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基于欧拉法流线的三维表面水滴撞击特性计算方法

申晓斌,叶泽坤,赵静宇,郭洁涛,林贵平   

  1. 北京航空航天大学
  • 收稿日期:2025-09-03 修回日期:2025-12-02 出版日期:2025-12-08 发布日期:2025-12-08
  • 通讯作者: 申晓斌

A New Method Based on Eulerian Droplet Streamline for Impingement Characteristics Calculation on Three Dimensional Surfaces

  • Received:2025-09-03 Revised:2025-12-02 Online:2025-12-08 Published:2025-12-08
  • Contact: Xiao-Bin SHEN

摘要: 飞机及其发动机表面的水滴撞击特性计算是其结冰分析与防除冰系统设计的首要工作。为弥补传统欧拉法与拉格朗日法的不足,建立了一种基于欧拉法流线的三维表面水滴撞击特性计算方法。其仅求解水滴动量方程来获得速度分布,不需要计算水滴连续性方程;通过三维表面网格节点的逆向积分获得水滴流线,进而计算水滴撞击特性,不需要提前确定水滴释放位置与追踪大量的运动轨迹。将所建立的方法应用于三维圆球、发动机整流帽罩及进气道唇口的水滴收集系数计算,计算效率较高,结果与文献数据都吻合较好,验证了基于欧拉法流线的三维表面水滴撞击特性计算方法的可行性与有效性。工作可以为实际飞机与发动机的结冰分析与防除冰系统设计提供参考。

关键词: 飞机结冰, 水滴撞击特性, 欧拉法, 拉格朗日法, 发动机

Abstract: The computation of droplet impingement characteristics on the three-dimensional surface is the primary task for ice accretion analysis and anti-icing/de-icing system design for an aircraft and its engine. To overcome the shortcomings of the traditional Eulerian method and Lagrangian method, a streamline-based Eulerian method was established to obtain three-dimensional surface water droplet impingement characteristic. This method only solves the momentum equation to derive the velocity distribution, and there is no need to calculate the droplet continuity equation. Droplet streamlines are generated via backward integration from the vertices of the three-dimensional surface mesh, allowing impingement characteristics to be calculated without predetermination for droplet release locations or tracking a large number of droplet trajectories. The proposed method is applied to compute droplet collection efficiencies on a three-dimensional sphere, a spinner, and an engine inlet. The results show high computational efficiency and good agreement with the data in the literature, thereby confirming the feasibility and effectiveness of the streamline-based Eulerian method for three-dimensional droplet impingement analysis. This work can provide a reference for the ice accretion analysis and anti-icing/de-icing system design of aircraft and engines.

Key words: Aircraft icing, droplet impingement characteristic, Eulerian method, Lagrangian method, engine

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