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 164 for “"Thermocouple"”.
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Materials for High Temperature Thin Film Thermocouple Applications
The thermocouple systems used for the measurement of surface temperature in high temperature applications such as advanced aerospace propulsion systems and diesel engine systems are expected to perform in rapidly fluctuating and extremely high heat fluxes corresponding to high temperatures (in …
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Application of thermocouple psychrometers to field measurements of soil moisture potential.
The recent development of the peltier-type thermocouple psychrometer has made possible the measurement of soil moisture potentials to values as low as -80 bars. The applicability of this type of psychrometer to "in situ" measurements of moisture potential at a Sonoran desert field site is …
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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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An Approach to Thermocouple Temperature Measurements that Reduces Uncertainties Associated with Radiative Corrections
… measurements in flame environments with thermocouples is extremely challenging due to the effects of radiative heat loss. These losses are difficult to quantify and often cannot be corrected for or minimized without sacrificing spatial resolution. In this work, a new experimental …
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The effect of aging and heat treatment on the stability of the chromel-constantan thermocouple
no abstract provided by author
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Experimental investigation of heat transfer characteristics of MITR-II fuel plates, in-channel thermocouple response and calibration.
Thesis. 1976. M.S.--Massachusetts Institute of Technology. Dept. of Nuclear Engineering.
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Computational Modeling of Radiation Effects on Total Temperature Probes
… applications was and remains to be the thermocouple. However, this sensor is characterized by errors due to conduction heat transfer from the sensing element, as well as errors associated with the flow over it. In particular in high temperature flows, the sensing element of the …
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Non-invasive Method to Measure Energy Flow Rate in a Pipe
… major components of the system are a thin-foil thermocouple, a heat flux sensor (PHFS), and a heater. To minimize the thermal contact resistance 𝑅" between the thermocouple thickness and the pipe surface, two thermocouples, welded and parallel, were tested together in the same set-up. Values of …
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Experimental Investigation of NexGen and Gas Burner for FAA Fire Test
… for the fire test. Calibrations of heat flux and thermocouple temperature from NexGen burner were much more sensitive to a change in the fuel flow rate as opposed to a change in air flow rate. However, the fire test results on the samples were also sensitive to air flow rate. It is recommended …
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Experimental Investigation of NexGen and Gas Burner for FAA Fire Test
… for the fire test. Calibrations of heat flux and thermocouple temperature from NexGen burner were much more sensitive to a change in the fuel flow rate as opposed to a change in air flow rate. However, the fire test results on the samples were also sensitive to air flow rate. It is recommended …
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Numerical Simulation of Microwave Sintering of Zinc Oxide
… of zinc oxide, particularly dielectric loss. Two thermocouple probes were used to measure the temperature response in a small cylindrical sample of zinc oxide packed in powder insulation, and heated in a microwave oven. In order to determine if the unusual response is caused by the dielectric …
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Analysis of Stresses in Metal Sheathed Thermocouples in High-Temperature, Hypersonic Flows
… demand robust and accurate sensing, making thermocouple sensors attractive. Even for these extremely well-developed sensors, the prediction of stresses (hoop, radial, and axial) within thermocouple sheaths for custom-configured probes remains a topic of great concern for ensuring adequate …
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An experimental and theoretical study of the cooling of a thin glass fiber during the formation process
… a temperature measurement subsystem, and a thermocouple temperature control subsystem. A heated thermocouple technique was adopted to measure the temperature distribution of the glass fiber along its drawing direction. Data were collected for diameters ranging from 20 to 50 micrometers and …
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Fibre Bragg grating temperature sensors for high-speed machining applications
… within the workpiece. Present techniques are thermocouple based, and often suffer from excessive electrical noise on the signal. This thesis presents a number of novel and existing optical sensing devices that overcome this limitation and also, in some cases, offer greater performance. The …
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Improvement In the Measurement and Control of Glass Melt Temperature of High Strength, Continuous Glass Fiber
… integral thermal well that allowed access for a thermocouple or infrared sensor to read under glass temperature. Both sensor types were tested and the thermal well / thermocouple design was selected for a production trial. Differences in the temperature values were found between the standard …
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An Investigation of Heat Transfer to the Implant-Bone Interface and Marginal Gingiva During Preparation of Implant Abutments in the Mouth: in vitro study
… connection) implant fixture were used and thermocouple wire was attached to the cervical, middle and apex of the machined surface. Cemented, Solid and ZirAceTM Abutment were connected with these fixture. Each abutment was prepared with high and low speed handpiece during 30 seconds. The …
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Infrared imaging: a proposed validation technique for computational fluid dynamics codes used in STOVL applications
… band as well as conventional pitot tube and thermocouple methods. These infrared images are compared to computer-generated images using the equations of radiative exchange based on the temperature distribution in the jet exhaust measured with the thermocouple traverses. Temperature and …
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Autoregulation of Cortical Blood Flow in Response to Phenylephrine Induced Hypertension in the Normocapnic and Hypercapnic Cat
… and to evaluate the usefulness of the heated thermocouple technique for measurement of local cortical blood flow. We determined the relationship between local flow and voltage output from our thermoelectric flow probe by in vitro experiments with an artificial kidney. We measured local …
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Convective heat flux determination using surface temperature history measurements and an inverse calculation method
… proposed in this study is to install a coaxial thermocouple into an existing skin friction gage to measure the unsteady temperature on the surface of the gage. By using the temperature history and a computer program the heat flux through the surface can be obtained through an iterative guessing …
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