Numerical Investigation for Wall Film Flow Behaviors on Convex and Concave Surfaces of Curved Channel

doi:10.7652/xjtuxb201711004

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Numerical Investigation for Wall Film Flow Behaviors on Convex and Concave Surfaces of Curved Channel

更新时间：2025-07-09

- Numerical Investigation for Wall Film Flow Behaviors on Convex and Concave Surfaces of Curved Channel
- Vol. 51, Issue 11, Pages: 22-28(2017)
- 作者机构：
  
  1. 西安交通大学叶轮机械研究所,西安,710049
  2. 陕西省叶轮机械及动力装备工程实验室,西安,710049
- 作者简介：
- 基金信息：
- DOI：10.7652/xjtuxb201711004
  CLC： TK263.3
- Online First：10 November 2017，
  
  Published：2017
- 稿件说明：
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Numerical Investigation for Wall Film Flow Behaviors on Convex and Concave Surfaces of Curved Channel[J]. 2017, 51(11): 22-28.
DOI：

Numerical Investigation for Wall Film Flow Behaviors on Convex and Concave Surfaces of Curved Channel[J]. 2017, 51(11): 22-28. DOI： 10.7652/xjtuxb201711004.

摘要

针对航空发动机吸雨的问题

建立了气流与壁面水膜双向耦合作用的数值分析方法

对弯曲通道中凸、凹表面水膜流动特性进行了数值研究。结果表明:弯曲通道中二次流的作用引起凹面水膜向凸面迁移

在凸面沿垂直流动方向两端形成水膜的聚集区

在凹面的两端则出现水膜厚度减小的现象; 来流马赫数与凸、凹表面水膜厚度成负相关关系

水膜流量与凸、凹表面水膜厚度成正相关关系; 进口气流角增大导致凸面水膜厚度增大、凹面水膜厚度减小; 通道曲率增大引起凸面水膜沿流动方向加剧收缩; 相界面处压力波动是引起水膜波动的原因

水膜厚度的波动幅度与来流马赫数和进口气流角成正相关关系。该结果可为改善航空发动机吸雨引起的气动特性恶化问题研究提供参考。

Abstract

Focusing the problem that running aero-engine absorbs rain droplets

a numerical algorithm is proposed to reveal the coupling flow behavior between gas flow and wall film. The air flow and wall film coupling behavior on convex/concave surfaces are numerically investigated. It is concluded that the wall film migrates from the concave surface to the convex surface because the quadratic flow militates in curved channel. There is a wall film accumulation area on both side of the convex surface along the flow direction

and the thickness of the wall film on both side of the concave surface decreases. The flow Mach number has negative effect on the thickness of the wall film on the convex and concave surfaces. The wall film mass flux has positive effect on the thickness of the wall film on the convex and concave surfaces. The increasing inlet flow angle increases the wall film thickness on the convex surface and decreases the thickness on the concave surface. The wall film on the convex surface contracts along the flowing direction more obviously with the increasing wall-curvature. The wall film fluctuates due to the pressure fluctuation on the phase interface. The flow Mach number and inlet flow angle have positive effect on the intensity of fluctuation of wall film.

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references

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