A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Relevance of transition turbulent model for hydrodynamic characteristics of low Reynolds number propeller
Abstract The propeller of an Autonomous Underwater Vehicle (AUV) operates at low Reynolds number in laminar to turbulent transition region. The performance of these propellers can be calculated accurately using RANSE solver with γ − Re θ transition model. In this study, the global and local hydrodynamic characteristics of open and ducted propeller are investigated using the γ − Re θ transition model. The capability of the γ − Re θ transition model to capture laminar to turbulent transition on the surface of the open propeller is demonstrated by comparison with published experimental results. The application of transition model for the propeller K a-4-70 inside the duct 19A shows that the centrifugal forces are dominant at low Reynolds number and the flow is mainly directed in the radial direction. The transition model is able to predict complex flow physics such as leading-edge separation, tip leakage vortex, and the separation bubble on outer surface of the duct. The accurate prediction of these flow phenomenon can lead to correct calculation of global hydrodynamic forces and moments acting on the propeller at low Reynolds number.
Relevance of transition turbulent model for hydrodynamic characteristics of low Reynolds number propeller
Abstract The propeller of an Autonomous Underwater Vehicle (AUV) operates at low Reynolds number in laminar to turbulent transition region. The performance of these propellers can be calculated accurately using RANSE solver with γ − Re θ transition model. In this study, the global and local hydrodynamic characteristics of open and ducted propeller are investigated using the γ − Re θ transition model. The capability of the γ − Re θ transition model to capture laminar to turbulent transition on the surface of the open propeller is demonstrated by comparison with published experimental results. The application of transition model for the propeller K a-4-70 inside the duct 19A shows that the centrifugal forces are dominant at low Reynolds number and the flow is mainly directed in the radial direction. The transition model is able to predict complex flow physics such as leading-edge separation, tip leakage vortex, and the separation bubble on outer surface of the duct. The accurate prediction of these flow phenomenon can lead to correct calculation of global hydrodynamic forces and moments acting on the propeller at low Reynolds number.
Relevance of transition turbulent model for hydrodynamic characteristics of low Reynolds number propeller
Pawar, Suraj (author) / Brizzolara, Stefano (author)
Applied Ocean Research ; 87 ; 165-178
2019-02-25
14 pages
Article (Journal)
Electronic Resource
English
Hydrodynamic Interactions at Low Reynolds Number
| British Library Online Contents | 2010
Prediction of Buoyant, Turbulent Flow by a Low-Reynolds-Number k- Model
| British Library Conference Proceedings | 1990
Application of Dynamic Mesh in Analysis of Propeller Hydrodynamic Characteristics
| British Library Conference Proceedings | 2012
Turbulent simulation of open channel flow at low Reynolds number
| British Library Conference Proceedings | 1994
Preston Tube Measurements in Low Reynolds Number Turbulent Pipe Flow
| British Library Online Contents | 2000