Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Design of Wake Equalizing Ducts using RANSE-based SBDO
Highlights Energy Saving Devices are a straightforward and relatively economic solution for improving the overall propulsive efficiency of the ship. Among ESD, Wake Equalizing Ducts act to reduce the wake losses, improve the propeller-hull interaction and generate an additional thrust. Simulation Based Design Optimization tools based on accurate RANS calculations represent an effective design strategy. Optimized WEDs almost doubled the energy saving, also in off-design conditions, with respect to the reference configuration of the Japan Bulk Carrier test case.
Abstract We propose a Simulation-Based Design Optimization (SBDO) approach for the design of an Energy Saving Device (ESD) based on the Wake Equalizing Duct (WED) concept. Pre-Ducts, like Wake Equalizing Ducts, reduce the wake losses, improve the propeller-hull interaction and generate an additional thrust. An integrated design approach, relying on a parametric description of the duct geometry of the WEDs and on a RANSE method, managed by a global convergence optimization algorithm, is developed to maximize the delivered thrust. The Japan Bulk Carrier (JBC) test case, for which model scale experimental data on the effectiveness of the WED are available in the literature, is considered as a baseline. Results obtained by using the adaptive, fully automated proposed design framework highlight significant improvements of the overall propulsive efficiency when the Pre-Duct design is tailored to the actual hull wake shape. In addition, off-design conditions are considered to verify the robustness of the proposed designs with respect to variations of the working point and discuss the opportunity of a robust optimization process.
Design of Wake Equalizing Ducts using RANSE-based SBDO
Highlights Energy Saving Devices are a straightforward and relatively economic solution for improving the overall propulsive efficiency of the ship. Among ESD, Wake Equalizing Ducts act to reduce the wake losses, improve the propeller-hull interaction and generate an additional thrust. Simulation Based Design Optimization tools based on accurate RANS calculations represent an effective design strategy. Optimized WEDs almost doubled the energy saving, also in off-design conditions, with respect to the reference configuration of the Japan Bulk Carrier test case.
Abstract We propose a Simulation-Based Design Optimization (SBDO) approach for the design of an Energy Saving Device (ESD) based on the Wake Equalizing Duct (WED) concept. Pre-Ducts, like Wake Equalizing Ducts, reduce the wake losses, improve the propeller-hull interaction and generate an additional thrust. An integrated design approach, relying on a parametric description of the duct geometry of the WEDs and on a RANSE method, managed by a global convergence optimization algorithm, is developed to maximize the delivered thrust. The Japan Bulk Carrier (JBC) test case, for which model scale experimental data on the effectiveness of the WED are available in the literature, is considered as a baseline. Results obtained by using the adaptive, fully automated proposed design framework highlight significant improvements of the overall propulsive efficiency when the Pre-Duct design is tailored to the actual hull wake shape. In addition, off-design conditions are considered to verify the robustness of the proposed designs with respect to variations of the working point and discuss the opportunity of a robust optimization process.
Design of Wake Equalizing Ducts using RANSE-based SBDO
Furcas, Francesco (Autor:in) / Vernengo, Giuliano (Autor:in) / Villa, Diego (Autor:in) / Gaggero, Stefano (Autor:in)
05.02.2020
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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