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从基本原理、关键技术和验证应用三个方面总结了近两年在中国空气动力研究与发展中心激波风洞中开展的温敏涂层(TSP)技术相关研究工作。通过解决快速响应温敏发光材料研制、模型研制、数据处理等一系列关键技术,完成图像采集系统、光学系统及标定系统的配套和系统集成,建立了一套适于激波风洞试验的高速TSP测量及标定系统。该技术可在激波风洞试验中获取模型被测面温敏涂层的发光图像,基于该图像可以直接观察模型表面热流分布和捕捉峰值热流的准确位置。结合温敏发光材料的物性参数标定数据,能够实现对模型表面热流的定量测量。不同于传统的传感器点热流测量技术只能得到模型表面有限数量的离散点的热流值,TSP技术能够以高空间分辨率得到较大面积区域的详细热流分布信息,可更加全面的测量模型外表面的热环境,并且可以据此进一步分析和辨别边界层流态以及确定边界层转捩位置。试验对比表明,TSP技术的测量结果与点热流传感器的测量结果具有良好的一致性。目前该技术已趋于成熟,在Φ2m和Φ0.6m激波风洞上成功应用于边界层转捩研究、局部干扰区热环境研究和复杂外形飞行器热环境研究等领域,已成为激波风洞除点测热技术之外又一重要测热技术。
From the basic principles, the key technologies and the application of the verification, the research work on the temperature-sensitive coating (TSP) technology carried out in the wind tunnel of China Aerodynamic Research and Development Center in recent two years is summarized. By solving a series of key technologies, such as the development of rapid response temperature-sensitive luminescent materials, model development and data processing, the complete and systematic integration of image acquisition system, optical system and calibration system were completed and a set of high speed TSP measurement and calibration system. This technique can obtain the luminescence image of the temperature-sensitive coating on the surface of the model under shock wind tunnel test. Based on the image, the distribution of the heat flow on the model surface and the exact location of the peak heat flux can be directly observed. Combined with the calibration data of temperature-sensitive luminescent materials, the quantitative measurement of heat flux on the model surface can be achieved. Different from the traditional sensor point heat flow measurement technology can only get a limited number of discrete points on the model surface heat flow value, TSP technology with high spatial resolution of the larger area of ?? detailed heat flow distribution information can be more comprehensive measurement of the model outer surface The thermal environment can be further analyzed and discerned between the boundary layer and the boundary layer. The experimental comparison shows that the measurement result of TSP technology is in good agreement with the result of point heat flow sensor. At present, the technology has become mature and successfully applied to the research on boundary layer transition in the Φ2m and Φ0.6m shock wind tunnels, the research on the thermal environment in the localized interference area and the research on the thermal environment of the complex shape aircraft, In addition to point measurement of thermal technology is another important heat measurement technology.