Basic Study on the Wind- assisted Propulsion Support System
风助推进支持系统基础研究
基本信息
- 批准号:17560712
- 负责人:
- 金额:$ 2.34万
- 依托单位:
- 依托单位国家:日本
- 项目类别:Grant-in-Aid for Scientific Research (C)
- 财政年份:2005
- 资助国家:日本
- 起止时间:2005 至 2007
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
For the purpose of energy saving of large vessels, basic study on the wind- assisted propulsion support system was conducted, and following conclusions were obtained.1) The concept is a column-type circular cylinder propulsion assistance system which utilize the existing dodger-support structure and air suction power. Flow field around the column is sucked into the engine room through the intake located in the after part of the cylinder. Boundary layer in the near field is controlled and separation free flow field is generated to exert hydrodynamic lift. Model test in a large wind tunnel test indicated that the maximum lift coefficient is about 7.5, lift drag ratio about 1.3, implying a possibility for obtaining useful propulsion thrust for ships.2) Two types of air intake system were investigated, namely, 'punched metal type' and 'slits type'. In terms of the maximum lift and consistency for wind direction, 'slits type' was concluded to be superior to 'punched metal type' for actual ship applications.3) Air volume used for main engine etc. was surveyed on some actual existing ships, and the analysis showed a relation between the possible lift by the sail and required air volume. This implies a possibility of development of circular cylinder sail.4) The flow around the circular cylinder sail was investigated by flow visualization method and hot wire methods. The effect of air suction was clearly indicated to diminish the flow separation region and generate circulation around the cylinder. It is also found that controlling the slit size may contribute to optimize the sail performance at various wind velocity and direction.5) For practical application of the circular cylinder sail, further improvements of sail performance are necessary. To meet this requirement, dynamic control of slit size can be a possible measure introducing louver control system.
以大型船舶节能为目的,对风力辅助推进系统进行了基础研究,得到以下结论:1)该概念是一种利用现有避障器支撑结构和空气吸力的圆柱型圆柱推进辅助系统。圆柱周围的流场通过位于气缸后部的进气口被吸入发动机室。控制近场边界层,产生无分离流场,产生水动力升力。大型风洞模型试验表明,最大升力系数约为7.5,升阻比约为1.3,具有获得舰船有效推进力的可能性。2)研究了“冲压金属型”和“狭缝型”两种进气系统。在最大升力和风向一致性方面,“狭缝型”上级“穿孔金属型”。3)在现有的实际船舶上调查了主机等的风量,分析了帆的可能升力和所需风量之间的关系。4)采用流场显示和热线法对圆柱帆的绕流进行了研究。空气抽吸的效果清楚地表明,以减少流动分离区,并在圆柱周围产生循环。研究还发现,通过控制缝隙的大小,可以优化帆在不同风速和风向下的性能。5)对于圆柱帆的实际应用,还需要进一步改进帆的性能。为了满足这一要求,引入PID控制系统对狭缝尺寸进行动态控制是一种可能的措施。
项目成果
期刊论文数量(0)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
Column-type Circular Propulsion Assistance System, -Part 3 : Development of 2-D Lift/Drag Measurement System under Air Suction Condition-
柱式圆形推进辅助系统,第3部分:吸气条件下二维升力/阻力测量系统的开发-
- DOI:
- 发表时间:2006
- 期刊:
- 影响因子:0
- 作者:H.;Ozaki
- 通讯作者:Ozaki
円筒型風力補助推進装置に関する基礎研究-その4:大型揚抗力計測システムの開発と円筒帆の揚抗力特性-
圆筒形助风推进装置基础研究第4部分:大型升阻力测量系统及圆筒帆升阻力特性研制
- DOI:
- 发表时间:2007
- 期刊:
- 影响因子:0
- 作者:尾崎 伯哉;八木 光;藤井 昭彦;松原 直哉
- 通讯作者:松原 直哉
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YAGI Hikaru其他文献
Pressure Effect on Isotope Fractionation Factor
压力对同位素分馏因子的影响
- DOI:
10.4131/jshpreview.30.85 - 发表时间:
2020 - 期刊:
- 影响因子:0
- 作者:
SANO-FURUKAWA Asami;ITOH Shoichi;SUZUMURA Akimasa;UENO Yuichiro;YAGI Hikaru;INOUE Toru;KAWAZOE Takaaki - 通讯作者:
KAWAZOE Takaaki
YAGI Hikaru的其他文献
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