Integrated Computational and Experimental Method for Flow Problems
流动问题的综合计算与实验方法
基本信息
- 批准号:10650157
- 负责人:
- 金额:$ 1.92万
- 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:1998
- 资助国家:日本
- 起止时间:1998 至 1999
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
Numerical analysis and experiment are common tools in flow analysis. Each of these methods, however, has own shortcomings. The result of numerical analysis inherently depends on the mathematical model and the computational grid. A consistent way of validation of numerical solutions has not been established yet. Evaluation of result is relatively easy in experiment, but it usually gives only limited information of the whole flow field. It is, therefore, desirable to establish a new analysis methodology in which the numerical and experimental methods are integrated to compensate their shortcomings.In the present research the concept of "observer" in automatic control theory is applied to flow problems. In the observer the state of the physical system in asymptotically estimated from the mathematical model to which the measurement data are fed back in real time. The SIMPLER-based numerical simulation algorithm is used as the mathematical model and the boundary condition and/or external force terms are modified based on the difference between the experimental measurement and computational result. Validity of the present flow observer was examined through numerical analysis for the turbulent flow in a square duct. Possibility in application to turbulent flow control was also studied. The fundamental grid convergence property of numerical methods, and characteristics of the collapsible tube flow system, in which the flow and the tube deformation interact, were investigated as the basic understandings of the future research.These results give fundamental information in establishing the new methodology to deal with especially complex flow problems to which conventional methods in experiment or computation do not apply effectively.
数值分析和实验是流动分析的常用工具。然而,这些方法中的每一种都有自己的缺点。数值分析的结果固有地依赖于数学模型和计算网格。一个一致的方法验证的数值解尚未建立。实验结果的评价相对容易,但往往只能给出有限的流场信息。因此,有必要建立一种新的分析方法,其中的数值和实验方法相结合,以弥补其缺点。在本研究中,自动控制理论中的“观察器”的概念被应用到流动问题。在观测器中,物理系统的状态是从数学模型中渐近估计的,测量数据是真实的实时反馈到数学模型中的。采用基于SIMPLER的数值模拟算法作为数学模型,并根据实验测量值与计算结果之间的差异对边界条件和/或外力项进行修正。通过对方管内湍流流动的数值分析,验证了该观测器的有效性。并探讨了应用于湍流控制的可能性。研究了数值方法的基本网格收敛性和流动与变形相互作用的可折叠管流动系统的特性,为建立新的方法来处理传统的实验或计算方法无法有效处理的特别复杂的流动问题提供了基础信息。
项目成果
期刊论文数量(40)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
早瀬敏幸: "乱流場のフィードバック制御"流体科学シンポジウム講演論文集. 57-60 (1999)
Toshiyuki Hayase:“湍流流场的反馈控制”流体科学研讨会论文集 57-60 (1999)。
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Satoru Hayashi, Toshiyuki Hayase and Hiroshi Kawamura: "Numerical Analysis for Stability and Self-Excited Oscillation in Collapsible Tube Flow"Journal of Biomechanical Engineering, Transactions of the ASME. Vol. 120. 468-475 (1998)
Satoru Hayashi、Toshiyuki Hayase 和 Hiroshi Kawamura:“可伸缩管流稳定性和自激振荡的数值分析”生物机械工程学报,ASME 汇刊。
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早 瀬 敏 幸: "オブザーバを用いた乱流場のフィードバック制御" 計測自動制御学会第13回流体制御シンポジウム講演論文集. 12-16 (1998)
Toshiyuki Hayase:“使用观测器对湍流流场进行反馈控制”第 13 届仪器与控制工程师学会流体控制研讨会论文集 12-16 (1998)。
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早瀬敏幸: "オブザーバを応用した流れ場の仮想計測"日本鉄鋼協会計測・制御・システムエ学部会シンポジウム「計測とシミュレーション技術」講演論文集. 33-40 (1998)
Toshiyuki Hayase:“使用观察器对流场进行虚拟测量”日本钢铁研究所测量、控制和系统工学部研讨会“测量和模拟技术”论文集33-40(1998)。
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Toshiyuki Hayase and Satoru Hayashi: "Feedback Control of Turbulent Duct Flow with State Observer (Effect of Sampling Time)"Preprint of the 76th JSME Fall Annual Meeting. Vol. 3. 293-294 (1998)
Toshiyuki Hayase 和 Satoru Hayashi:“状态观察器对湍流管道流的反馈控制(采样时间的影响)”第 76 届 JSME 秋季年会预印本。
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HAYASE Toshiyuki其他文献
HAYASE Toshiyuki的其他文献
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{{ truncateString('HAYASE Toshiyuki', 18)}}的其他基金
Spatio-temporal analysis of blood flow in bifurcation of blood vessel using ultrasonic-measurement-integrated simulation
超声测量集成模拟血管分叉处血流时空分析
- 批准号:
24360064 - 财政年份:2012
- 资助金额:
$ 1.92万 - 项目类别:
Grant-in-Aid for Scientific Research (B)
Clarification of Endothelial Cells' Response to Flow Force andInclined Centrifugal Force
阐明内皮细胞对流动力和倾斜离心力的反应
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23650252 - 财政年份:2011
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$ 1.92万 - 项目类别:
Grant-in-Aid for Challenging Exploratory Research
Time-dependent blood flow analysis with measurement coupled simulation
通过测量耦合模拟进行时间依赖性血流分析
- 批准号:
19360080 - 财政年份:2007
- 资助金额:
$ 1.92万 - 项目类别:
Grant-in-Aid for Scientific Research (B)
Development of Hybrid Wind Tunnel Through Integration of Supercomputer and Experimental Wind Tunnel
超级计算机与实验风洞集成开发混合风洞
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11555053 - 财政年份:1999
- 资助金额:
$ 1.92万 - 项目类别:
Grant-in-Aid for Scientific Research (B).
Positive Utilization of Nonlinearity of Fluid Control Systems
积极利用流体控制系统的非线性
- 批准号:
06650190 - 财政年份:1994
- 资助金额:
$ 1.92万 - 项目类别:
Grant-in-Aid for General Scientific Research (C)
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