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Pressure-loss and flow coefficients inside a chordwise-finned, impingement, convection, and film air-cooled turbine vane
| Content Provider | Semantic Scholar |
|---|---|
| Author | Hippensteele, Steven A. |
| Copyright Year | 1974 |
| Abstract | SUMMARYTotal-pressure-loss coefficients, flow discharge coefficients, andfriction factors were experimentally determined for the various area andgeometry changes and flow passages within an air-cooled turbine vane. Thesupply and local external pressure levels of the vane, with no external flowof gas over the airfoil, were controlled to simulate those which might beexpected in an engine. The investigation was conducted with essentiallyambient-temperature air. The measured expansion and contraction total-pressure-loss coefficients ranged from 1.03 to 1.85. These coefficientsin general can be predicted within about 20 percent with available infor-mation. The orifice flow discharge coefficients were essentially constantand varied from 0.73 to 0.87. These values compared well with results thatothers obtained with similar passage configurations.INTRODUCTIONAn experimental investigation was made to determine total-pressure-loss coefficients, flow discharge coefficients, and friction factors of anair-cooled turbine vane and to compare the results with available data orcorrelations.An accurate knowledge of cooling airflow distribution within turbinevanes is necessary for the correct prediction of both metal temperaturedistribution and vane life. Cooling airflow distribution is, in turn,based on accurate knowledge of pressure-loss and flow coefficients. Thisstudy is part of a series of studies by the Lewis Research Center to in-vestigate experimental coolant pressure-loss and flow coefficients invarious vanes, blades, and flow models. In a previous study (ref. 1), thedischarge coefficients for thick-plate orifice flow models were determined.In reference 2 the coolant flow through a predominantly convection-cooledvane with trailing-edge pin fins and leading-edge impingement cooling was |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | https://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/19740011532.pdf |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
