流体机械
流體機械
류체궤계
FLUID MACHINERY
2014年
6期
41-46,88
,共7页
湍流模型%小型潜水泵%性能预测%相对误差%计算流体力学
湍流模型%小型潛水泵%性能預測%相對誤差%計算流體力學
단류모형%소형잠수빙%성능예측%상대오차%계산류체역학
turbulencemode%smallsubmergedpump%performancepredictions%relativeerror%CFD
为了探讨不同湍流模型在小型潜水泵性能预测中的适用性，本文以QDX6-18-0．75型潜水电泵为研究对象，分别选取Standard k-ε、Reliable k-ε、RNG k-ε、RSM4种不同湍流模型对小型潜水电泵进行全流场模拟，得到6种工况下泵扬程和效率的预测值，并与试验台测得的数据进行对比分析。结果表明：设计工况下，4种湍流模型的扬程相对误差均小于1．5％，效率相对误差均小于2．5％，满足工程应用需求；小流量工况下，Reliable k-ε模型相对误差最小，扬程最大偏移0．75％，效率最大偏移4．36％；大流量工况下，Standard k-ε模型扬程预测精度高于其它3种湍流模型， RSM模型的效率预测精度最高。综上Reliable k-ε模型的适用性最强，Standard k-ε模型次之。该结论为小型潜水电泵性能预测的可靠性提供依据，并已在产品改型中得以应用。
為瞭探討不同湍流模型在小型潛水泵性能預測中的適用性，本文以QDX6-18-0．75型潛水電泵為研究對象，分彆選取Standard k-ε、Reliable k-ε、RNG k-ε、RSM4種不同湍流模型對小型潛水電泵進行全流場模擬，得到6種工況下泵颺程和效率的預測值，併與試驗檯測得的數據進行對比分析。結果錶明：設計工況下，4種湍流模型的颺程相對誤差均小于1．5％，效率相對誤差均小于2．5％，滿足工程應用需求；小流量工況下，Reliable k-ε模型相對誤差最小，颺程最大偏移0．75％，效率最大偏移4．36％；大流量工況下，Standard k-ε模型颺程預測精度高于其它3種湍流模型， RSM模型的效率預測精度最高。綜上Reliable k-ε模型的適用性最彊，Standard k-ε模型次之。該結論為小型潛水電泵性能預測的可靠性提供依據，併已在產品改型中得以應用。
위료탐토불동단류모형재소형잠수빙성능예측중적괄용성，본문이QDX6-18-0．75형잠수전빙위연구대상，분별선취Standard k-ε、Reliable k-ε、RNG k-ε、RSM4충불동단류모형대소형잠수전빙진행전류장모의，득도6충공황하빙양정화효솔적예측치，병여시험태측득적수거진행대비분석。결과표명：설계공황하，4충단류모형적양정상대오차균소우1．5％，효솔상대오차균소우2．5％，만족공정응용수구；소류량공황하，Reliable k-ε모형상대오차최소，양정최대편이0．75％，효솔최대편이4．36％；대류량공황하，Standard k-ε모형양정예측정도고우기타3충단류모형， RSM모형적효솔예측정도최고。종상Reliable k-ε모형적괄용성최강，Standard k-ε모형차지。해결론위소형잠수전빙성능예측적가고성제공의거，병이재산품개형중득이응용。
Inordertoevaluateapplicabilityofturbulencemodelforperformancesofasmallsubmergedpump,thestandardk-ε,reliable k-ε,RNG k-εand RSMwere used in numerical simulation and performance prediction of the QDX 6-18-0.75 pump under different operation conditions.The simulated head and pump efficiency were compared with experimental data.The result shows that:all four turbulence models give accurate predictions in the design condition,the maximum relative error less than 2.5%;In the small flow condition,the reliable k-εmodel has the best agreement with experimental data,the relative er-ror of the head is 0.75%,the maximum efficiency error is 4.36%.Under other off-design condition,standard k-εpossess highest precision of the head,RSM does the best in the efficiency prediction.Comprehensive evaluation of the data,among all four turbulence models reliable k-εmodel is the best one to predict the performance of small submerged pumps,standard k-εis the second one.This conclusion has been testified in the revised product.
