华中科技大学学报：自然科学版2012，Vol.40Issue(8)：12-16,5.
复杂泵体压力脉动特性的数值模拟
Numerical simulation of pressure fluctuations in complex pumps
摘要
Abstract
Taken a decompression tower bottom pump as an example,the unsteady flow was simulated numerically by using CFD（computational fluid dynamics） to reveal the instability of hydraulic performance in complex pumps.According to the obtained pressure fluctuations inside the volute,time domain and frequency domain were analyzed.The results show that the blade passing frequency under different conditions dominates the pressure fluctuations and it become more obvious in the secondary volute.The pressure fluctuations decrease in the direction of volute,and the maximum occurs near the tongues.The pressure fluctuations in the volute are relatively low at the design flow rate condition.The amplitude of pressure fluctuations near the secondary volute under the low flow rate condition is 2.63 times larger than that of design condition.关键词
复杂泵体/减压塔底泵/数值模拟/速度场/压力脉动/时域与频域分析Key words
complex pump/decompression tower bottom pump/numerical simulation/velocity distribution/pressure fluctuations/time-frequency domain analysis分类
机械工程引用本文复制引用
孔繁余,薛玲,王婷,宿向辉..复杂泵体压力脉动特性的数值模拟[J].华中科技大学学报：自然科学版,2012,40(8):12-16,5.基金项目
国家科技支撑计划资助项目 （）
国家自然科学基金资助项目 （）
