A rapid computational model for estimating the performance of compliant airfoils in cascades
Abstract
We consider the problem of designing the blades in a turbomachine to have a specific schedule of structural stiffness in order to achieve more favorable aerothermodynamic performance characteristics than is possible with rigid blades. The problem of "aerothermodynamic tailoring" is extremely complex because of the need to couple the flow computation over a deforable surface with the structual dynamics computation. In this report an anlysis is presented with accomplishes this objective by means of a two-dimensional incompressible potential flow model using vortex sheet representation of the blades. Details of the analysis and of the resulting computer program together with representative results are described.
Rights
This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.NPS Report Number
NPS-AA-93-001Related items
Showing items related by title, author, creator and subject.
-
Progress in the prediction of unsteady heat transfer on turbines blades
Cebeci, T.; Simoneau, R.J.; Krainer, A.; Platzer, M.F. (1987-01);Progress toward developing a general method for predicting unsteady heat transfer on turbine blades subject to blade-passing frequencies and Reynolds numbers relevant to the Space Shuttle Main Engine (SSME) is discussed. ... -
Simulation of a rotocraft in turbulent flows
Moran, Robert D., Jr. (Monterey, California. Naval Postgraduate School, 1991-09);Accurate simulation of helicopters in an at-sea-shipboard environment is desired to provide realistic operating envelopes without incurring the enormous cost of real-time flight tests. This study examines the simulation ... -
Viability of Cross-Flow Fan with Helical Blades for Vertical Take-off and Landing Aircraft
Kwek, Howe Leng (Monterey, California. Naval Postgraduate School, 2012-09);The cross-flow fan (CFF) is a lifting and propulsion device that retains the advantages of a fixed-wing aircraft by using a ducted lift fan. There is no upper limit to the rotor length-to-diameter ratio of a CFF, allowing ...