ANSYS CFX–10 RANS Normal Force Predictions for the Series 58 Model 4621 Unappended Axisymmetric Submarine Hull in Translation

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Authors
  1. Watt, G.D.
  2. Baker, C.R.
  3. Gerber, A.G.
Corporate Authors
Defence R&D Canada - Atlantic, Dartmouth NS (CAN);New Brunswick Univ, Fredericton NB (CAN)
Abstract
The ability of the commercial Reynolds Averaged Navier Stokes (RANS) software package ANSYS CFX–10 to predict the normal force on an unappended submarine hull at uniform incidence angles up to 18 degrees is evaluated. Hybrid meshes of several million nodes each are created using a script to adapt the mesh to the body vortex for various angles of attack. A formal verification procedure was attempted and shown to be dependent on solutions converged to four or five significant figures. Numerical discretization error is shown to be much smaller than the differences between experimental and RANS normal forces. Turbulence modelling has a marked effect on these differences, which are greater than 20% for the Shear Stress Transport two-equation model and 10% for the Baseline Reynolds Stress seven-equation model.

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Report Number
DRDC-ATLANTIC-TM-2006-037 — Technical Memorandum
Date of publication
01 Sep 2006
Number of Pages
32
DSTKIM No
CA029019
CANDIS No
527222
Format(s):
CD ROM

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