三维仿真技术由于其高效低成本的特点，广泛应用于高功率密度柴油机的开发中，然而，由于缺乏对仿真模型精度的有效评估方法，其应用受到限制。以柴油定容喷雾仿真模型为研究对象，通过敏感度系数方法确定了13个关键参数（涵盖喷雾初始条件、破碎模型及湍流模型等）对液、气相喷雾贯穿距的影响趋势与程度。在此基础上，通过优选参数配置完成仿真模型标定，并运用统计学方法开展精度评估。结果表明：该仿真模型对液相贯穿距的仿真精度为93.11%，对气相贯穿距的仿真精度为95.95%。研究提出的模型标定与精度评估方法可推广应用于柴油机工作过程仿真领域，为高功率密度柴油机开发中三维仿真技术的实践应用提供理论支撑与技术参考。

Three-dimensional simulation technology is widely employed in the development of high-power density diesel engines due to its efficiency and cost-effectiveness. However, its application is often constrained by the lack of effective methods for evaluating the accuracy of simulation models. Taking a constant-volume diesel spray simulation model as the subject, the sensitivity coefficient method was used to determine the influence trend and degree of 13 key parameters such as initial spray conditions, breakup models and turbulence models on both liquid and vapor phase spray penetration distances. Based on the analysis, the simulation model was calibrated through optimal parameter configuration, and its accuracy was evaluated using statistical methods. The results indicate that the simulation accuracy for liquid phase penetration reaches 93.11%, while that for vapor phase penetration reaches 95.95%. The proposed model calibration and accuracy evaluation methodology can be extended to the simulation of diesel engine working processes, providing theoretical support and technical reference for the practical application of three-dimensional simulation technology in the development of high-power density diesel engines.