發(fā)布時(shí)間：2018-06-30 00:05

  本文選題：核主泵 + 葉輪��； 參考：《排灌機(jī)械工程學(xué)報(bào)》2017年06期

【摘要】：基于Reynolds時(shí)均化N-S方程和RNG k-ε湍流模型,采用SIMPLE算法和多重坐標(biāo)系法,對(duì)3種不同導(dǎo)葉軸向安放位置核主泵縮比模型的內(nèi)部流動(dòng)進(jìn)行了全三維定常數(shù)值計(jì)算.通過對(duì)比分析外特性、壓力場和速度場,研究了導(dǎo)葉軸向安放位置對(duì)模型泵葉輪、導(dǎo)葉和泵殼內(nèi)部能量轉(zhuǎn)換特性的影響.結(jié)果表明,減小導(dǎo)葉與泵出水管軸線在葉輪旋轉(zhuǎn)軸線方向的距離,小流量工況下,泵的效率增加,其中葉輪效率增加,泵殼內(nèi)的流動(dòng)狀態(tài)有所改善,回流現(xiàn)象有所抑制,從而減小了泵殼損失,但同時(shí)導(dǎo)葉損失也有所增加;設(shè)計(jì)及大流量工況下,泵的效率減小,其中葉輪效率有所降低,同時(shí)導(dǎo)葉和泵殼損失也相應(yīng)增加.由于核主泵葉輪、導(dǎo)葉和泵殼的參數(shù)相互關(guān)聯(lián)和影響,改變導(dǎo)葉軸向安放位置會(huì)影響各單元間耦合匹配特性,進(jìn)而影響葉輪、導(dǎo)葉和泵殼內(nèi)流動(dòng)狀態(tài)及能量轉(zhuǎn)換效率.
[Abstract]:Based on Reynolds time homogenized N-S equation and RNG k- 蔚 turbulence model, three dimensional steady numerical calculations of the internal flow of three different axial position nuclear pump models are carried out by using simple algorithm and multiple coordinate system method. By comparing and analyzing the external characteristics, pressure field and velocity field, the influence of axial position of guide vane on the energy transfer characteristics of the impeller, guide vane and shell of the model pump was studied. The results show that when the distance between the guide vane and the axial line of the pump outlet pipe is reduced in the direction of the rotating axis of the impeller, the efficiency of the pump increases under the condition of small flow rate, in which the efficiency of the impeller increases, the flow state in the pump shell is improved, and the phenomenon of reflux is restrained. Therefore, the loss of the pump shell is reduced, but the loss of the guide vane is also increased, and the efficiency of the pump decreases under the design and large flow conditions, in which the efficiency of the impeller decreases, and the loss of the guide vane and the pump shell increases accordingly. Because the parameters of the impeller, the guide vane and the shell of the nuclear main pump are interrelated and affected, changing the axial position of the guide vane will affect the coupling and matching characteristics among the elements, and then affect the flow state and energy conversion efficiency in the impeller, the guide vane and the pump shell.
【作者單位】： 蘭州理工大學(xué)能源與動(dòng)力工程學(xué)院;甘肅省流體機(jī)械及系統(tǒng)重點(diǎn)實(shí)驗(yàn)室;
【基金】：國家自然科學(xué)基金資助項(xiàng)目(51469013)
【分類號(hào)】：TH38;TM623
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本文編號(hào)：2083956