00000nam 2200000zi 4500 9.875767 CaOODSP 20250529084348 m o d f cr |n||||||||| 190702t20182018nsca #ob f000 0 eng d CaOODSP eng rda CaOODSP n-cn--- D68-10/055-2018E-PDF Hally, David, 1954- author. Modelling a propeller using force and mass rate density fields / David Hally. [Dartmouth, Nova Scotia] : Defence Research and Development Canada = Recherche et développement pour la défense Canada, 2018. ©2018 1 online resource (22 pages) : figures. text txt rdacontent computer c rdamedia online resource cr rdacarrier External literature (P) ; DRDC-RDDC-2018-P055 Cover title. "Can unclassified." "April 2018." Includes bibliographical references (pages 21-22). "A method to replace a propeller by force and mass rate density fields has been developed. The force of the propeller on the flow is calculated using a boundary element method (BEM) program and used to generate the force and mass rate fields in a Reynolds-averaged Navier-Stokes (RANS) solver. The procedures to calculate the fields and to allocate them to the cells of a RANS grid are described in detail. The method has been implemented using the BEM program PROCAL and the RANS solver OpenFOAM and tested using the propeller DTMB P4384 operating in open water. Close to the design advance coefficient, the time-average flow fields generated by PROCAL and by OpenFOAM with the force and mass rate fields match to within 1.5% of the inflow speed over almost all of the flow field, including the swept volume of the blades. At two-thirds of the design advance coefficient, the match is about 4% of the inflow speed. The sensitivity of the method to several of its free parameters is investigated"--Abstract. gccst Ships Defence R&D Canada. Atlantic Research Centre. External literature (P) (Defence R&D Canada) DRDC-RDDC-2018-P055. (CaOODSP)9.854437 PDF 1.24 MB https://publications.gc.ca/collections/collection_2019/rddc-drdc/D68-10-055-2018-eng.pdf