The test results

In this chapter are presented the experiments and experimental measurements obtained in the two full-scale fire tests performed in the Morgex North tunnel, where both the HRR and ventilation velocity were measured as a function of time. It is initially described how the fire scenarios were designed and operated, then the obtained experimental results are presented and compared to the numerical predictions of CFD simulations of the same fire scenarios. In this chapter the discussion is initially focused on the comparison with analytical models and empirical correlations based on theoretical analysis and literature measurements obtained in other tunnel fire tests. The Morgex fire tests allowed to collect different measurements (temperature, air velocity, smoke composition, pollutant species) useful for validating and improving new and existing CFD codes and for testing the real behaviour of a tunnel and its safety systems during a diesel oil fire with a significant Heat Release Rate (HRR).