18 ± 0.13 times stiffer, and can survive a higher compressive force than the conventional plastic bobbin.
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Higher order approximation for combined mode heat transfer in building insulations
For heat transfer through building insulations such as fiberglass, radiation and conduction are important modes of heat transfer. Moreover, materials like fiberglass scatter radiation in a highly anisotropic manner. The equations for heat transfer by simultaneous conduction and radiation are a …
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A heat transfer model applicable to the refuelling process for natural gas vehicles
This research presents a study of transient heat transfer phenomena taking place between a storage cylinder and the incoming gas during the cylinder charging process. A theoretical model of convective heat transfer between the gas and the cylinder is described. Experiments with the high pressure …
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A transient heat probe sensor for measuring transpiration in the stem of woody plants.
… of woody plants. This system utilizes a single heated thermistor probe which is alternately and automatically switched between a constant (heating phase) and a variable (cooling phase) temperature mode of operation. Experiments reported here have been carried out in two distinct porous medium, …
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Transient thermo-fluid model of meniscus behavior and slag consumption in steel continuous casting
… region has been developed, that includes transient heat transfer, multi-phase fluid flow, solidification of the slag, and movement of the mold during an oscillation cycle. First, the model is applied to a lab experiment done with a “mold simulator” to verify the transient temperature-field …
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Removing Oil from Fried Foods via Mechanical Process
… Solver (EES) was used to aid steady state and transient heat transfer calculations. Minitab was used for statistical analysis. The impact of various parameters on the change in mass of the French fries, as a measure for evaluating the oil content, were studied. The results indicate whether a …
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Thermal performance of a room with wall latent heat storage
… data acquisition and control system for transient thermal measurements. An explicit finite difference model was developed to simulate the transient heat transfer process in the walls with PCM gypsum board as inside lining. The model takes into account the transient boundary conditions, …
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Numerical modelling of the tilt casting processes of titanium alumindes
… a long blade, up to 40 cm, due to the low superheat provided by the Induction Skull Melting (ISM) furnace which is widely used to melt the alloys. Here computational simulation has been seen important to predict the casting defects and to help optimise the experimental process. Computational …
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The effect of abrasive properties on the surface integrity of ground ferrous materials.
… the accuracy of theoretical predictions of the heat conduction in CBN grinding. A grain contact analysis was developed to predict the energy partitioning between the workpiece and wheel. The analysis takes into account two dimensional transient heat transfer in the grain and maintains …
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TRANSIENT MODELING OF TWO-STAGE AND VARIABLE REFRIGERANT FLOW VAPOR COMPRESSION SYSTEMS WITH FROSTING AND DEFROSTING
… of an advanced modeling framework for the transient simulation of vapor compression systems. This framework contains a wide range of components and its modular nature enables an arbitrary cycle configuration to be analyzed. One of the highlights of this framework is the first-principles …
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