Contribution to the modelling of characteristics of similar valves and model evaluation
Dragan Kne�evi�
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.