00000nam 2200000za 4500 9.821351 CaOODSP 20250529084347 cr ||||||||||| 160720s2013 onc|||||o f000 0 eng d CaOODSP eng eng fre n-cn--- D68-6/177-2013-1E-PDF Hally, David, 1954- C++ classes for representing propeller geometry [electronic resource] / by David Hally. [Ottawa] : Defence Research and Development Canada, c2013. x, 80 p. : tables, graphs. Technical Memorandum ; 2013-177 "October 2013." Includes bibliographical references. To satisfy the need for high fidelity representations of propellers for use in Reynolds-averaged Navier-Stokes (RANS) flow solvers and other propeller applications, a library of C++ classes has been developed. It provides classes representing the surfaces of the propeller blades, hubs and ducts in fully differentiable form. The propeller blades can be defined using the traditional method of specifying the blade section shape, chord length, pitch, skew and rake at a series of radial sections. More general blade shapes are also possible provided that they conform to fairly loose requirements on the blade parameterization. Simple cylindrical and cigar-shaped hubs can be defined as well as more general axisymmetric shapes defined from splined offsets. Similarly, propeller ducts can be defined from commonly used duct cross-sections or more general shapes defined from offsets. gccst Technical reports Propellers Computer programs Defence R&D Canada. Technical memorandum (Defence R&D Canada) 2013-177 (CaOODSP)9.820564 PDF 1.33 MB https://publications.gc.ca/collections/collection_2016/rddc-drdc/D68-6-177-2013-1-eng.pdf