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Showing 1 to 10 of 10 for “"Gas Turbine Cooling"”.
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Assessment of shaped film cooling holes at high density ratios for gas turbine cooling using S-PIV and PSP.
During film-hole cooling, relatively cold air is extracted from the compressor of a gas turbine engine and forced through the turbine airfoils in order to lower their surface temperatures. To investigate the effects of various film cooling hole geometries on film-cooling hole performance, shaped …
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Analysis of film cooling performance of tripod hole
The thermal efficiency of a gas turbine directly depends on the rotor inlet temperature. The ever increasing demand for more power and advances in the field of engineering enabled this temperature to be pushed higher. But the material strength of the blades and vanes can often impose restrictions …
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Design, Analysis, and Development of a Tripod Film Cooling Hole Design for Reduced Coolant Usage
… focus on improving the effectiveness of the film cooling technique through the use of a new approach to film cooling. This new approach uses a set of three holes sharing the same inlet and diverging from the central hole to form a three-legged, or tripod, design. The tripod design is examined in …
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Heat Transfer Performance Improvement Technologies for Hot Gas Path Components in Gas Turbines
… past few decades, the operating temperatures of gas turbine engines have increased significantly with a view towards increasing the overall thermal efficiency and specific power output. As a result of increased turbine inlet temperatures, the hot gas path components downstream of the combustor …
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Study Of Heat Transfer Characteristics Of Impinging Air Jet Using Pressure Andn Temperature Sensitive Luminescent Paint
Luminescent coating measurement system is a relatively new technology for quantitative pressure and temperature measurement. Usually referred to as Pressure Sensitive Paint (PSP) and Temperature Sensitive Paint (TSP), luminescent coatings contain sensor molecules, which undergoes a luminescent …
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Experimental Investigation of Temperature Effects on Microparticle Sand Rebound Characteristics at Gas Turbine Representative Conditions
When a gas turbine operates in a particle laden environment, such as a desert, small solid particles are ingested into the engine. The ingested sand particles can cause damage to engine components and reduce the service life of the engine. Particle ingestion causes the erosion of metal blades and …
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Detailed Experimental Measurements of Heat Transfer Augmentation in Internal Channels Using a Thermochromic Liquid Crystal Technique
Design of internal cooling channels for gas turbine blade is critical to system performance. To achieve maximum efficiency, i.e. maximum cooling with minimum coolant usage, intensive research is required to optimize heat transfer enhancement features. The present study aims at experimental and …
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Heat Transfer to Arrays of Oscillating Impingement Jets
<p>In gas turbine engines, the desire to increase turbine entry temperatures has become more relevant in order to increase engine efficiency. However, materials used in these engines can only withstand temperatures that are so high. Because of this, the ability to cool hot section components will …
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Heat Transfer in Stationary and Rotating Coolant Channels Using a Transient Liquid Crystal Technique
… channels have a significant impact in design of gas turbine airfoils and other rotating components such as generator windings. The effects of the Coriolis acceleration and centrifugal buoyancy have a significant impact on heat transfer behavior inside such rotating coolant channels due to the …
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Investigation into the optimal cooling configuration for a gas turbine airfoil utilizing a thermal barrier coating
The overall cooling effectiveness of a gas turbine airfoil characterizes the conjugate effect of both film cooling and internal cooling on an airfoil in one parameter. Few studies in open literature have explored the overall cooling effectiveness of airfoil's utilizing a thermal barrier coating. In …