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首页> 外文会议>ASME(American Society of Mechanical Engineers) Turbo Expo vol.3 pt.A; 20050606-09; Reno-Tahoe,NV(US) >IMPULSE RESPONSE PROCESSING OF TRANSIENT HEAT TRANSFER GAUGE SIGNALS
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IMPULSE RESPONSE PROCESSING OF TRANSIENT HEAT TRANSFER GAUGE SIGNALS

机译：瞬态换热计信号的脉冲响应处理

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摘要

A new, computationally-efficient method is presented for processing transient thin-film heat transfer gauge signals. These gauges are widely used in gas turbine heat transfer research, where, historically, the desired experimental heat transfer flux signals, q, are derived from transient measured surface-temperature signals, T, using numerical approximations to the solutions of the linear differential equations relating the two. The new method uses known pairs of exact solutions, such as the T response due to a step in q, to derive a sampled approximation of the impulse response of the gauge system. This impulse response is then used as a finite impulse response digital filter to process the sampled T signal to derive the required sampled q signal. This is computationally efficient because the impulse response need only be derived once for each gauge for a given sample rate, but can be re-used repeatedly, using optimised Matlab filter routines and is highly accurate. The impulse response method can be used for most types of heat flux gauge. In fact, the method is universal for any linear measurement systems which can be described by linear differential equations where theoretical solution pairs exist between input and output. Examples using the new method to process turbomachinery heat flux signals are given.
机译：提出了一种新的计算有效的方法来处理瞬态薄膜传热计信号。这些仪表被广泛用于燃气轮机传热研究，从历史上看，所需的实验传热通量信号q是从瞬态测得的表面温度信号T导出的，其中使用数值逼近相关的线性微分方程的解他们俩。新方法使用已知的精确解对，例如由于q阶跃引起的T响应，来得出量规系统的脉冲响应的采样近似值。然后，将该脉冲响应用作有限脉冲响应数字滤波器，以处理采样的T信号，以得出所需的采样q信号。这在计算上是有效的，因为对于给定的采样率，对于每个量规仅需要导出一次脉冲响应，但是可以使用优化的Matlab滤波器例程将其重复使用，并且精度很高。脉冲响应方法可用于大多数类型的热通量计。实际上，该方法对于任何可以用线性微分方程描述的线性测量系统都是通用的，其中输入和输出之间存在理论解对。给出了使用新方法处理涡轮机械热通量信号的示例。

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