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 7 of 7 for “"Rim seal"”.
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Characterization of turbine rim seal flow and its sealing effectiveness
… air from the compressor is used to "purge" the rim seal cavities. Establishing a quantitative understanding of the wheelspace and rim cavity flow processes driving ingestion is critical to optimizing seal design and minimizing the associated performance penalty. A computational model of the …
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Computational assessment of turbine rim seal system parametric variation on hot gas ingestion and flow pattern
A design of experiments (DOE) is carried out to assess the turbine rim cavity system parametric variation on hot gas ingestion, flow pattern, and turbine stage efficiency. The parameters focused on are purge to main mass flow rate ratio, axial gap to rim radius ratio, radial gap to rim radius …
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Assessment of Scaling Rule for Hot Gas Ingestion in Representative Turbine Rim Seal System for Large Industrial Gas Turbines
… ingestion depth in terms of a non-dimensional sealing parameter for a rim seal cavity wheelspace system representative of that in an industrial gas turbine for power generation. The non-dimensional sealing parameter consists of the ratio of purge mass flow rate to a characteristic mass flow …
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The Effect of Endwall Contouring On Boundary Layer Development in a Turbine Blade Passage
… leakage features such as the stator-rotor rim seal had a significant effect on the endwall heat transfer, although leakage flow from the rim seal only affected the horseshoe vortex. The contours studied were not effective at reducing the impact of secondary flows on endwall heat transfer …
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Mechanisms of hot gas ingestion in turbine disk cavities
… purged with colder air from the compressor, and rim seals are used at the entrance from the mainstream. Various mechanisms of ingestion have been proposed, and studied in great detail, but other potential mechanisms have been largely neglected. This thesis aims to test the sensitivity of …
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Experimental and analytical assessment of cavity modes in a gas turbine wheelspace
… Rig shows the existence of cavity modes in the rim-seal-wheelspace cavity for representative turbine engine operating conditions with purge flow. The experimental results and observations are complemented by computational assessments of cavity modes associated with flow in canonical cavity …