叶片进口安放角对泵作透平外特性影响的数值模拟与验证
发布时间：2018-10-22 20:40
【摘要】：为充分探究离心泵作透平专用叶轮叶片进口安放角的确定方法,该文建立了液力透平专用叶轮叶片进口安放角与设计流量的关系表达式;基于ANSYS Blade Gen与NX软件,分别设计了4个不同叶片进口安放角的透平专用叶轮;在试验验证基础上,通过全流场数值计算,分析了叶片进口安放角对透平外性能的影响。结果表明:叶片进口安放角从60°增大到72°、90°和105°时,透平高效点对应的流量分别为85、90、100和110 m3/h,4台透平数值计算最高效率点流量与理论计算设计流量基本吻合,表明采用该文推导的设计流量与进口安放角的关系式合理。外特性性能曲线显示随叶片进口安放角增大,透平高效点向大流量偏移,最高效率值有所下降,且下降的速率增大。综合考虑透平最高效率及高效区范围,对于比转速为193蜗壳式单级单吸离心泵反转作透平,叶片进口安放角宜设计在60°与90°之间。该研究可为液力透平专用叶轮设计提供参考。
[Abstract]:In order to fully explore the method of determining the inlet angle of impeller blade for centrifugal pump, this paper establishes the expression of the relation between the inlet angle of impeller blade and the design flow rate, based on the software of ANSYS Blade Gen and NX. Four special turbine impellers with different blade inlet placement angles were designed, and the effect of blade inlet placement angle on turbine performance was analyzed by numerical calculation of the whole flow field on the basis of experimental verification. The results show that when the inlet angle of blade is increased from 60 掳to 72 掳, 90 掳and 105 掳, the flow rate corresponding to the high efficiency point of turbine is 85,90100 and 110 m3 / h respectively. The maximum efficiency point flow rate is in good agreement with the theoretical design flow rate. It shows that the relationship between the design flow rate and the inlet angle is reasonable. The external performance curve shows that with the increase of the blade inlet angle, the turbomachine high efficiency point shifts to the large flow rate, the maximum efficiency value decreases, and the decreasing rate increases. Considering the maximum efficiency of turbine and the range of high efficiency region, the turbine is designed between 60 掳and 90 掳when the specific speed is 193 volute single-stage suction centrifugal pump inversion, and the blade inlet angle should be designed between 60 掳and 90 掳. The research can provide reference for the design of special impeller for hydraulic turbine.
【作者单位】： 江苏大学流体机械工程技术研究中心;西华大学能源与动力工程学院流体及动力机械教育部重点实验室;成都瀚能精密机械有限责任公司;
【基金】：国家自然科学基金资助项目(11602097、51379179) 江苏省普通高校研究生科研创新计划资助项目(CXZZ13-0678) 四川省教育厅重大培育项目
【分类号】：TH311
本文编号：2288252
[Abstract]:In order to fully explore the method of determining the inlet angle of impeller blade for centrifugal pump, this paper establishes the expression of the relation between the inlet angle of impeller blade and the design flow rate, based on the software of ANSYS Blade Gen and NX. Four special turbine impellers with different blade inlet placement angles were designed, and the effect of blade inlet placement angle on turbine performance was analyzed by numerical calculation of the whole flow field on the basis of experimental verification. The results show that when the inlet angle of blade is increased from 60 掳to 72 掳, 90 掳and 105 掳, the flow rate corresponding to the high efficiency point of turbine is 85,90100 and 110 m3 / h respectively. The maximum efficiency point flow rate is in good agreement with the theoretical design flow rate. It shows that the relationship between the design flow rate and the inlet angle is reasonable. The external performance curve shows that with the increase of the blade inlet angle, the turbomachine high efficiency point shifts to the large flow rate, the maximum efficiency value decreases, and the decreasing rate increases. Considering the maximum efficiency of turbine and the range of high efficiency region, the turbine is designed between 60 掳and 90 掳when the specific speed is 193 volute single-stage suction centrifugal pump inversion, and the blade inlet angle should be designed between 60 掳and 90 掳. The research can provide reference for the design of special impeller for hydraulic turbine.
【作者单位】： 江苏大学流体机械工程技术研究中心;西华大学能源与动力工程学院流体及动力机械教育部重点实验室;成都瀚能精密机械有限责任公司;
【基金】：国家自然科学基金资助项目(11602097、51379179) 江苏省普通高校研究生科研创新计划资助项目(CXZZ13-0678) 四川省教育厅重大培育项目
【分类号】：TH311
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