Validación Mediante Ensayos en Laboratorio Del Modelo Matemático Para El Análisis De Transitorios Hidráulicos Con Bolsas De Aire Atrapado

In this paper analytical and experimental results are presented for the study of entrapped air pockets in a pipeline of irregular profile. The analytical results are obtained from a general model, presented by the authors in previous works, based on a liquid and pipe rigid approach and assuming for the gas a polytropic compression decompression behaviour. Laboratory results show, for a polytropic index n = 1,4, a very good agreement with theoretical results until the filling column reaches the highest point fo the pipe. From that point, and due to the failure of the basic hypothesis, a well-defined air-water cross section interface, the discrepancies are relevant.