Contribution to the modelling of characteristics of similar valves and model evaluation
Dragan Kneževiæ
The methods for valve characteristics modelling have been defined along with the evaluation of the obtained model’s level of agreement with the experimental results. In the evaluation of model suitability, based on the Fisher’s criterion when a model inadequacy probability happens to be 95[%] (or 99[%]), the classical method theory of mathematical statistics demands that such models be rejected. The question is: to reject a model or to define a method for qualita-tive evaluation of models. This paper has the objective to give the right answer to this dilemma. In cases where the methods or mathematical statistics do not give a complete answer concerning model evaluation, the idea proposed in this study is that it is necessary to define methods of the analytical-qualitative assessment of the obtained model’s level of agreement with the test results. This study gives the answer to the given dilemma.
Key words: ventilation, valve, antishock valve, aerodynamics, resistance coefficient, modelling method.