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表面热流的可辨识性分析可用于飞行器防热层内温度测量精度和测温点位置的确定,在工程上有较强的实用意义。从无量纲分析和仿真辨识出发,根据防热层材料热物性系数、测点位置、表面热流的频域特性等参数对表面热流辨识结果的影响规律,总结出了表面热流辨识问题的相似参数:基于表面热流频率参数的傅立叶数。此后,以这一傅立叶数为判据,针对不同测量误差值的情况初步建立起了表面热流可辨识性的准则和分析方法。
The identification of surface heat flow can be used to determine the temperature measurement accuracy and the location of the temperature-measuring point in the heat-insulating layer of the aircraft, which has strong practical significance in engineering. Based on dimensionless analysis and simulation, according to the influence of the thermal physical property coefficient, the location of the measuring point and the frequency domain characteristics of the surface heat flow on the identification results of the surface heat flow, the similar parameters of the surface heat flow identification are summarized. Fourier Number Based on Surface Heat Flow Frequency Parameters. Thereafter, based on this Fourier number, criteria and analytical methods for recognizing surface heat flow were initially established for different measurement error values.