紧凑式换热面瞬态实验中的全程直接配比法

An Improved Direct Matching Method Of The Transient Testing Technique For Compact Heat Exchanger Surfaces

在紧凑式换热面的瞬态实验中，为获得准确的实验结果，不仅要建立符合试验工况的理 论解，而且还要选择合适的配比方法，以便尽可能减小测量误差对配比结果的影响．本文就瞬态实 验的配比，提出了一种新的基于计算机的全程直接配比法，由于它采用了所有可用测试点进行配 比并且其理论解与实测值的配比误差是通过最小搜索步长来控制的，因此，实验结果的准确性和 可靠性优于通常应用的间接配比法和选点配比法．

In the transient test for compact heat exchanger surfaces,to obtain accu-- rate test results, an appropriate matching method, based on the solution of the transient model fit to the test condition, should be chosen so that the measurement uncertainty of the test is minimized. For that, a computerized omnirange direct matching method is introduced in the paper. its matching precision degree is dominated by the minimum search step size and its reliability is better than that of the point selection matching method and the indirect matching methods.