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 141 for “"surface heat"”.
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Unsteady surface heat flux and temperature measurements
A fast response thin-film heat flux sensor was used to measure the time-resolved surface heat flux and temperature from a turbulent combustion flame impinging on a surface. Using the analytical semi-infinite conduction model, the unsteady surface heat flux was calculated from the transient …
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Experimental surface heat flux measurement in hypervelocity flows
Prediction of heat transfer is integral to development of hypersonic vehicles. Underprediction of heat transfer rates can result in catastrophic failures during flight testing. An example which illustrates the importance of heat transfer during hypersonic flight is the destruction of the space …
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Extended Surface Heat Transfer Coefficients via Endwall Temperature Measurements
… the experimental process used to obtain average heat transfer data on the pin surface, at the expense of additional post processing complexity. The method is based on a unique, analytical solution of the longitudinal conduction equation with internal heat generation, allowing computation of heat …
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Surface heat fluxes and MJO propagation through the Maritime Continent
… of their propagation characteristics. Latent heat flux from CYGNSS and OAFLUX as well as CYGNSS surface winds are used to compare large-scale patterns for MJO events that do and do not propagate through the MC. Local area-averaged surface fluxes and OLR anomalies are 7-14% and 18-22% of the …
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The sea surface heat balance in the Benguela upwelling region
The surface heat balance of the Benguela upwelling area on the west coast of southern Africa is analysed. Measurements of the components of the heat balance were made in the St Helena Bay area from 14-21 October 1986. Additional long-term data was obtained from Alexander Bay and Cape Town. An …
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Near-wall reaction effects on film-cooled surface heat transfer
… ratios, there exists a potential for significant heat release to occur in the turbine if energetic species emitted from the combustor are further oxidized during interaction with film-cooling flows. Currently there is little basis for understanding the effects on aero-performance and durability …
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Heat Transfer and Thermal Process Design in Scraped-Surface Heat Exchangers
Performance and heat transfer characteristics of a scraped-surface heat exchanger (SSHE) for use in ultra-high temperature processing of low-acid liquid foods was evaluated using a Contherm 6 x 2 pilot-scale unit. Independent variables tested were steam pressure, blades rotational speed, inlet
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Surface heat flow and lithospheric thermal structure of the northwestern Arabian Plate
The surface heat flow (qs) is paramount for modeling the thermal structure of the lithosphere. Changes in the qs over a distinct lithospheric unit are normally directly reflecting changes in the crustal composition and therewith the radiogenic heat budget (e.g., Rudnick et al., 1998; Förster and …
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Estimation of turbulent surface heat fluxes using sequences of remotely sensed land surface temperature
Fluxes of heat and moisture at the land-surface play a significant role in the climate system. These fluxes interact with the overlying atmosphere and influence the characteristics of the planetary boundary layer (e.g. temperature and water vapor content), ultimately influencing the presence and …
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The simultaneous measurement of time-resolved surface heat flux and freestream turbulence at a stagnation point
Two rapid-response thin-film heat flux gage systems have been used to measure time-resolved unsteady heat transfer signals. The Heat Flux Microsensor is a passive gage which measures the temperature difference across a thin thermal resistance. The second sensor, an actively powered gage operated by …
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A frequency domain analysis of surface heat transfer/free-stream turbulence interactions in a transonic turbine cascade
The relationship of time-resolved surface heat flux to the turbulent free-stream flow over a turbine blade is investigated. Measurements are made in a transonic linear cascade with a modem high pressure turbine blade profile. Time-resolved direct heat transfer measurements are made with Heat Flux …
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The quenching characteristics of sodium polyacrylate solutions.
… with increasing concentration. The maximum surface heat transfer coefficients were significantly below those recorded in water or polyalkylene glycol solutions and decreased with increasing concentration. Just after the passage of this maximum the surface heat transfer coefficient declined …
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Geothermal regime of the Williston Basin in North Dakota
… analysis of the relationships among radiogenic heat production, surface heat flow, formation temperatures, and gravity and magnetic anomaly patterns. Digital processing of the spatial and causal relationships gives insight into the effect of basement heat production on the thermal state of the …
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A Bayesian Reappraisal of Australian Crustal Heat Flow and Temperature
… the Bayesian re-appraisal of Australian crustal heat flow and temperature data. This has been achieved by defining sensitivity kernels for surface heat flow determinations, examining the sources and magnitudes of noise in primary geothermal data sets, and developing methods to assign …
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A Bayesian Reappraisal of Australian Crustal Heat Flow and Temperature
… the Bayesian re-appraisal of Australian crustal heat flow and temperature data. This has been achieved by defining sensitivity kernels for surface heat flow determinations, examining the sources and magnitudes of noise in primary geothermal data sets, and developing methods to assign …
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Time-resolved heat flux measurements of the turbulent junction vortex system
A rapid-response thin-film heat flux sensor was used to measure time-resolved unsteady heat flux in a complex junction vortex flow. This sensor, called the Heat Flux Microsensor, was used with a hot-wire anemometer to make simultaneous measurements of velocity and surface heat flux. The results …
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Effects of Freestream Turbulence, Turbulence Length Scale, and Reynolds Number on Turbine Blade Heat Transfer in a Transonic Cascade
… length scale, and exit Reynolds number on the surface heat transfer distribution of a turbine blade at realistic engine Mach numbers. Passive turbulence grids were used to generate freestream turbulence levels of 2%, 12%, and 14% at the cascade inlet. The turbulence grids produced length scales …
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The upper ocean response to the monsoon in the Arabian Sea
Estimation of the upper ocean heat budget from one year of observations at a moored array in the north central Arabian Sea shows a rough balance between the horizontal advection and time change in heat when the one-dimensional balance between the surface heat flux and oceanic heat content breaks …
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The upper ocean response to the monsoon in the Arabian Sea
Estimation of the upper ocean heat budget from one year of observations at a moored array in the north central Arabian Sea shows a rough balance between the horizontal advection and time change in heat when the one-dimensional balance between the surface heat flux and oceanic heat content breaks …
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