Flow separation from submarine shaped bodies of revolution in steady turning. (1st November 2015)

• Record Type: Journal Article
• Authors: Holloway, A.G.L.; Jeans, T.L.; Watt, G.D.
• Is Part Of: Ocean engineering. Volume 108(2015)
• Page Start: 426
• Page End: 438
• Publication Date: 2015-11-01
• Subjects: Submarines -- Slender bodies of revolution -- Steady turning -- Separation -- Separation line modeling; Ocean engineering -- Periodicals; Ocean engineering; Periodicals; 620.4162
• DOI: 10.1016/j.oceaneng.2015.07.052
• Languages: English
• ISSNs: 0029-8018

Abstract

Abstract: Flow separation from 3 slender bodies of revolution in steady turning is studied using Computational Fluid Dynamics RANS simulations. The body profiles include the DRDC-STR, DARPA SUBOFF, and the Series-58 Model 4621. The flow conditions consider varying turning radii, 1.0 ≤ R / l ≤ 10 (where R is the radius of the turn and l is the body length) with a fixed pivot point located 25% aft of the nose. The Reynolds numbers considered were 6.5, 11.7 and 23 million. Scaling laws deduced for the development of separation along the midbody and tail were used to develop an analytical model for predicting the separation line along a body of revolution of arbitrary profile. Highlights: Computational database of separation lines on hull forms in steady turning. Model of the separation lines along axisymmetric hull forms in steady turning. Near the pivot point with weak crossflow, separation governed by the turning rate. Well aft of pivot point with strong crossflow, separation governed by crossflow rate. Along the contracting tail separation is governed by contraction rate.