| 水膜形成对轴流风扇气动影响的数值研究 |
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| 引用本文： | 侯圣文,张海,吴锋,田小江,周杰.水膜形成对轴流风扇气动影响的数值研究[J].航空动力学报,2019,34(10):2140-2148. |
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| 作者姓名： | 侯圣文 张海 吴锋 田小江 周杰 |
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| 作者单位： | 哈尔滨工程大学动力与能源工程学院,哈尔滨,150001;中国航空发动机集团有限公司四川燃气涡轮研究院,四川绵阳621000;中国航空发动机集团有限公司四川燃气涡轮研究院高空模拟技术重点实验室,四川绵阳621000;中国航空发动机集团有限公司四川燃气涡轮研究院,四川绵阳,621000 |
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| 基金项目： | 中央高校基本科研业务费专项基金(3072019CFJ0309) |
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| 摘 要： | 为了研究水膜对风扇气动特性的影响,综合水滴碰撞壁面的参数,应用水膜方程求得叶片表面水膜方均根厚度。在数值计算中引入砂砾粗糙度模型来模拟水膜引起的叶片表面粗糙度变化。针对不同吞雨量和水滴直径条件开展数值计算。计算结果表明:水膜主要分布在叶片压力面中的前缘和叶根区域,其厚度和沉积面积随着吞雨量的增加而增大,并且水膜的存在会导致风扇压比和温比的降低。例如,当水滴直径为1000μm、吞雨量为5%时,水滴沉积面积为0.0758m2,占叶片压力面总表面积的33.91%。
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| 关 键 词： | 吞雨 轴流风扇 水膜 砂砾粗糙度 气动性能 |
| 收稿时间： | 2019/4/16 0:00:00 |
Numerical study on water film formation on aerodynamic effect of axial flow fan |
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| HOU Shengwen and WU Feng.Numerical study on water film formation on aerodynamic effect of axial flow fan[J].Journal of Aerospace Power,2019,34(10):2140-2148. |
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| Authors: | HOU Shengwen and WU Feng |
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| Affiliation: | 1.College of Power and Energy Engineering,Harbin Engineering University,Harbin 150001,China2.Sichuan Gas Turbine Establishment,Aero Engine Corporation of China,Mianyang Sichuan 621000,China3.Science and Technology on Altitude Simulation Laboratory,Sichuan Gas Turbine Establishment,Aero Engine Corporation of China,Mianyang Sichuan 621000,China |
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| Abstract: | 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%, thewater droplet depositionalarea is 0.0758m2, accounting for 33.91% of the pressure surface area of the blade. |
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| Keywords: | rain ingestion axial flow fan water film sand grain roughness aerodynamic performance |
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