轴流泵马鞍区内流特性分析
发布时间：2018-09-09 09:39
【摘要】：为了分析轴流泵在马鞍区工况的内部流动特性,对比转速为822轴流泵的内流场进行数值模拟和分析,并对外特性进行试验测试。研究结果表明:扬程模拟值与实验值误差均在1%以内,效率模拟值与实验值误差均在2%以内;0.6Q_(BEP)工况叶片压力面静压力分布不均匀,较最优工况从叶片进口到出口静压力的压力梯度明显增大,在吸力面出现了较大面积的低压区,0.55Q_(BEP)工况叶片压力面靠近轮缘的高压区较0.6Q_(BEP)工况时明显增大,吸力面从叶片进口到出口静压力逐渐增大;最优工况下叶片压力面和吸力面涡量螺旋度Hn分布较均匀,马鞍区内叶片吸力面和压力面存在明显的旋涡集中区;马鞍区内叶轮进口靠近前缘侧出现回流,叶轮出口靠近轮毂处产生明显旋涡。
[Abstract]:In order to analyze the internal flow characteristics of axial flow pump in saddle region, the internal flow field of 822 axial flow pump was numerically simulated and analyzed, and the external characteristics were tested. The results show that the error between the simulated and experimental values of the lift is less than 1%, and the error between the efficiency simulation and the experimental value is within 2%. The static pressure distribution on the blade pressure surface under 0.6 Q _ (BEP) operating conditions is not uniform. The pressure gradient from the inlet to the outlet of the blade increases obviously in the optimum working condition, and the high pressure area near the flange of the blade pressure surface near the flange increases obviously in the suction surface with a large area of low pressure area (0.55Q _ (BEP) compared with the 0.6 Q _ (BEP) condition. The vorticity helicity of the blade pressure surface and suction surface is uniform under the optimal working conditions, and there is an obvious vortex concentration area between the suction surface and the pressure surface in the saddle region. The suction surface increases gradually from the blade inlet to the outlet, and the vorticity helicity of the blade pressure surface and suction surface is uniform under the optimal working conditions. The inlet of impeller in saddle region is close to the leading edge, and the impeller outlet is close to the hub.
【作者单位】： 江苏大学国家水泵及系统工程技术研究中心;江苏大学能源与动力工程学院;黄河水利委员会黄河水利科学研究院;
【基金】：国家自然科学基金资助项目(51239005) 水利部技术示范项目(SF-201604) 江苏省产学研联合创新资金——前瞻性联合研究项目(BY2015064-10) 江苏省“六大人才高峰”高层次人才项目(GBZB-017) 江苏高校优势学科建设工程资助项目 流体及动力机械教育部重点实验室(西华大学)开放课题(szjj2016-068)
【分类号】：TV136.2
，
本文编号：2232010
[Abstract]:In order to analyze the internal flow characteristics of axial flow pump in saddle region, the internal flow field of 822 axial flow pump was numerically simulated and analyzed, and the external characteristics were tested. The results show that the error between the simulated and experimental values of the lift is less than 1%, and the error between the efficiency simulation and the experimental value is within 2%. The static pressure distribution on the blade pressure surface under 0.6 Q _ (BEP) operating conditions is not uniform. The pressure gradient from the inlet to the outlet of the blade increases obviously in the optimum working condition, and the high pressure area near the flange of the blade pressure surface near the flange increases obviously in the suction surface with a large area of low pressure area (0.55Q _ (BEP) compared with the 0.6 Q _ (BEP) condition. The vorticity helicity of the blade pressure surface and suction surface is uniform under the optimal working conditions, and there is an obvious vortex concentration area between the suction surface and the pressure surface in the saddle region. The suction surface increases gradually from the blade inlet to the outlet, and the vorticity helicity of the blade pressure surface and suction surface is uniform under the optimal working conditions. The inlet of impeller in saddle region is close to the leading edge, and the impeller outlet is close to the hub.
【作者单位】： 江苏大学国家水泵及系统工程技术研究中心;江苏大学能源与动力工程学院;黄河水利委员会黄河水利科学研究院;
【基金】：国家自然科学基金资助项目(51239005) 水利部技术示范项目(SF-201604) 江苏省产学研联合创新资金——前瞻性联合研究项目(BY2015064-10) 江苏省“六大人才高峰”高层次人才项目(GBZB-017) 江苏高校优势学科建设工程资助项目 流体及动力机械教育部重点实验室(西华大学)开放课题(szjj2016-068)
【分类号】：TV136.2
，
本文编号：2232010
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