本文關(guān)鍵詞： 導(dǎo)流錐 泵裝置 進(jìn)水流道 雙向軸流泵 水力性能　出處：《水電能源科學(xué)》2017年07期 　論文類型：期刊論文

【摘要】：為研究導(dǎo)流錐對低揚(yáng)程雙向軸流泵裝置水力性能的影響,以蘇南某泵站為例,設(shè)定有、無導(dǎo)流錐兩種方案,基于RNG湍流模型,采用CFD方法對雙向軸流泵裝置進(jìn)行全流道三維湍流數(shù)值計(jì)算。結(jié)果表明,無導(dǎo)流錐時(shí),進(jìn)水流道水流流態(tài)較有導(dǎo)流錐時(shí)紊亂,且水流從進(jìn)水流道喇叭口下方周圍環(huán)向進(jìn)水,喇叭口中心處出現(xiàn)奇點(diǎn);有導(dǎo)流錐時(shí),導(dǎo)流錐占據(jù)了喇叭口下方奇點(diǎn)位置,消除了奇點(diǎn)。有導(dǎo)流錐時(shí),出口流場均勻性較好,進(jìn)水流道的水力損失隨著流量的增加而逐漸增加;無導(dǎo)流錐時(shí)進(jìn)水流道的水力損失較大,最大差值達(dá)0.05m。導(dǎo)流錐對水泵裝置效率影響較大,增幅達(dá)4.1%,增設(shè)導(dǎo)流錐可顯著提高水泵裝置效率。
[Abstract]:In order to study the influence of diversion cone on hydraulic performance of low head bidirectional axial flow pump device, taking a pumping station in southern Jiangsu as an example, two schemes with no diversion cone are set up, based on RNG turbulence model. The CFD method is used to calculate the three-dimensional turbulent flow of the two-direction axial flow pump device. The results show that the water flow pattern of the inlet channel is more disordered than that of the diversion cone without the diversion cone. The flow of water flows from the inlet channel below the bell mouth to the inlet, and the singularity appears at the center of the bell mouth; When there is a diversion cone, the diversion cone occupies the position of the singularity below the bell mouth and eliminates the singularity. When there is a diversion cone, the uniformity of the outlet flow field is better, and the hydraulic loss of the inlet channel increases gradually with the increase of the flow rate. When there is no diversion cone, the hydraulic loss of inlet passage is larger, the maximum difference is up to 0.05m.The diversion cone has a great influence on the efficiency of pump unit, and the increase is up to 4.1, and the efficiency of pump installation can be improved significantly by adding diversion cone.
【作者單位】： 河海大學(xué)水利水電學(xué)院;河海大學(xué)能源與電氣學(xué)院;
【基金】：國家自然科學(xué)基金項(xiàng)目(51579080,51339005) 安徽省自然科學(xué)基金項(xiàng)目(1608085ME119) 中央高�；究蒲袠I(yè)務(wù)費(fèi)項(xiàng)目(2015B34314)
【分類號(hào)】：TV136.2
【正文快照】： 1引言進(jìn)水流道的水力設(shè)計(jì)對泵裝置水力性能的影響很大,進(jìn)水流態(tài)不良不僅會(huì)降低泵的能量性能、空化性能,甚至還會(huì)產(chǎn)生影響水泵穩(wěn)定運(yùn)行的吸氣渦帶或水下渦帶。進(jìn)水流道內(nèi)的導(dǎo)流錐可避免進(jìn)水流道內(nèi)的死水與動(dòng)水相互摩擦撞擊而造成流態(tài)紊亂,以減少渦流、汽蝕,故有必要對進(jìn)水流道

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