tailieunhanh - A study on reduced air resistance acting on hull of a cargo river ship by used CFD

The CFD results of aero-dynamic performances of the ship as pressure distribution, velocity flow around hull and air resistance acting on hull are investigated by the CFD. By analysing air resistance acting on a conventional cargo river ship which is widely used in Vietnam, a new concept of cargo river ships with drastically reduced air resistance hull form has been developed. | Journal of Science & Technology 127 (2018) 050-056 A Study on Reduced Air Resistance Acting on Hull of a Cargo River Ship by Used CFD Ngo Van He Hanoi University of Science and Technology, No. 1, Dai Co Viet, Hai Ba Trung, Hanoi, Viet Nam Received: December 18, 2017; Accepted: June 25, 2018 Abstract Aiming to improvement of the inland water transportation efficiency, this paper presents development of new hull concept for the cargo river ships with reduced air resistance by using a commercial CFD (Computational Fluid Dynamic) method. The CFD results of aero-dynamic performances of the ship as pressure distribution, velocity flow around hull and air resistance acting on hull are investigated by the CFD. By analysing air resistance acting on a conventional cargo river ship which is widely used in Vietnam, a new concept of cargo river ships with drastically reduced air resistance hull form has been developed. A suitable method for application of the obtained research results has been suggested namely gradual replacement the current hull form by the newly developed one. Keywords: new hull; reduced air resistance; cargo river ship, CFD, accommodation. 1. Introduction* 2010, studied on reduced wind force acting on a non ballast ship, a new model proposed for the non ballast water ship can reduce up to 44% of wind force in full loaded condition and by 33% of wind force in the ballast condition without ballast water [5]. Mizutani et al., 2013 reported on research of reduced air resistance acting on a chip carrier. The total air resistance can reduce from 2% to 15% by experimental measurement at a towing tank. In the studies, He et al., 2013, 2016, Mizutani et al., 2014, effects of hull shape and cargo handling equipment on air resistance had been investigated. The conclusions were that total air resistance can reduce by 10% by experiment and the interaction between hull shape and accommodation shape on deck as well as wind direction have been looked into [7-9]. Study .