采用欧拉法计算水滴收集系数是目前飞机结冰与防除冰理论研究及实际部件应用的主流方法，但欧拉法不能描述水滴汇聚时的轨迹重叠与交叉现象，在复杂表面的计算结果会产生误差，因此需要进行校验。本文直接在传统欧拉法水滴运动场的基础上获取水滴流线，建立基于欧拉流线的水滴收集系数计算方法。通过比较分析欧拉流线法与传统欧拉法结果的异同，来进行欧拉法水滴收集系数有效性的初步校核。在相同的欧拉水滴运动场下进行传统欧拉法与欧拉流线法收集系数算例的计算，结果表明：在没有水滴交汇影响时，两者的水滴收集系数结果一致，且与文献数据符合，验证了欧拉流线法的可行性与欧拉法结果的有效性；当水滴流产生交汇时，受影响的下游表面两者结果不再相同，其区域即为欧拉法水滴收集系数计算结果的无效区。在传统欧拉法基础上提取流线进行水滴收集系数计算与比较分析，可快速完成其有效性的初步校核。论文工作对预测复杂部件表面的水滴撞击特性，准确模拟实际飞机结冰与防除冰过程有重要的帮助。

The Eulerian method for predicting droplet collection efficiency is widely used in both theoretical studies and practical applications of aircraft icing and anti-/de-icing process. The Eulerian method cannot capture the crossing of droplet trajectories during coalescence. On complex surfaces, this may lead to deviations in the computed results, and therefore validation is required. In this study, droplet streamlines are obtained directly from the conventional Eulerian droplet velocity field, and a collection-efficiency calculation method based on Eulerian streamlines is established. The validity of the Eulerian collection efficiency is preliminarily assessed by comparing the differences between the Eulerian streamline method and the conventional Eulerian results. Simulations of collection efficiency cases using the conventional Eulerian method and the Eulerian streamline method were performed under the same Eulerian droplet flow field. The results indicate that, in the absence of droplet coalescence, the collection efficiency results from both methods are consistent and agree with literature data, validating the feasibility of the Eulerian streamline method and the reliability of conventional Eulerian results. When droplet coalescence and trajectory crossing occur, the results on the affected downstream surfaces differ between the two methods, defining the uncertain region of droplet collection efficiency from the conventional Eulerian method. By extracting streamlines from the conventional Eulerian method and performing collection efficiency calculations, a rapid preliminary validation of the Eulerian method can be achieved. This work provides important support for predicting droplet impingement characteristics on complex surfaces as well as accurate simulation in aircraft icing and ice-protection processes.