2026-04-17T02:47:32Zhttps://recercat.cat/oai/request

oai:recercat.cat:2117/1050262025-07-17T04:58:38Zcom_2072_1033col_2072_452950

00925njm 22002777a 4500 dc Muela Castro, Jordi author Lehmkuhl Barba, Oriol author Oliva Llena, Asensio author Ventosa Molina, Jordi author 2013 The autoignition process of a hydrogen jet into a preheated turbulent air stream is numerically studied. A Progress-variable (PV) model with the turbulence-chemistry interactions modelled using a Presumed Conditional Moment (PCM) closure has been used. Furthermore, the same case is studied using a Finite Rates model without closure for the reaction rate. The PV-PCM model reproduces satisfactorily the physical behaviour found in the experiments, although the model tends to underpredict the autoignition length. The results of the Finite Rates model also capture accurately the autoignition phenomenology observed experimentally and the autoignition lengths are closer to those obtained in the experiment. Peer Reviewed Postprint (published version) Àrees temàtiques de la UPC::Enginyeria mecànica::Mecànica de fluids Turbulence-- Numerical simulation Hydrogen Turbulència -- Simulació numèrica Hidrogen -- Combustió Large eddy simulation of hydrogen autoignition in a preheated turbulent co-flow