1,057 research outputs found

    Infrared thermography for convective heat transfer measurements

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    Observation and evaluation of an adult education class in home economics at Kearns High School

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    honors thesisCollege of Social & Behavioral ScienceFamily and Consumer StudiesIn some high schools home economics teachers have the option of having a sumrner program for interested students. These students decide upon some type of project which the teacher must approve as worthy of the student's ability. My honors project was made possible because such a summer program was conducted from Kearns High School. Mrs. Anna Dee Sherwood, as a teacher concerned about community problems, wanted to reach the adult homemakers of Kearns as well as their daughters. To do so she set up a special class. One of her purposes was to provide for the adults a number of lessons that would help them better manage their homes. A second purpose was to show how the local high school could be a place of learning for the entire community, not just for high school students. Many of the people of Kearns seem to feel that "school" is only for children and that education stops with high school, if not before

    Improved understanding of combustor liner cooling

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    EThOS - Electronic Theses Online ServiceGBUnited Kingdo

    Internalized HIV Stigma Reduction Program: A Grant Proposal

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    The purpose of this project was to write a grant proposal for Foothill Aids Project (FAP) to obtain funding for an internalized HIV stigma (IHS) reduction program, with the goal being to increase general well-being and adherence to antiretroviral therapy among participants. The target population was PLWH/A in Riverside/ San Bernardino County California. An extensive literature review was conducted to examine the damaging effects of IHS, not only on PLWH/A, but also on the efforts to end the HIV epidemic. The literature review revealed a significant lack of empirical research on IHS reduction interventions. Thus, interventions treating other stigmatized conditions were adapted to formulate the program. Funding sources were identified, as well as objectives, activities, and outcomes in order to increase the success of the program. Lastly, a budget narrative, including a line item budget, was included to justify the amount of funding that was requested. Actual submission of this grant was not required for the successful completion of this thesis project

    Improved understanding of combustor liner cooling

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    Heat management is an essential part of combustor design, as operating temperatures within the combustor generally exceed safe working temperatures of the materials employed in its construction. Two principal methods used to manage this heat are impingement and film cooling. Impingement heat transfer refers to jets of impinging fluid delivered by orifices integrated into internal structures in order to remove undesired heat. This mode of heat transfer has a relatively high effectiveness, making it an attractive method of heat management. As such, a considerable number of studies have been done on the subject providing a substantial body of useful knowledge. However, there are innovative cooling configurations being used in gas turbines which generate compressibility and temperature ratio effects on heat transfer which are currently unexplored. Presented here are data showing that these effects have a significant impact on heat transfer and new correlations are presented to account for temperature ratio and Mach number effects for a range of conditions. These findings are significant and can be applied to impinging flows in other areas of a gas turbine engine such as turbine blades and vanes. Film cooling refers to the injection of coolant onto a surface through an array of sharply angled holes. This is done in a manner that allows the coolant to remain close to the surface where it provides an insulating layer between the hot gas freestream and the cooler surface. In order to improve turbine efficiency, research efforts in film cooling are directed at reducing film cooling flow without decreasing turbine inlet temperatures. Both impingement cooling and film cooling are heavily utilized in combustor liners. Frequently, cooling air first impinges against the back side of the liner, then the spent impingement fluid passes through film cooling holes. This arrangement combines the convective heat transfer of the impinging jets convection as the coolant passes through the film cooling holes and the benefits that come from having a thin film of cool air between the combustor wall and the combustion products. In order to improve the understanding of internal cooling in gas turbine engines, the influence of previously unexplored physical parameters such as compressible flow effects and temperature ratio in impingement flows and variable blowing ratio in a film cooling array must be examined. Prior to this work, there existed in the available literature only an extremely limited exploration of compressibility effects in impingement heat transfer and the results of separately examining the effects of Mach number and Reynolds number. The film cooling literature provides no information for a full array of film cooling holes along a contraction at high blowing ratios. Exploring these effects and conditions adds to the body of available data and allows the validation of numerical predictions.</p
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