CFD Simulation of a DME Fuelled CI Engine

A computational study is conducted for a DME fuelled CI engine of 373.3 cm3 displacement and 17.8 compression ratio at moderate load with detailed chemistry. Due to the symmetry of the cylinder, the simulations are conducted on a sector of the cylinder, from the closing of intake valve to the opening of exhaust valve. In the pilot injection strategy employed, 10% of the total fuel is injected during the pilot injection and the balance in the main injection at 50 BTDC. The computational model is first validated using the experimental data. Results show two-stage ignition characteristic for the DME injected in the pilot injection.

Experimental Research on Premixed Porous Media Combustion in Multiple Ejection/Tangential Burner

In this paper, the experimental research of porous media combustion was carried on premixed combustion of multiple ejection/tangential burner, the ignition characteristic, the resistance characteristics and the temperature distribution in the burner were obtained, and the experimental results were analyzed in detailed, which can provide references for the improvements of novel porous medium burner.

Research on Ignition Characteristic of Short-Circuit Fault

Under voltage of 220V, this article has carried out ignition test of three categories of combustible substance including polyurethane foam, cotton cloth and newspaper by simulation of short-circuit fault of aluminum conducting wire, so as to get the characteristic parameters of ignition of combustible substance due to short-circuit bead at different heights, summarize the distribution of fire origins for ignition of polyurethane foam due to short-circuit bead at different heights, and provide detailed fundamental data and effective technical support to fire disaster researchers of primary-level fire protection during onsite investigation.