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Calculation methods for rotor wake formation in forward flightThe primary focus of this research centered on improving the vorticity-capturing properties of Eulerian flow solvers in convection-dominated flows. The work was motivated by the fact that excessive numerical diffusion observed in current Euler solvers on grids of feasible size is a major obstacle to accurately computing the flow about helicopter rotors, especially in the forward flight case. The work was originally supported by NASA Grant NAG2-421 for two years. The research then continued for four more years under an ONR contract. The research goal of reduction of numerical diffusion in Euler solvers remained the same, although the target application was now the prediction of internal vortical secondary flows. This was part of a larger ONR-sponsored research program at MIT aimed at reducing the noise of turbopumps. The research work culminated in the PhD thesis titled 'A Coupled Eulerian/Lagrangian Method for the Solution of Three-Dimensional Vortical Flows'.
Document ID
19950002024
Acquisition Source
Legacy CDMS
Document Type
Contractor Report (CR)
Authors
Drela, Mark
(Massachusetts Inst. of Tech. Cambridge, MA, United States)
Date Acquired
August 17, 2013
Publication Date
January 1, 1993
Subject Category
Aerodynamics
Report/Patent Number
NAS 1.26:196787
NASA-CR-196787
Accession Number
95N70139
Funding Number(s)
CONTRACT_GRANT: NAG2-421
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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