流体机械
流體機械
류체궤계
FLUID MACHINERY
2015年
7期
42-46
,共5页
船用吹除阀%数值研究%流体分析%优化设计
船用吹除閥%數值研究%流體分析%優化設計
선용취제벌%수치연구%류체분석%우화설계
pneumatic blowing valve for ship%numerical investigation%fluid analysis%design optimization
基于 CFD 技术，以静压进口和静压出口作为边界条件，采用标准 k －ε湍流模型对8种不同阀芯结构和进口流道形状的船用吹除阀内部流动特性进行数值研究。研究结果表明，阀芯结构对质量流量的影响较小，影响偏差值为0．18 kg／s；进口流道形状对质量流量影响较大，影响偏差值为1．41kg／s。阀芯结构对内部流动影响较小，进口形状对内部流动具有较大影响，锥管进口的速度变化梯度高于直管进口，锥管进口涡的强度大于直管进口。船用吹除阀设计时，建议采用 Rt ＝2mm 的弧形阀芯和直管进口形式．
基于 CFD 技術，以靜壓進口和靜壓齣口作為邊界條件，採用標準 k －ε湍流模型對8種不同閥芯結構和進口流道形狀的船用吹除閥內部流動特性進行數值研究。研究結果錶明，閥芯結構對質量流量的影響較小，影響偏差值為0．18 kg／s；進口流道形狀對質量流量影響較大，影響偏差值為1．41kg／s。閥芯結構對內部流動影響較小，進口形狀對內部流動具有較大影響，錐管進口的速度變化梯度高于直管進口，錐管進口渦的彊度大于直管進口。船用吹除閥設計時，建議採用 Rt ＝2mm 的弧形閥芯和直管進口形式．
기우 CFD 기술，이정압진구화정압출구작위변계조건，채용표준 k －ε단류모형대8충불동벌심결구화진구류도형상적선용취제벌내부류동특성진행수치연구。연구결과표명，벌심결구대질량류량적영향교소，영향편차치위0．18 kg／s；진구류도형상대질량류량영향교대，영향편차치위1．41kg／s。벌심결구대내부류동영향교소，진구형상대내부류동구유교대영향，추관진구적속도변화제도고우직관진구，추관진구와적강도대우직관진구。선용취제벌설계시，건의채용 Rt ＝2mm 적호형벌심화직관진구형식．
The internal flow characteristics of 8 different pneumatic blowing valves with different spool structures and inlet types are investigated by CFD.The pressure inlet and pressure outlet is set as boundaries conditions,and standard k -ε turbulence model is defined as calculation model.Results show that the mass flow of pneumatic blowing valve is less impacted by spool struc-tures,and the influence deviation is 0.18kg/s.While,the mass flow of pneumatic blowing valve is heavier impacted by inlet types,and the influence deviation is 1.41kg/s.The flow structure of pneumatic blowing valve is more affected by inlet types than spool structure,which reflected by the velocity gradient of tapered inlet is higher than straight inlet and vortex intensity of tapered inlet is greater than straight inlet.Therefore,the arc -shaped spool with Rt =2mm and straight inlet are proposed for optimization design.
