INTELLIGENT AIRFOIL FOR PREVENTING FLOW SEPARATION

用于防止流动分离的智能翼型

• 批准号: 07555381
• 负责人: TSUKAMOTO Hiroshi
• 金额: $ 2.11万
• 依托单位: KYUSHU INSTITUTE OF TECHNOLOGY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (A)
• 财政年份: 1995
• 资助国家: 日本
• 起止时间: 1995 至 1997
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-07555381/
• 关键词: Flow Control; Intelligent Airfoil; Flow Separation; Actuator; Sensor; Shape Memory Alloy; Processor; Stall; 光ファイバー; 圧力センサ; アクティブコントロール; 非定常流

An intelligent airfoil was designed to incorporate sensor, prcessor and actuator for preventing the flow separation from airfoilsurface. The original airfoil was cut in two, and thus the airfoil consists of the leading and trailing parts, which are connected by shape memory alloys (SMA) rods. The airfoil shape was changed by actuating the SMA actuators so that its incidence angle can be decreased for the suppression of the flow separation, once flow separation from the airfoil surface were detected by sensor. Various sensors were tested to detect the flow separation from airfoil surface effectively ; optical fiber sensor to detect the flow at the clearance between the leading and trailing parts of developed airfoil, pressure distribution sensor using pressure sensitive rubber, liquid crystal paint, hot film sensor allay, and piezo-electric crystal. The responses of these sensors to flow separation were tested, but there are problems on the reliability of sensors characteristics. Output signal from sensor is processed for the judgment of flow separation, and then control signal is sent to the actuator once now separation were detected after the judgments. The developed intelligent airfoil was tested in wind tunnel, and it was found to be effective for preventing the flow separation.

智能翼型设计包含传感器、处理器和执行器，以防止气流从翼型表面分离。原始翼型被切成两部分，因此翼型由前部和尾部组成，前部和尾部通过形状记忆合金（SMA）杆连接。一旦传感器检测到翼型表面的流动分离，通过驱动 SMA 致动器来改变翼型形状，从而可以减小其入射角以抑制流动分离。对各种传感器进行了测试，以有效检测翼型表面的流动分离；开发的机翼前部和尾部间隙处的流量检测用光纤传感器，采用压敏橡胶、液晶涂料、热膜传感器垫片和压电晶体的压力分布传感器。测试了这些传感器对流动分离的响应，但传感器特性的可靠性存在问题。对传感器的输出信号进行处理以判断流动分离，判断后一旦检测到分离，则向执行器发送控制信号。所开发的智能翼型在风洞中进行了测试，发现它可以有效防止流动分离。

项目成果

Tanaka,K.: "Unsteady Separation and Dynamic Lift Around an Airfoil Undergoing Piching Motion" Proceedings of the ASME Fluid Engineering Division Summer Meeting. SM97・366. 1-8 (1997)

Tanaka, K.：“正在进行俯仰运动的机翼周围的不稳定分离和动态升力”ASME 流体工程部门夏季会议记录 1-8 (1997)。

UNO,M., NISHI,M., and TSUKAMOTO,H.: "Development of a Pressure Distribution Sensing System for Unsteady Flow Measurement Using Conductive Rubber" Proceedings of the 3rd International Conference on Fluid Dynamic Measurement and Its Applications, Modern Tec

UNO,M.、NISHI,M. 和 Tsukamoto,H.：“利用导电橡胶开发用于非稳态流量测量的压力分布传感系统”第三届流体动态测量及其应用国际会议论文集，Modern Tec

宇野 美津夫: "圧力分布センシングシステムと変動圧力場計測" ターボ機械. 25・6. 310-319 (1997)

Mitsuo Uno：“压力分布传感系统和脉动压力场测量”涡轮机械25・6。

Tanaka, K.: "Unsteady Separation and Dynamic Lift Around an Airfoil Undergoing Piching Motion" Proceedings of the ASME Fluid Engineering Division Summer Meeting. SM97・366. 1-8 (1997)

Tanaka, K.：“正在进行俯仰运动的机翼周围的不稳定分离和动态升力”ASME 流体工程部门夏季会议记录 1-8 (1997)。

宇野美津夫・塚本寛: "圧力分布センシングシステムと変動圧力場計測" ターボ機械. (1997)

Mitsuo Uno 和 Hiroshi Tsukamoto：“压力分布传感系统和脉动压力场测量”涡轮机械 (1997)。