将开缝技术应用于轴流泵的叶轮上, 并选择合适的开缝翼型作为叶轮开缝的依据, 设计了一种新型轴流泵叶轮. 基于商用CFD 软件ANSYS CFX, 对常规轴流泵和开缝叶片轴流泵进行了数值模拟计算, 并分析了常规轴流泵和开缝叶片轴流泵在不同工况下的水力性能及其流场特点. 数值计算结果表明, 开缝技术提高了轴流泵在小流量工况下的水力性能, 并降低了进口压力脉动. 进行了两种轴流泵的水力性能对比实验, 结果表明, 开缝叶片轴流泵在小流量工况下的性能优于常规轴流泵, 证明了开缝技术能有效地提高轴流泵在小流量工况下的水力性能.
By applying slot techniques to the impeller of axial-flow pump and choosing an appropriate slotted airfoil as a basis of the slotted impeller, a new type of blade is designed. Based on the commercial CFD software ANSYS CFX, numerical simulation of conventional axial-flow pump and axial-flow pump with slotted blades is carried out to analyze the hydraulic performance and flow characteristics under different conditions. The simulation results show that the slot technique can improve performance of axial-flow pumps under the condition of small flow and decrease pressure pulsation at the impeller’s inlet. Experiments are performed on two types of axial flow pumps. The obtained hydrodynamic characteristics indicate that an axial-flow pump with slotted blades outperforms conventional axial-flow pumps under small flow conditions, indicating that the slot technique can indeed improve axial-flow pump’s performance.
[1] 解亚军, 叶正寅, 高永卫. 翼型风洞实验侧壁附而层控制技术的研究[J]. 弹箭与制导学报, 2008, 28(6): 205-207.
[2] Assato M. Analysis of a methodology for 2-D high lift testing using a boundary-layer control system by air blowing [C]//45th AIAA Aerospace Sciences Meeting and Exhibit. 2007: 7051-7062.
[3] Girardi R M, Assato M. Effect of the blown plane jet thickness on the minimization of threedimensional flow over a three-element airfoil model [C]//44th AIAA Aerospace Sciences Meeting and Exhibit. 2006: 1391-1402.
[4] 张理想, 解亚军, 邓小龙. 多段翼型风动侧壁边界层吹除控制实验研究[J]. 科学技术与工程, 2011, 23(11): 5594-5598.
[5] 王建冈, 刘沛清, 屈秋林. 多段翼型地效风洞实验的地板边界层控制研究[J]. 民用飞机设计与研究, 2009(S1): 24-29.
[6] 张进, 张彬乾, 阎文成. 微型涡流发生器控制超临界翼型边界层分离实验研究[J]. 实验流体力学, 2005, 19(3): 58-61.
[7] 黄东涛, 边晓东, 唐旭东, 等. 长短叶片开缝技术在离心风机设计中的应用[J]. 清华大学学报: 自然科学版, 1999, 39(4): 6-9.
[8] 杨科, 王会社, 徐建中, 等. 开缝式风力机静态失速特性的研究[J]. 工程热物理学报, 2008, 29(1): 32-35.
[9] Johansen S T, Yang W J, Shyy W. Filterbased unsteady RANS computations [J]. International Journal of Heat and Fluid Flow, 2004(25): 10-21.
[10] Zhang R, Chen H X. Numerical simulation and flow diagnosis of axial-flow pump at part-load condition [J]. International Journal of Turbo and Jetengines, 2012, 29(1): 1-7.
[11] 王福军, 张玲, 张志民. 轴流泵不稳定流场的压力脉动特性研究[J]. 水利学报, 2007, 38(8): 1003-1009.
