Abstract
Due to the high sediment content in the Yellow River, the pump units in the pumping stations along the line are often eroded by sediment, causing the reduction of pump efficiency and structural damage. The purpose of this paper is to study the influence of particle diameter on the particle track, erosion distribution and erosion rate in a double-suction centrifugal pump in a pumping station of the Yellow River with a Lagrangian particle-tracking approach and a Tabakoff erosion model. The results show that the surface erosion of the impeller on both sides in the double-suction centrifugal pump has an asymmetric distribution, and the erosion rate on both sides is different. The particle diameter affects the moving trajectory of particles and has a significant effect on the erosion morphology and position in the impeller. With the increase of particle diameter, the velocity of the particles moving towards the pressure side of the blade inlet increases, resulting in punctate impact erosion. When the particle diameter decreases, sliding abrasion gradually forms on the pressure side of the blade outlet. The change rule of the solid particle volume fraction on the impeller wall is consistent with that of erosion distribution on the impeller wall. The larger the solid volume fraction is, the higher the wall erosion rate is.
Highlights
The Yellow River has the highest sediment concentration in the world
Double suction centrifugal pumps have the characteristics of large flow, high head and good cavitation performance [2]
Liu [8] found that the properties of discrete particles and impeller speed have important influence on the trajectory of solid particles and the process of wall collision by tracking the particle trajectory in a solid-liquid flow field and numerical simulation of solid-liquid two-phase flow
Summary
The Yellow River has the highest sediment concentration in the world. Many large pumping stations have been built along it for irrigation and urban water supply [1]. Double suction centrifugal pumps have the characteristics of large flow, high head and good cavitation performance [2]. Double suction centrifugal pumps are used in more than 70% of the pumping stations along the Yellow River [3]. Due to their high content, the sediment particles have serious erosion and wear on the flow passage of the pumps, which seriously affects the normal operation, reduces the working efficiency and has a great impact on the normal production [4,5]. A large amount of literature has studied and analyzed the solid-liquid two-phase flow in centrifugal pumps, with especially profound research upon the erosion and damage of the parts of the centrifugal pump flow passage [6]. The velocity of particles on any trajectory can bMe oeabntawinheilde,biyn othrdeeLratgoreannsgueremtehtehoredl.iabXiulit[y13o]f uersoesdiotnhirsatme eptrheoddicttioonsi,mFiunlnatiee [t1h4e], mToavbeamkoefnf t[1o5f]s,oElnidgipna[r1ti6c]leasnidn Kthheucreanntariefut galal[1p7u]mhapv, eanpdrotphoesperdeddiicffteerdenretseurlotssiaorne rcaloteseptroetdheicetixopnermimodeneltsa.lTrehseusletse.mpirical models are basically established on the basis of erosion testsM, aenadnwthheialec,tuinalovradreiarbtolesen(ismurpeactht everleolciaitbyi,liitmy poafcetraonsgiolenarnadteipmrpeadcictttiiomne,sF)idnentieerm[14in],e (TpttmeC[c(mTtehrarhC2osooeaebo0oetnoddsbsam,dvit2m,aiekovDecae1Dlapkonantpll]un[iouulfu.t1ouumfedf[te9eonf1tae[t]aoft9t1etoo.mhtidoto]5rifoThe.tooefo]nhthte,nlsadThhtaeeicaEapheehoerltrlcluneesenuFescosFergm.iaolemmesmluiTlmuvnpsivvhpooaiidoipdsaaenr[lrdmel1erisrDgeeaDsix6eieaaxalobyi]syecbtiblmtalntycimaneallyrtaeuensteeaeospmis.rrodmof.aaim(lfnriTiitttiTcKimthetucochesahhseharrbrpleeeXeeolauXyflrarmtn)tfereca)ou,hlcag,tocwotoaranatchwvetdrtmhruaheeeiseeerneltpihleFohatnsFtaowYttictawarinhewtientaiothrneonlylebnslesi,godryie[thbdioer1whemwaooe[t7cfe[1sawftao]1piRia8acttucm8iahsuha]itan]vliclaltepnlctgttetlevrhuyhgaerraoemeer,rleonesamriotseniosgpahtsoicixtagcsloreioaanepiochornnbolhwenecpiamlnnurirminoainsieeptlodmsrhpseahorredeueyrtrediediyedemtrldonehtaeldsnliatodnpleaciaanaancidatnltefdtrindcifdoirtxevtoetodhehnspterpntTsehueeieTlutammyelnbreamhtblidatstfhbemoaisesogsaiedktiwa[g)edhhskr2oednhodeeo0olfssotslsfef,fTetass2ipftueeoadliee1tneirddbrnrie]rnoromm.aiiedoCmsesrksCisesiiauFooonietnFtoohXlfnnneettfXnnest ctohneteenrot soifonthoefptuhme pprinogtostytapteiodnoaulobnleg-stuhcetiYoenllcoewntRriifvuegr,atlhpeuremapr.eIrneltahtiisvpelaypfeerw, thsteupduierspoonse tihsetoersotsuiodny othf ethienfpluroetnocteypoef tdhoeupbaler-tsiculcetidoinamceentterrifoungathl epupmarpti.cIlen ttrhaicskp,aeproers,iothnedpisutrrpibousetioisn taonsdtuedroystihoen irnaflteuiennacedoofutbhlee-psuacrttiioclne cdeinatmriefutegraol nputhmeppianrtaicpleumtrapcinkg, esrtoastiioonn odfisthtreibYuetliloonw aRnidveerrowsiiothnaraLtaegirnaangdioaunbplea-rstuiccltei-otrnacceknintrgifaupgparlopaucmh panidn aa Tpuabmapkionfgf esrtoastiioonn omfothdeelY, ewllhoiwch Risivheerlpwfiuthl taoLsoaglvreanthgeiapnrpobarletimcleo-ftraabcrkaisnigonapdparmoaacghe ainndenagTinaebearkinofgf.erosion model, which is helpful to solve the problem of abrasion damage in engineering
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