Simulation Analysis of Emission Characteristics of WD615.99 Engine Based on AVL-FIRE EGR Strategy
Year: 2026
Type: conference-paper
Abstract: To optimize emission performance of the WD615 heavy-duty diesel engine and meet increasingly stringent environmental regulations, this study focuses on the WD615.99 high-pressure common rail diesel engine. Using AVL-FIRE computational fluid dynamics (CFD) simulation software, a three-dimensional simulation model was developed to balance accuracy and efficiency in modeling the in-cylinder working process. By integrating advanced engine manufacturing technologies, high-performance material applications, and optical diagnostic techniques, the study analyzes variation patterns of combustion characteristics such as in-cylinder pressure, temperature, and heat release rate. Results indicate that dimethyl ether (DME), characterized by high oxygen content (34.8%) and low molecular weight, enhances combustion completeness and significantly reduces soot emissions. However, DME blending ratios exceeding 30% lead to engine performance degradation and a sharp increase in NOx emissions. Increasing EGR rates effectively suppresses NOx emissions (a 61.8% reduction at 30% EGR rate under high load conditions), while excessive EGR (over 15%) causes substantial increases in CO and HC emissions.
Authors: Jiangyong Xiong, Chongchong Li
Institution: Nanjing Vocational College of Information Technology
Language: English
Subfield: Fluid Flow and Transfer Processes
Field: Chemical Engineering
Domain: Physical Sciences
SDG: Climate action
Open Access status: hybrid
OpenAlex ID: W7202367070