Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 160 for “"Thermocouples"”.
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Accuracy life of fine wire chromel-alumel thermocouples
Thesis (M.S.) Massachusetts Institute of Technology. Dept. of Mechanical Engineering, 1948.
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Analysis of Stresses in Metal Sheathed Thermocouples in High-Temperature, Hypersonic Flows
… [6] and the new structural low-order model for thermocouples was developed. This code is capable of solving a highly generalized version of the 1-D pin fin equation, allowing for the solution of the temperature distribution in a sensor taking into account conduction, convection, and radiation …
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An evaluation of the use of thermocouples for gas temperature determination in an I.C. engine environment
The magnitude and transient nature of the gas temperature in the cylinder of an internal combustion engine makes the measurement quite difficult. Several techniques have been employed to try and determine the actual gas temperatures in internal combustion engines, and most of these have either …
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The design of an experiment to investigate in-channel thermocouples, heat transfer co-efficient, and fin effectiveness for the MITR-II fuel plates.
Massachusetts Institute of Technology. Dept. of Mechanical Engineering. Thesis. 1974. B.S.
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A dual-junction thermocouple probe for compensated temperature measurement in reacting flows
… The system under study uses the responses of two thermocouples of different sizes placed in close proximity in order to determine instantaneous temperatures. This is in contrast to previous work in which compensation is performed on a single thermocouple junction in order to correct for the error …
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Measurement of Window Glass Temperature With a Fluorescence Intensity Ratio Optical Fibre Sensor
… between the intrinsic optical fibre sensor and thermocouples (the conventional temperature measuring device used in fire research). Neodymium doped fibre was used as the temperature sensing element. Due to the destructive nature of the fire tests on the neodymium doped fibre, a new section of …
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Application of Optical Fiber Sensors for Quenching Temperature Measurement
… measurement, where experiments typically utilize thermocouples for temperature data acquisition. As a result of technological advancement in the field of fiber optics, it is possible to measure the quenching temperature to a much higher degree of precision. Optical fiber sensors are capable of …
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Parametric Studies Based Mechanical and Thermal Modelling of Spot Welded Joints
… history of a spot welded joints using remote thermocouples. This method incorporated the experimental data into an Artificial Neural Network (AAN) to predict cooling curves of the HAZ. Advanced modelling programs have been developed to simulate spot welded joints and thermocouples. Using the …
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Modeling and Experimental Investigation of Parabolic Trough Solar Collector
… a heat exchanger (radiator), and flow meter. Thermocouples were used to measure the inlet and outlet temperature of PTSC (the second trough). Water is used as a working fluid. After data were recorded, thermal performance analysis was performed. The results indicate that a maximum temperature …
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Materials for High Temperature Thin Film Thermocouple Applications
… flows. Traditionally, Pt/Pt-Rh based thin film thermocouples have been used for surface temperature measurements. However, recent studies indicated several problems associated with these thermocouples at temperatures exceeding 1000 K, some of which include poor adhesion to the substrate, rhodium …
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Application of thin film PRTD's for the monitoring of cutting tool temperature during turning
… with a variety of techniques, from work-tool thermocouples to embedded thermocouples to infrared radiation technology. However, these methods are not durable and robust enough to provide quick, accurate results from a production environment. The objective of this research work was, therefore …
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Energy loss to the soil surrounding a below-grade solar energy storage pond
… pond was more thoroughly instrumented with thermocouples than were the other three ponds. These thermocouples provided data that were used as input to the computer model as well as data to verify the model. Based on the conditions under which the model was tested, energy losses to the soil …
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Modelling and Measurements on a Condensing Counter-Flow Heat Exchanger
… and folded into 0.5 metre straight sections. Thermocouples were inserted in both pipes at one metre intervals and transducers for pressure and flow measurement were also included. Data acquisition, storage and analysis was carried out by a micro-computer suitably interfaced with the …
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Experimental surface heat flux measurement in hypervelocity flows
… used in order to measure surface heat transfer, thermocouples and thin film gages. This thesis details the development and application of thermocouples and thin film surface heat transfer gages in the HET. These gages have been extensively used in other hypersonic facilities, but their …
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Non-invasive Method to Measure Energy Flow Rate in a Pipe
… thermocouple thickness and the pipe surface, two thermocouples, welded and parallel, were tested together in the same set-up. Values of heat transfer coefficient ℎ, thermal contact resistance 𝑅", time constant 𝜏, and the water temperature °C, were determined by using a parameter estimation code …
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Desing of the high Pressure HIgh temperature annuLUS flow (PHILUS) Facility
… rod surface measurements were collected with thermocouples to measure CHF location and temperature excursion, yet thermocouples provide limited spatial resolution, which leads to significant uncertainties in the CHF prediction. On the other hand, optical fiber temperature sensors can measure …
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Natural convection liquid immersion cooling of a column of discrete heat sources in a vertical channel.
… were measured at five locations using embedded thermocouples. The resulting steady state data was compared with corresponding measurements for an identical geometric arrangement of protruding heat sources. The flow visualization was carried out using a laser generated plane of light.
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Thermal properties of combustion chamber deposits and their effect on engine heat transfer and octane requirement increase
… and conductivity were measured with high speed thermocouples and steady and flash laser techniques.
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O estudo da temperatura em revestimentos betuminosos
… is made of the field work, equipment (thermocouples and authomatic register) used, and results obtained after several months. From the data analysis it is confirmed the importance of temperature effects and the need for temperature being taken into account in deflection measurements. …
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