A Comparative Study on the Performance of the Flat versus Corrugated Flame Arrester’s Effect used in Explosion Proof Diesel Engine

摘要

As the explosion proof diesel engine (EPD) of underground trackless tyred vehicle dynamic mechanical device, due to its good dynamic and economic performance, the diesel has been widely applied. The flame arrester can prevent the exhaust system from tempering, but the increased resistance will seriously affect the performance of diesel. Through the comparison of the CFD-FLUENT fluid simulation on flow and pressure field, the results show that the corrugated flame arrester performs better on reducing the exhaust back pressure than flat flame arrester and ensures the explosion-proof effect. The bench test of explosion proof diesel engine on intake and exhaust system is conducted, analysing the effect of the exhaust resistance under different speeds of diesel engine on the power, economy and emission of TY4100QFB type diesel engines with equivalent flow area, different specifications of flat versus corrugated flame-arrester in the course of external characteristics. The test results show, on account of the large porosity ratio, the corrugated flame arrester has a significant effect on reducing the intake and exhaust resistance, optimizing combustion, reducing NO_x, CO, PM. What's more, the emissions of CO, NO_x, PM averagely decline by 8.5%、 4.6%、 11.45%, respectively, but output power and fuel consumption has no obvious change. Meanwhile, the design size and weight of the corrugated flame-arrester can be reduced.