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

• 批准号: 11555053
• 负责人: HAYASE Toshiyuki
• 金额: $ 8.77万
• 依托单位: Tohoku University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B).
• 财政年份: 1999
• 资助国家: 日本
• 起止时间: 1999 至 2000
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-11555053/
• 关键词: Fluid Dynamics; Experimental Wind Tunnel; Numerical Wind Tunnel; Hybrid Wind Tunnel; Flow Observer; Flow Analysis; Supercomputer; Karman Vortex Street

This research project aims to establish a new analysis methodology to complex flow problems. Through integration of numerical wind tunnel and experimental wind tunnel, a "Hybrid Wind Tunnel" was developed. First, an experimental wind tunnel was constructed and was connected to the supercomputer system of the Institute of Fluid Science, Tohoku University through a Gigabit Ethernet. As a fundamental flow field, Karman Vortex Street in the wake of a square column in a uniform flow was investigated. A pressure signal on a side wall of the column is fed back to the real-time computation to reduce the estimation error. After some transient, the computational result for the flow field converges to the real flow. The feedback law was optimized through numerical simulation and confirmed by experiment. Using pressure measurement on both sides of the square column, the computational result well converges to the real unsteady flow including the effect of perturbations initially existent in the main flow. Real time computation is essential in the hybrid wind tunnel and is explored through parallel computing. Blood flow control in living bodies and aerodynamic drag reduction of vehicles by feedback control are also investigated as possible application of hybrid wind tunnel.

本研究旨在建立一种新的复杂流动问题的分析方法。将数值风洞与实验风洞相结合，研制了“混合风洞”。首先，构建了实验风洞，并通过千兆以太网与东北大学流体科学研究所的超级计算机系统连接。本文研究了均匀流场中方柱尾流中卡门涡街的基本流场。将塔侧壁上的压力信号反馈到实时计算以减小估计误差。经过一段过渡后，流场的计算结果收敛于真实的流动。通过数值仿真优化了反馈律，并通过实验验证了反馈律的有效性.通过对方柱两侧压力的测量，计算结果很好地收敛于包含主流初始扰动影响的真实的非定常流。真实的实时计算在混合风洞中是必不可少的，并通过并行计算进行了探索。作为混合风洞的可能应用，还研究了活体血液流动控制和通过反馈控制减小飞行器的气动阻力。

项目成果

井小萩利明: "気泡崩壊および液滴衝突による材料変形挙動の数値的研究"ターボ機械協会誌. 28巻2. 37-46 (2000)

Toshiaki Ikohagi：“气泡破裂和液滴碰撞导致的材料变形行为的数值研究”，涡轮机械学会杂志，第 28 卷，第 37-46 卷（2000 年）。

早瀬敏幸: "実験風洞と数値解析を統合したハイブリッド風洞に関する基礎的研究(カルマン渦列の解析)"日本機械学会2000年度年次大会講演論文集. Vol.IV. 303-304 (2000)

Toshiyuki Hayase：“结合实验风洞和数值分析的混合风洞基础研究（卡门涡街分析）”日本机械工程师学会 2000 年年会论文集第 303-304 卷（2000 年）。

Toshiyuki Hayase: "Verification of One-Dimensional Models of Collapsible Tube Flow Based on Three-Dimensional Calculation of Tube Deformation"Reports of the Institute of Fluid Science, Tohoku University. 12. 23-33 (2000)

Toshiyuki Hayase：《基于管变形三维计算的可溃管流一维模型验证》东北大学流体科学研究所的报告。

Toshiyuki Takagi: "Magnetic properties of Ni2+xMn1-xGa (shape memory alloy)"J.Magn.Soc.Japan. 23-1. 626-627 (1999)

Toshiyuki Takagi：“Ni2 xMn1-xGa（形状记忆合金）的磁性”J.Magn.Soc.Japan。

福西祐: "後退円柱境界層中の流線曲率不安定波の構造に関する数値シミュレーションによる研究"日本機械学会1999年次大会講演論文集. 11-12 (1999)

福西裕：“后退圆柱边界层流线曲率不稳定波结构的数值模拟研究”日本机械工程学会1999年年会论文集11-12（1999）。