空化模型热力学修正的核主泵空化研究

发布时间：2018-11-15 10:17

【摘要】：为研究核主泵的空化特性,基于ANSYS CFX软件,对现有Zwart-Gerber-Belamri空化模型进行热力学效应修正,在不同流量下采用修正前后的空化模型分别对模型核主泵进行数值计算,并将模拟值与试验值进行对比分析,验证了在核主泵空化发生时热力学效应修正的正确性。结果表明,未发生空化时,模型修正不具有明显影响,随着核主泵空化的加深,影响加大;模型泵空化性能的数值模拟预测与试验值趋势吻合,误差值在5.3%~9.6%之内,验证了空化数值模拟对核主泵工程应用中性能预测的可靠性;空化余量减小时,叶片低压区域从进口向出口扩张,随低压区域的扩张,汽泡填充整个流道,叶片载荷力降低,扬程下降。
[Abstract]:In order to study the cavitation characteristics of nuclear main pump, based on ANSYS CFX software, the thermodynamic effect of existing Zwart-Gerber-Belamri cavitation model is modified, and the modified cavitation model is used to calculate the model nuclear main pump numerically under different flow rates. By comparing the simulated value with the experimental value, the correctness of the thermodynamic effect correction is verified when the cavitation of the nuclear main pump occurs. The results show that the model modification has no obvious effect when there is no cavitation, and the effect increases with the cavitation of the nuclear main pump. The numerical simulation prediction of the cavitation performance of the model pump is consistent with the trend of the experimental value, and the error value is less than 5.3%, which verifies the reliability of the cavitation numerical simulation in the application of nuclear main pump engineering. With the decrease of cavitation allowance, the low pressure region of the blade expands from the inlet to the outlet. With the expansion of the low pressure region, the bubble fills the whole passage, and the load force of the blade decreases and the lift decreases.
【作者单位】：江苏大学流体机械工程技术研究中心;
【基金】：国家自然科学基金(51379091) 江苏省自然科学基金(BK20130516) 国家博士后基金(2014M551511) 江苏高校优势学科建设工程资助项目(PDPA)
【分类号】：TL353.12;TM623

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