Title: A large-eddy simulation of diesel-like gas jets

Authors: Sergio Hoyas; Antonio Gil; Juan Manuel Mompó-Laborda; Dung Khuong-Anh

Addresses: CMT – Motores Térmicos, Universidad Politécnica de Valencia, Camino de Vera S/N, 46022 Valencia, Spain. ' CMT – Motores Térmicos, Universidad Politécnica de Valencia, Camino de Vera S/N, 46022 Valencia, Spain. ' CMT – Motores Térmicos, Universidad Politécnica de Valencia, Camino de Vera S/N, 46022 Valencia, Spain. ' CMT – Motores Térmicos, Universidad Politécnica de Valencia, Camino de Vera S/N, 46022 Valencia, Spain

Abstract: Some aspects of the transient evolution of diesel-like gas jets by means of large-eddy simulation (LES) are discussed in this work. In order to understand the relationship between the inlet boundary condition and the development of the turbulent motions of the diesel sprays, a 3D injection chamber is simulated. The main assumption of the setup is the turbulent gas jet theory hypothesis applied to the inlet boundary conditions. Validation of the results is achieved by comparing with both experimental diesel spray measurements and trusted Reynolds-averaged Navier-Stokes (RANS) simulations. Results show that reasonable simulation of turbulent patterns from one diameter distant from the inlet boundary condition is achieved.

Keywords: LES methods; diesel sprays; biphasic flows; large-eddy simulation; turbulent gas jets; inlet boundary conditions; turbulent motion; turbulence.

DOI: 10.1504/IJVSMT.2011.044229

International Journal of Vehicle Systems Modelling and Testing, 2011 Vol.6 No.3/4, pp.268 - 282

Received: 08 May 2021
Accepted: 12 May 2021

Published online: 13 Dec 2011 *

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