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.
Results
Showing 1 to 13 of 13 for “"heat flux sensors"”.
-
Development of a Novel, Manufacturing Method of Producing Cost-Effective Thin-Film Heat Flux Sensors
A new method of manufacturing heat flux sensors was developed using a combination of copper etching and stencil printing nickel/silver conductive ink thermocouple materials onto a thin-film polyimide Kapton® substrate. The semi-automated production capabilities of this manufacturing process …
-
The Physical Mechanism of Heat Transfer Augmentation in Stagnating Flows Subject to Freestream Turbulence and Related Studies
The mechanism of heat transfer augmentation due to freestream turbulence in classic Hiemenz stagnation flow was studied experimentally for the first time using time-resolved digital particle image velocimetry (TRDPIV) and a new thin film heat flux sensor called the Heat Flux Array (HFA). Unique …
-
Heat Flux Measurements from a Human Forearm under Natural Convection and Isothermal Jets
This work is an experimental study on heat transfer from a human arm and a model cylinder. Heat transfer from a human forearm to a large jet, representative of a building HVAC vent/outlet was studied using both an IR camera and a heat flux sensor. The isothermal jet was discharged horizontally from …
-
Visualising convective heat transfer in a propagating wildland fire
… and emergency response. While radiative heat transfer has traditionally been emphasized in bushfire modelling, recent studies reveal the significant role of convective heat transfer, especially in fine porous fuels. This thesis investigates the complex contributions of convective heating …
-
Transverse Thermoelectric Effects for Cooling and Heat Flux Sensing
… thermoelectric effects for localized cooling and heat flux sensing. Thermoelectric cooling devices are useful when their advantages (small size, solid state, active temperature control) outweigh their relatively poor efficiency. Transverse heat flux sensors, which generate an electric field in a …
-
Steady and Unsteady Heat Transfer in a Film Cooled Transonic Turbine Cascade
… equipped with a showerhead film cooling scheme. Heat flux, surface pressure and surface temperature are measured at six locations on the suction side of the central blade. Pressure measurements are taken with Kulite XCQ-062-50a high frequency pressure transducers. Heat flux data is obtained with …
-
An experimental investigation of the mechanism of heat transfer augmentation by coherent structures
The mechanism by which convective heat transfer is augmented by freestream turbulence in the stagnation region was studied experimentally. Previous work has suggested that the primary mechanism for the observed augmentation is the amplification of vorticity into strong vortices which dominate the …
-
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 …
-
Multidimensional and High Frequency Heat Flux Reconstruction Applied to Hypersonic Transitional Flows
… in high-speed flow has a substantial effect on heat transfer and skin friction, thus improving the design and operation of hypersonic vehicles. The control of transition on blunt bodies is essential to improve the performance of lifting and control surfaces. The objective of this Ph.D. research …
-
A Novel, Hands-On Approach to Teaching Heat Transfer
The topic of heat transfer is traditionally taught as an upper level, lecture-style course to mechanical engineering students. Such courses do not provide students with ways to see and feel the important heat transfer concepts at hand. As a way to overcome this, novel, hands-on workshops have been …
-
Development of Methodologies for the Noninvasive Estimation of Blood Perfusion
… estimation techniques. The probe consists of a heat flux sensor and surface thermocouple placed in contact with tissue while the opposite side is cooled by jets of room temperature air. The biothermal model predicts the temperature and heat flux within tissue and probe based upon the input of …
-
Experimental investigation and modeling of lithium-ion battery cells and packs for electric vehicles
… and management of operating temperatures and heat generation. Vehicle performance, reliability and ultimately consumer market adoption are dependent on the successful design of the thermal management system. In addition, accurate battery thermal models capable of predicting the behavior of …
-
Decentralized HVAC Operations: Novel Sensing Technologies and Control for Human-Aware HVAC Operations
… Technology (ICT) paved the way for decentralized Heating, Ventilation, and Air-Conditioning (HVAC) HVAC operations. It has been envisioned that development of personal thermal comfort profiles leads to accurate predictions of each occupant's thermal comfort state and such information is employed …