This paper presents a new non-contact transient method for measuring the heat transfer coefficient. The proposed method is based on measuring the temperature response of the surface temperature to the heat flux irradiating the same surface, which is affected by the heat transfer coefficient on the back of the surface. The theoretical solution of this problem together with the measured experimental data then enables an evaluation to be made of the local value of the heat transfer coefficient and the corresponding integral value. We present the theoretical foundations, a description of the required experimental setup, the methodology for evaluating the heat transfer coefficient, and an error analysis. The results of forced convection inside the tubes and the incident geometry of the impinging jets in comparison with the experimental results from the literature are presented as validation experiments. Very good agreement is demonstrated and the experimental results obtained by the proposed method lie in the standard range of 10%.

本文提出了一种新的非接触瞬态方法来测量传热系数。所提出的方法基于测量表面温度对辐照同一表面的热通量的温度响应，该温度响应受表面背面的传热系数影响。该问题的理论解决方案以及所测得的实验数据随后使得能够对传热系数的局部值和相应的积分值进行评估。我们提供了理论基础，所需实验设置的描述，评估传热系数的方法以及误差分析。将管内强制对流的结果和撞击射流的入射几何形状与文献中的实验结果进行比较，作为验证实验。结果表明非常吻合，所提方法获得的实验结果在10％的标准范围内。