Flow-structure interaction of the parachute in inflation process

降落伞充气过程中的流-结构相互作用

基本信息

  • 批准号:
    17360409
  • 负责人:
  • 金额:
    $ 3.92万
  • 依托单位:
  • 依托单位国家:
    日本
  • 项目类别:
    Grant-in-Aid for Scientific Research (B)
  • 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

项目摘要

The parachute has a strong flexibility because it is made of a fabric. Therefore, the instantaneous shape is formed by the difference between within and outside it. It is so hard to analyze the fluid-structure interaction for the parachute because of the flexibility. Even if we would apply for the rigid parachute as a first order approximation, we happen to meet the strong non-linearity between the body and the wake. In this investigation, the dynamic motion of it is focused by using the numerical simulation and the water tunnel experiment, in which the flow fluctuations around the parachute are focused.First, the parachute is assumed as a rigid rounded hemisphere body, in which it is not deformed. The motion of the parachute shows the pendulum motion, in which the virtual mass (added mass) effect plays an important key because of the accelerating motion. In order to get data precisely, the high accuracy simple approximation method is proposed to apply for it.In order to catch the inflation process of it, the 2 dimensional numerical simulation has been carried out. When the folded parachute is inflated, the snatched force is caught in detail in our simulation.Second, after the effect of the virtual mass and the flexible wall model are discussed, the 3 dimensional simulation has been carried out. The flow structure is clarified by he numerical results together with the experimental results (flow visualization). The oscillation patterns of it are classified into three categories (lineal ; arc, circular motions). Furthermore, the guide of the parachute study into future is shown.
降落伞有很强的柔韧性,因为它是由布料制成的。因此,瞬时形状是由其内部和外部的差异形成的。降落伞具有一定的柔性,其流固耦合分析十分困难。即使我们会申请刚性降落伞作为一阶近似,我们也会碰巧遇到物体和尾迹之间的强烈非线性。本文采用数值模拟和水洞实验相结合的方法,对降落伞的动态运动进行了研究,首先将降落伞假定为一个没有变形的刚性圆球形体,并对降落伞的运动进行了研究。降落伞的运动表现为单摆运动,其中由于加速运动,虚质量(附加质量)效应起着重要的作用。为了获得准确的数据,提出了高精度的简单逼近方法,并对其进行了二维数值模拟,以捕捉其膨胀过程。其次,在讨论了虚拟质量和柔性壁模型的影响后,对折叠降落伞进行了三维仿真。数值计算结果与实验结果(流动显示)相结合,阐明了流动结构。它的振荡模式可分为三类(直线运动、圆弧运动、圆周运动)。并对今后降落伞研究的方向进行了展望。

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)
Dynamic Characteristics of the 3-dimensional Parachute-like Body after Inflation Process
三维降落伞体充气后的动态特性
  • DOI:
  • 发表时间:
    2008
  • 期刊:
  • 影响因子:
    0
  • 作者:
    ARAI;N
  • 通讯作者:
    N
可撓壁を有する振動物体まわりの流れ
具有柔性壁的振动物体周围的流动
  • DOI:
  • 发表时间:
    2007
  • 期刊:
  • 影响因子:
    0
  • 作者:
    新井紀夫;藤村弘太;高倉葉子
  • 通讯作者:
    高倉葉子
Inflation process and free oscillation of flexible parachute-like body
  • DOI:
    10.2514/6.2005-1610
  • 发表时间:
    2005-05
  • 期刊:
  • 影响因子:
    0
  • 作者:
    N. Arai;Kensaku Suzuki
  • 通讯作者:
    N. Arai;Kensaku Suzuki
凹状物体(パラシュート)の振動特性
凹面物体(降落伞)的振动特性
  • DOI:
  • 发表时间:
    2008
  • 期刊:
  • 影响因子:
    0
  • 作者:
    宝渦寛之;新井紀夫;高倉葉子
  • 通讯作者:
    高倉葉子
Flowfield around a Body with Elastic Walls
弹性壁体周围的流场
  • DOI:
  • 发表时间:
    2008
  • 期刊:
  • 影响因子:
    0
  • 作者:
    ARAI;N.;FUJIKURA;K.;and TAKAKURA;Y.
  • 通讯作者:
    Y.
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ARAI Norio其他文献

ARAI Norio的其他文献

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{{ truncateString('ARAI Norio', 18)}}的其他基金

Unsteady flow around a concave body in supersonic flow
超音速流中凹体周围的不稳定流动
  • 批准号:
    12650893
  • 财政年份:
    2000
  • 资助金额:
    $ 3.92万
  • 项目类别:
    Grant-in-Aid for Scientific Research (C)
Research on Thermoelectric System Utilizing C/C Composites
利用C/C复合材料的热电系统研究
  • 批准号:
    11650778
  • 财政年份:
    1999
  • 资助金额:
    $ 3.92万
  • 项目类别:
    Grant-in-Aid for Scientific Research (C)
Development of High Temperature Gas Turbine using Chemical Flame with New Idea.
新理念开发化学火焰高温燃气轮机。
  • 批准号:
    07505008
  • 财政年份:
    1995
  • 资助金额:
    $ 3.92万
  • 项目类别:
    Grant-in-Aid for Scientific Research (A)
Surface modification of heat-resistive materials for gas turbines and basic analyzes by laser spectroscopy
燃气轮机耐热材料的表面改性及激光光谱基础分析
  • 批准号:
    07455432
  • 财政年份:
    1995
  • 资助金额:
    $ 3.92万
  • 项目类别:
    Grant-in-Aid for Scientific Research (B)
Active Control of Vortex Shedding Frequency by Side-Jets
侧射流涡旋脱落频率的主动控制
  • 批准号:
    07650189
  • 财政年份:
    1995
  • 资助金额:
    $ 3.92万
  • 项目类别:
    Grant-in-Aid for Scientific Research (C)
Development of Pressurized Reducing Combustor for over 1500゚C-class Gas turbine
1500℃以上燃气轮机增压减压燃烧室的开发
  • 批准号:
    05555202
  • 财政年份:
    1993
  • 资助金额:
    $ 3.92万
  • 项目类别:
    Grant-in-Aid for Developmental Scientific Research (B)
Fundamental studies on direct conversion from thermalenergy to photo energy using unsfeady exciled state ofmolecales
利用分子不安全激发态直接将热能转化为光能的基础研究
  • 批准号:
    05453093
  • 财政年份:
    1993
  • 资助金额:
    $ 3.92万
  • 项目类别:
    Grant-in-Aid for General Scientific Research (B)
ENHANCEMENT OF HEAT TRANSFER DUE TO THE SEPARATION-REATTACHMENT OF HYPERSONIC FLOW
由于高超声速流的分离-再附着而增强传热
  • 批准号:
    61550043
  • 财政年份:
    1986
  • 资助金额:
    $ 3.92万
  • 项目类别:
    Grant-in-Aid for General Scientific Research (C)

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职业:极端​​水动力条件下沿海流固耦合的开源 GPU 加速计算基础设施
  • 批准号:
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