不同叶型的半开式叶轮离心泵的数值模拟与试验研究
发布时间：2018-08-22 08:36
【摘要】：开式叶轮离心泵具有几乎连续不变的扬程流量曲线，即扬程在整个流量范围内变化很小，广泛应用于石油、化工及航空航天等领域。虽然开式叶轮离心泵在一些场合发挥着重要作用，但是效率有待提高。本文采用数值计算和试验的研究方法，对两种叶型的半开叶轮对离心泵性能影响进行了研究，旨在了解叶型对离心泵内部流动情况以及外特性性能的影响规律，为半开叶轮离心泵的优化和改进提供依据和参考。具体研究内容包括以下几个方面： （1）利用三维造型软件对两种叶型的半开式叶轮离心泵的过流部件进行了三维实体建模，主要有诱导轮、直叶片半开式叶轮、弯叶片半开式叶轮、蜗壳。利用NUMECA软件，采用分块技术、蝶形网格、完全匹配等技术对过流部件生成六面体结构化网格，并给出边界条件设置。 （2）采用雷诺时均Navier-Stokes方程和Spalart-Allmaras模型湍流模型，在额定转速2900r/min和低转速1450r/min两种转速工况下，分别对直叶片半开式叶轮和弯叶片半开式叶轮离心泵内部流动进行了整机定常数值模拟，分析了叶型对离心泵过流部件的流动特性及外特性性能的影响规律。 （3）对两种叶型的半开式叶轮离心泵在2900r/min和1450r/min转速进行了试验研究，得到了直叶片半开式叶轮、弯叶片半开式叶轮在不同转速工况下的离心泵性能曲线，并和数值模拟结果进行了对比分析。
[Abstract]:The open impeller centrifugal pump has almost constant lift flow curve, that is, the lift has little change in the whole flow range, which is widely used in petroleum, chemical industry, aerospace and other fields. Although the open impeller centrifugal pump plays an important role in some occasions, the efficiency needs to be improved. In this paper, the effect of two kinds of semi-open impellers on the performance of centrifugal pump is studied by numerical calculation and experimental method. The purpose of this paper is to understand the influence of blade shape on the internal flow and external performance of centrifugal pump. It provides basis and reference for optimization and improvement of semi-open impeller centrifugal pump. The specific research contents include the following aspects: (1) the three dimensional solid modeling of the flow components of two kinds of semi-open impeller centrifugal pump with two kinds of blade shapes are carried out by using three-dimensional modeling software, which mainly includes induction wheel, straight blade semi-open impeller, and direct blade semi-open impeller. Curved blade half-open impeller, volute. Using NUMECA software, block technique, butterfly mesh and perfect matching technique are used to generate hexahedron structured meshes for flow components. (2) Reynolds time averaged Navier-Stokes equation and Spalart-Allmaras model turbulence model are used. Under the condition of rated speed 2900r/min and low speed 1450r/min, the flow inside the centrifugal pump of semi-open impeller with straight blade and semi-open impeller with curved blade is simulated numerically. The influence of blade profile on the flow characteristics and external performance of the flow passing parts of centrifugal pump is analyzed. (3) two kinds of semi-open impeller centrifugal pumps with two kinds of blades are tested at 2900r/min and 1450r/min speed, and the semi-open impellers with straight vane are obtained. The performance curve of centrifugal pump with curved blade semi-open impeller under different rotating speed conditions is analyzed and compared with the numerical simulation results.
【学位授予单位】：浙江理工大学
【学位级别】：硕士
【学位授予年份】：2012
【分类号】：TH311
[Abstract]:The open impeller centrifugal pump has almost constant lift flow curve, that is, the lift has little change in the whole flow range, which is widely used in petroleum, chemical industry, aerospace and other fields. Although the open impeller centrifugal pump plays an important role in some occasions, the efficiency needs to be improved. In this paper, the effect of two kinds of semi-open impellers on the performance of centrifugal pump is studied by numerical calculation and experimental method. The purpose of this paper is to understand the influence of blade shape on the internal flow and external performance of centrifugal pump. It provides basis and reference for optimization and improvement of semi-open impeller centrifugal pump. The specific research contents include the following aspects: (1) the three dimensional solid modeling of the flow components of two kinds of semi-open impeller centrifugal pump with two kinds of blade shapes are carried out by using three-dimensional modeling software, which mainly includes induction wheel, straight blade semi-open impeller, and direct blade semi-open impeller. Curved blade half-open impeller, volute. Using NUMECA software, block technique, butterfly mesh and perfect matching technique are used to generate hexahedron structured meshes for flow components. (2) Reynolds time averaged Navier-Stokes equation and Spalart-Allmaras model turbulence model are used. Under the condition of rated speed 2900r/min and low speed 1450r/min, the flow inside the centrifugal pump of semi-open impeller with straight blade and semi-open impeller with curved blade is simulated numerically. The influence of blade profile on the flow characteristics and external performance of the flow passing parts of centrifugal pump is analyzed. (3) two kinds of semi-open impeller centrifugal pumps with two kinds of blades are tested at 2900r/min and 1450r/min speed, and the semi-open impellers with straight vane are obtained. The performance curve of centrifugal pump with curved blade semi-open impeller under different rotating speed conditions is analyzed and compared with the numerical simulation results.
【学位授予单位】：浙江理工大学
【学位级别】：硕士
【学位授予年份】：2012
【分类号】：TH311
【参考文献】
相关期刊论文 前10条
1 王乐勤,朱祖超;超低比转速高速诱导轮离心泵的不稳定控制与试验研究[J];工程热物理学报;1998年03期
2 宁方飞,徐力平;Spalart—Allmaras湍流模型在内流流场数值模拟中的应用[J];工程热物理学报;2001年03期
3 吴大转;许斌杰;李志峰;王乐勤;;离心泵瞬态操作条件下内部流动的数值模拟[J];工程热物理学报;2009年05期
4 夏刚,程文科,秦子增;Spalart-Allmaras湍流模型在高超声速气动加热计算中的应用[J];国防科技大学学报;2002年06期
5 黎义斌;张德胜;赵伟国;敏政;;叶片数及分流叶片位置对离心泵性能的影响[J];兰州理工大学学报;2008年02期
6 查森 ,杨敏官;低比转数离心泵提高效率的研究[J];江苏工学院学报;1986年04期
7 万毅,严敬,杨小林;离心泵叶轮内水流相对速度的实验研究[J];机械设计;2005年06期
8 郭鹏程,罗兴，
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