| 弯掠叶片对轴流泵驼峰及空化性能的影响 |
| |
| 引用本文： | 刘竹青,肖若富,吕腾飞,李述林.弯掠叶片对轴流泵驼峰及空化性能的影响[J].排灌机械,2012,30(3):270-273,299. |
| |
| 作者姓名： | 刘竹青 肖若富 吕腾飞 李述林 |
| |
| 作者单位： | 1. 中国农业大学水利与土木工程学院,北京,100083
2. 航空机电系统综合航空科技重点实验室,江苏南京,211106 |
| |
| 基金项目： | 国家自然科学基金资助项目 |
| |
| 摘 要： | 以高速轴流泵为研究对象,通过改变叶片在轴面的积迭线得到弯掠叶片.分别对弯掠叶片高速轴流泵和原型叶片高速轴流泵进行全三维流道整机数值模拟,得到其外特性曲线,并针对设计工况和出现＂驼峰区＂时对应的失速工况施加空化模型进行数值模拟,研究叶片的弯掠对其空化性能的影响及叶片表面压力分布规律.模拟结果对比表明：合理的弯掠叶片可有效改善原型叶片轴流泵出现的＂驼峰区＂,控制叶顶二次流的发生及发展,回收端壁二次流的能量损失,从而改善轴流泵在驼峰区的运行性能;同时,弯掠叶片提高了轴流泵在失速工况的空化性能,改变其叶片进口处梯度分布,避免了流体在壁面较易产生的分离流动;但在设计工况时其空化性能劣于原型叶片轴流泵,叶片表面压力分布也显示,原型叶片的表面压差大于弯掠叶片的表面压差,因此在设计工况时原型叶片的做功能力优于弯掠叶片.
|
| 关 键 词： | 轴流泵 弯掠叶片 空化性能 计算流体动力学 |
Effect of swept blade on hump and cavitation characteristics of axial flow pump |
| |
| Liu Zhuqing
,
Xiao Ruofu
,
Lü Tengfei
,
Li Shulin.Effect of swept blade on hump and cavitation characteristics of axial flow pump[J].Drainage and Irrigation Machinery,2012,30(3):270-273,299. |
| |
| Authors: | Liu Zhuqing Xiao Ruofu Lü Tengfei Li Shulin |
| |
| Institution: | 1. College of Water Resources and Civil Engineering, China Agricultural University, Beijing 100083 ,China; 2. Aviation Key Laborato- ry of Science and Technology on Aero Electromechanieal System Integration,Nanjing, Jiangsu 211106, China) |
| |
| Abstract: | A swept blade was designed based on changing the stacking line in the meridional plane of an axial flow pump impeller. The high speed fuel axial flow pumps, with swept blades and datum blades respectively, were simulated in the overall operation by the code of computational fluid dynamics （CFD） and the overall efficiency and pump head performance curves were obtained. Using the full cavitation model, the cavitation performances of pumps were predicted under the designed point condition and near stall point condition to investigate the effects of swept blade on the cavitation performance and distribution of pressure on blade surfaces of an axial flow pump. According to the numerical results, the swept blade changes the hump characteristic of the axial flow pump, controls the onset and growth of the secondary flows, and recovers the low-energy fluid on the endwalls. Therefore, the stability of operation in the hump zones is improved. Near stall point condition, the swept blade improves the cavitation characteristic of the pump, changes the pressure distribution on the impeller inlet, and avoids the separated flow on the endwalls. While under the design point condition, the swept blade reduces the cavitation characteristic, the blade surface pressure distribution also presents the pressure difference of the datum blade is higher than the swept blade, resulting in the ability of doing work of the former is better than the latter. |
| |
| Keywords: | axial flow pump swept blade cavitation characteristic computational fluid dynamics |
| 本文献已被 维普 万方数据 等数据库收录！ |
|
