Numerical study on water film formation on aerodynamic effect of axial flow fan

被引：0
|
作者：
Hou S. [1 ]
Zhang H. [1 ]
Wu F. [2 ,3 ]
Tian X. [2 ]
Zhou J. [2 ,3 ]
机构：
[1] College of Power and Energy Engineering, Harbin Engineering University, Harbin
[2] Sichuan Gas Turbine Establishment, Aero Engine Corporation of China, Mianyang, 621000, Sichuan
[3] Science and Technology on Altitude Simulation Laboratory, Sichuan Gas Turbine Establishment, Aero Engine Corporation of China, Mianyang, 621000, Sichuan
来源：
Hangkong Dongli Xuebao/Journal of Aerospace Power | 2019年 / 34卷 / 10期
关键词：
Aerodynamic performance; Axial flow fan; Rain ingestion; Sand grain roughness; Water film;
D O I：
10.13224/j.cnki.jasp.2019.10.007
中图分类号：
学科分类号：
摘要：
In order to study the effect of water film on aerodynamic charactristics of the fan, the mean square thickness of water film on blade surface was calculated by using water film equation combined with the parameters of the water droplets colliding with the wall surface. Then the sand grain roughness model was added to the numerical calculation to simulate the change of blade surface roughness caused by water film. Fan blades were numerically simulated under different rain ingestion rates and water droplet diameters. Results indicate that water film mainly distributes in the leading edge and root region of blade pressure surface. The water film's thickness and depositional area are positively correlated with rain ingestion rate. In addition, the existence of water film can reduce the pressure ratio and temperature ratio of the fan. When the average diameter of the water droplet is 1000μm and the rain ingestion rate is 5%, the water droplet depositional area is 0.0758m2, accounting for 33.91% of the pressure surface area of the blade. © 2019, Editorial Department of Journal of Aerospace Power. All right reserved.
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页码：2140 / 2148
页数：8
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