Calculation and analysis of relative atomization characteristics of diesel distillate and low-viscosity marine fuel

The results of calculations of relative atomization characteristics for diesel distillate and low-viscosity marine fuel are presented. The analysis shows that, compared to diesel fuel, the atomization of low-viscosity marine fuel is characterized by greater non-uniformity and increased droplet size. This slows the combustion process and shifts heat generation to the expansion line. As a result, converting a diesel engine to low-viscosity marine fuel leads to increased specific consumption, exhaust gas temperature, and harmful emissions. To improve the operational properties of low-quality fuels, a method of preliminary treatment using a high-voltage electric charge was developed and implemented. Results of trial tests of a diesel engine running on modified fuel are presented. Based on the calculations and investigation of spray parameters, factors contributing to reduced efficiency of marine diesel engines when using heavy fuels were identified. A method for increasing energy efficiency and reducing the negative environmental impact of marine diesel engines operating on low-cost, low-quality fuel was proposed. This approach is both economically justified and environmentally efficient for improving the performance of marine diesel engines running on poor-quality heavy fuels and can be recommended for widespread use in the shipping industry.