Circulation-controlled wind-assisted ship propulsion: Technical innovations for future shipping industry decarbonization

被引:3
|
作者
Li, Ziyan [1 ,2 ]
Tang, Jie [3 ,4 ]
机构
[1] China Ship Sci Res Ctr, Dept Hydrodynam Sci Res, 222 Shanshui East Rd, Wuxi 214082, Peoples R China
[2] Natl Key Lab Hydrodynam, 222 Shanshui East Rd, Wuxi 214082, Peoples R China
[3] Shanghai Jiao Tong Univ, Sch Mech Engn, Key Lab Educ Minist Power Machinery & Engn, 800 Dongchuan Rd, Shanghai 200240, Peoples R China
[4] Shanghai Jiao Tong Univ, Gas Turbine Res Inst, 800 Dongchuan Rd, Shanghai 200240, Peoples R China
关键词
Wind-assisted ship propulsion; Circulation control; Boundary layer control; Energy Efficiency Design Index (EEDI); Lift augmentation; Energy saving and emission reduction; Generalized k- omega (GEKO) model; FLOW; SEPARATION; AIRFOIL;
D O I
10.1016/j.enconman.2024.118976
中图分类号
O414.1 [热力学];
学科分类号
摘要
Amidst mandatory policies aimed at energy savings and emission reductions in the shipping industry, wind- assisted ship propulsion technology has gained prominence for its immediate practicality in promoting environmental sustainability. Wing-sails possess favorable aerodynamic characteristics and adjustable capabilities, yet their efficiency is impeded by flow separation at high angles of attack. This study addressed the challenge of mitigating delayed separation and enhancing lift at large angles of attack for wing-sails through technical solutions involving trailing-edge circulation control and leading-edge boundary layer control. Three-dimensional steady-state flow fields of conventional and circulation-controlled wing-sails were accurately modeled using a Generalized k- omega (GEKO) model across angles of attack ranging from 0 degrees degrees to 30 degrees. degrees . Under moderate jet strength conditions with a velocity ratio of 5, the stall angle of attack of the circulation-controlled wing-sail was delayed by approximately 6 degrees. degrees . Furthermore, compared to a conventional wing-sail, the circulation-controlled variant exhibited a 111 % increase in maximum lift coefficient and a 120 % rise in maximum resultant force coefficient. The energy-saving and emission reduction benefits of implementing this innovative technology were quantified using the Energy Efficiency Design Index (EEDI) on a real very large crude carrier (VLCC). The circulation- controlled wing-sail demonstrated a 10.38 % reduction in EEDI under optimal operating conditions with medium jet strength, compared to an unassisted vessel. Moreover, this reduction was enhanced by 77.55 % compared to incorporating a conventional wing-sail. These discoveries signify an advancement in wind-assisted ship propulsion technology on an innovative frontier, promising greater energy utilization and reduced fuel consumption, thereby facilitating the achievement of stringent green ship standards.
引用
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页数:22
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