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Method of designing cascade blades with prescribed velocity distributions in compressible potential flows

Description: By use of the assumption that the pressure-volume relation is linear, a solution to the problem of designing a cascade for a given turning and with a prescribed velocity distribution along the blade in a potential flow of a compressible perfect fluid was obtained by a method of correspondence between potential flows of compressible and incompressible fluids. The designing of an isolated airfoil with a prescribed velocity distribution along the airfoil is considered as a special case of cascade.… more
Date: October 1, 1949
Creator: Costello, George R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Possible Application of Blade Boundary-Layer Control to Improvement of Design and Off-Design Performance of Axial-Flow Turbomachines

Description: "A theoretical discussion of the application of blade boundary-layer control to increase the efficiency and the stage pressure ratio and to improve off-design performance of turbomachines is presented. A method based on the potential flow of a compressible fluid is developed for designing suction, or ejection, slotted blades having a prescribed velocity distribution along the blade and in the slot. The effect of the boundary layer on the design of the slot and the effect of ejecting gas at stag… more
Date: May 1951
Creator: Sinnette, John T., Jr. & Costello, George R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Smoke studies of secondary flows in bends, tandem cascades, and high-turning configurations

Description: Flow-visualization studies, using smoke, were made of the secondary flows in rectangular bends, tandem cascades, and high-turning configurations. The roll-up of the wall boundary layer of a rectangular bend forms a passage vortex near the suction surface similar to that previously observed for cascades. The vortex so formed then shifts out into the main stream. Because of leading-edge effects, the boundary-layer flows in bends were found to be sufficiently different from the flows in blade rows… more
Date: March 11, 1953
Creator: Hansen, Arthur G.; Herzig, Howard Z. & Costello, George R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

A visualization study of secondary flows in cascades

Description: Flow-visualization techniques are employed to ascertain the streamline patterns of the nonpotential secondary flows in the boundary layers of cascades, and thereby to provide a basis for more extended analyses in turbomachines. The three-dimensional deflection of the end-wall boundary layer results in the formation of a vortex within each cascade passage. The size and tightness of the vortex generated depend upon the main-flow turning in the cascade passage. Once formed, a vortex resists turnin… more
Date: 1954
Creator: Herzig, Howard Z.; Hansen, Arthur G. & Costello, George R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Expressions for Measuring the Accuracy of Approximate Solutions to Compressible Flow Through Cascades of Blades With Examples of Use

Description: Report presenting four necessary conditions for steady irrotational compressible flow through a straight cascade of blades as derived from the irrotationality condition and conservation of mass and momentum. The expressions used can only give an approximate solution to the conditions, as there are an infinite number of them.
Date: October 1951
Creator: Sinnette, John T., Jr.; Costello, George R. & Cummings, Robert L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Detailed Computational Procedure for Design of Cascade Blades With Prescribed Velocity Distributions in Compressible Potential Flows

Description: "A detailed step-by-step computational outline is presented for the design of two-dimensional cascade blades having a prescribed velocity distribution on the blade in a potential flow of the usual compressible fluid. The outline is based on the assumption that the magnitude of the velocity in the flow of the usual compressible nonviscous fluid is proportional to the magnitude of the velocity in the flow of a compressible nonviscous fluid with linear pressure-volume relation" (p. 1).
Date: 1952
Creator: Costello, George R.; Cummings, Robert L. & Sinnette, John T., Jr.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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