Download or read book An Investigation of the Secondary Flow Phenomena in a Cascade of High deflection Axial flow Impulse Turbine Blades written by Rodney Loren Bown and published by . This book was released on 1966 with total page 59 pages. Available in PDF, EPUB and Kindle. Book excerpt: Cascade tests were performed on models of the rotor blades of a high-deflection, axial-flow impulse turbine to determine the secondary flow losses. The tests were performed at the Rectilinear Cascade Test Facility of the Turbo-Propulsion Laboratories of the Department of Aeronautics, Naval Postgraduate School. The results were compared with the predicted losses from various formulas that have been proposed in the technical literature. The comparison showed that most formulas predict a secondary loss that is about ten times as high as that determined in the present tests. Photographs were obtained of the boundary layer traces by the use of lamp black coating. These photographs show the effects of secondary flows on the performance of a cascade. (Author).
Download or read book An Investigation of the Secondary Flow Phenomena in a Cascade of High deflection Axial flow Impulse Turbine Blades written by and published by . This book was released on 1966 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Cascade tests were performed on models of the rotor blades of a high-deflection, axial-flow impulse turbine to determine the secondary flow losses. The tests were performed at the Rectilinear Cascade Test Facility of the Turbo-Propulsion Laboratories of the Department of Aeronautics, Naval Postgraduate School. The results were compared with the predicted losses from various formulas that have been proposed in the technical literature. The comparison showed that most formulas predict a secondary loss that is about ten times as high as that determined in the present tests. Photographs were obtained of the boundary layer traces by the use of lamp black coating. These photographs show the effects of secondary flows on the performance of a cascade. (Author).
Download or read book Abstracts of Dissertations Theses and Research Papers Submitted by Candidates for Degrees written by Naval Postgraduate School (U.S.) and published by . This book was released on 1966 with total page 628 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Technical Abstract Bulletin written by Defense Documentation Center (U.S.) and published by . This book was released on 1967 with total page 784 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book An Investigation of Secondary flow Phenomena and Associated Losses in a High deflection Turbine Cascade written by James Raney Woods and published by . This book was released on 1972 with total page 123 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book An Investigation of Secondary Flow Phenomena and Associated Losses in a High Deflection Turbine Cascade written by James Raney Woods (Jr) and published by . This book was released on 1972 with total page 122 pages. Available in PDF, EPUB and Kindle. Book excerpt: The report presents precise quantitative data established for the overall flow losses in a high-deflection turbine rotor cascade for a range of aspect ratios h/c from 1.480 to 0.592. The magnitude of the losses due to secondary-flow effects was also determined. From these measurements it was possible to obtain an improved physical description of the complex secondary-flow phenomena. (Author).
Download or read book Experimental Investigation of Loss in an Annular Cascade of Turbine nozzle Blades of Free Vortex Design written by Hubert W. Allen and published by . This book was released on 1953 with total page 42 pages. Available in PDF, EPUB and Kindle. Book excerpt: An investigation of the flow pattern immediately downstream of an annular cascade of nozzle blades designed for vortex-type velocity distribution and hub discharge angle of approximately 65 degrees from axial was conducted in order to obtain a better understanding of the processes by which the distribution of losses and deviations from design turning angle occur. For the two Mach numbers investigated, the loass region at the outer shroud decreased while that at the inner shroud increased with increasing Mach number.
Download or read book Cascade Tests of the Blading of a High deflection Single stage Axial flow Impulse Turbine and Comparison of Results with Actual Performance Data written by and published by . This book was released on 1966 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Cascade tests were performed on models of the stator (nozzles) and rotor blade rows of a high deflection, single-stage, axial-flow impulse turbine. The results of these tests were compared with the performance data of the actual turbine. The comparison showed that profile and mixing losses, though not negligible, constitute only a small percentage of the overall rotor loss. Also, the inlet flow angle at which the minimum loss occurred for the Cascade flow was significantly different from the inlet flow angle at which minimum actual rotor loss occurred.
Download or read book Study of Secondary flow Patterns in an Annular Cascade of Turbine Nozzle Blades with Vortex Design written by Harold E. Rohlik and published by . This book was released on 1953 with total page 38 pages. Available in PDF, EPUB and Kindle. Book excerpt: In order to increase understanding of the origin of losses in a turbine, the secondary-flow components in the boundary layers and the blade wakes of an annular cascade of turbine nozzle blades (vortex design) were investigated. A detailed study was made of the total-pressure contours and, particularly, of the inner-wall loss cores down-stream of the blades.
Download or read book Cascade Tests of the Blading of a High deflection Single stage Axial flow Impulse Turbine and Comparison of Results with Actual Performance Data written by John Eugene Bartocci and published by . This book was released on 1966 with total page 162 pages. Available in PDF, EPUB and Kindle. Book excerpt: Cascade tests were performed on models of the stator (nozzles) and rotor blade rows of a high deflection, single-stage, axial-flow impulse turbine. The results of these tests were compared with the performance data of the actual turbine. The comparison showed that profile and mixing losses, though not negligible, constitute only a small percentage of the overall rotor loss. Also, the inlet flow angle at which the minimum loss occurred for the Cascade flow was significantly different from the inlet flow angle at which minimum actual rotor loss occurred.
Download or read book Secondary Flows in Turbomachines written by and published by . This book was released on 1990 with total page 341 pages. Available in PDF, EPUB and Kindle. Book excerpt: These proceedings contain the 24 papers presented at the meeting on secondary flows in turbomachines. The meeting was arranged in the following sessions: Basic flow phenomena (6); Experimental results (5); Three-dimensional computation and comparison with experiments (5); Tip clearance flows (4); and Secondary flow effects on heat transfer (4). The specialists' meeting offered a forum for experts to discuss computational and experimental methods and results for secondary flow in cascades, compressors and turbines. CFD was found to be an adequate tool to represent qualitative phenomena, but on the accuracy of predicting losses and exit angles there was some disagreement. Many papers dealt with experimental investigations which are obviously essential for evaluating secondary flow models. Keywords: Three dimensional flow computations; Cascade structures; Axial flow compressors; Airfoils; Turbulent flow/mixing; Nozzle guide vanes; Transonic nozzles; Aspect ratio; Centrifugal impellers; Radial compressors; Blade tips; Turbine blades; Cascades fluid dynamics; Compressors; End wall flow; Computational fluid dynamics; Tip leakage flow; Secondary flow; Turbine guide vanes.
Download or read book Secondary Flows and Losses in a Turbine Cascade written by D. G. Gregory-Smith and published by . This book was released on 1983 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt: In designing axial flow turbines, one needs relatively simple prediction techniques for the angle variations and losses produced by secondary flows. To improve the physical basis of such techniques, an investigation was made of the flow in a cascade of large scale rotor blades of some 110 deg of turning. The aspect around 0.2 of the span. The flow was traversed in great detailed on ten planes using cobra-type probes with a computerised data recording and analysis system. Results are presented graphically using contour and vector plots on various planes through the flow field. The horse-show vortex and passage vortex development are clearly seen, with the upstream boundary layer being shed downstream as a loss core. Another region of high loss is related to a counter vortex in the corner between the sunction surface and the end wall. Results were also pitch averaged, and compared with predictions of angle and loss distribution. Some traversing was carried out using hot wire anemometry. Regions of high turbulence intensity and shear stress were identified, associated with the regions of high loss. Some indication is given of the mechanisms of loss production within the cascade.
Download or read book Visualization of Secondary flow Phenomena in Cooled Gas turbine Blades written by Timothy Bradley Nichols and published by . This book was released on 1970 with total page 110 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Report written by and published by . This book was released on 1945 with total page 620 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Paper written by and published by . This book was released on 1993 with total page 584 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Comparison of Secondary Flows and Boundary layer Accumulations in Several Turbine Nozzles written by Milton G. Kofskey and published by . This book was released on 1953 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt: An investigation of secondary-flow loss cores originating in turbine nozzle blade passages was conducted by means of flow visualization studies and detailed flow measurements. The degree of which blade surface velocity profiles affect the magnitude and concentration of loss cores was investigated by comparing three nozzle blade configurations.
Download or read book The Secondary Flow in a Cascade of Turbine Blades written by Aeronautical Research Council and published by . This book was released on 1957 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
