Author: Robert John ButlerPublisher:
ISBN:
Category :
Languages : en
Pages : 582
Book Description
The Effects of the Thermal Boundary Condition and Turbulence on Heat Transfer from a Cylinder, Flat Plate, and Turbine Blade Using the Transient Shroud and Heated-coating Techniques
Author: Robert John ButlerScientific and Technical Aerospace Reports
Author: Measurements of the Heat Transfer Coefficient Distribution on Flat and Ribbed Surfaces with Interrupted Heating Using Thermochromic Liquid Crystals
Author: Jason D. WolfPublisher:
ISBN:
Category :
Languages : en
Pages : 266
Book Description
Measurements of the heat transfer coefficient distribution on flat and ribbed surfaces with interrupted heating are presented. One application of this type of thermal boundary condition is the cooling of surface mounted modules in electronic packaging. Heating occurs at the modules, with no heating between the modules. The heat transfer measurements in the present study are made using the heated-coating method with a thermochromic liquid crystal (TLC). The "coating" is vacuum-deposited gold on a plastic sheet, which is mounted on a Styrofoam surface. The gold film is electrically heated to produce the surface heat flux. The surface temperature is measured by capturing color images of the TLC, using the hue technique. These surface temperature plots are transformed into heat transfer coefficient distributions on the surface of the models. Interrupted heating on the flat surface is obtained by heating strips perpendicular to the freestream flow, with insulated spaces between the strips. The ribbed surface is heated on the top of the ribs only, with insulated unheated cavities in-between. The results show that, as expected, the local heat transfer coefficient is higher on the heated strips of the flat surface interrupted heating case, than would be present at the same locations with a uniform heat flux. The interruption of the thermal boundary layer at each unheated section allows it to "reset", thereby causing the higher heat transfer on the following heated section. The ribbed model shows a slight increase in heat transfer on the ribs above that of the flat plate interrupted heating model. The cavities appear to introduce mixing that causes this change. The increase in h due to the ribs is small, however, when compared to the effect of the interrupted heating.
Dissertation Abstracts International
Author: Publisher:
ISBN:
Category : Dissertations, Academic
Languages : en
Pages : 780
Book Description
Journal of Heat Transfer
Author: Government Reports Announcements & Index
Author: An Experimental Study of Local Heat Transfer to an Impinging Jet on Non-flat Surfaces
Author: Masood MesbahPaper
Author: Publisher:
ISBN:
Category : Mechanical engineering
Languages : en
Pages : 568
Book Description
Thermochromic Liquid Crystal Thermography
Author: Michael Robert AndersonPublisher:
ISBN:
Category :
Languages : en
Pages : 624
Book Description
American Doctoral Dissertations
Author: Publisher:
ISBN:
Category : Dissertation abstracts
Languages : en
Pages : 800
Book Description