Vol.32,No.4 Apr.2016 DOI: /j.issn Simulationandanalysisofchiliflowcharacteristicsinbendingfilingpipes ZHOU Pe

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2016 4 Vol.32No.4 Apr.2016 DOI:10.13652/j.issn.1003-5788.2016.04.

1 Vol.32No.4 Apr.2016 DOI: /j.issn Simulationandanalysisofchiliflowcharacteristicsinbendingfilingpipes ZHOU Peng YU Li-ya HE Ling YANG Zheng-tong ( ) (Key Laboratoryof Advanced Manufacturing TechnologyMinistryof Education Guizhou UniversityGuiyangGuizhou550003China) : [1] 90 Mixture 579 m/s : 1 ; : ;Mixture ; ; ; ; Abstract:Inordertooptimizethedesignofchili'sFilingpipeline takingsolid-liquid multiphasefluidofchiliastheresearchcontent ableturbulencecriticalspeedforthechilifilingpipelineusingthe mixturemodelofmultiphaseflowthedistributionofvelocityfield anddensityfieldwasanalyzedwithinletflowrateas579 m/s. Theresultsshowthatitiseasytoformstratificationwhenthespeed islessthanthecriticalspeed.geometricbendhaslargeinfluenceon multiphaseflowfield.thelengthofstraightpipesectionbetweenthe 90 horizontalbendmodelastheresearchobjectcalculatingthesuit- elbowandspoutshouldnotbetoolarge.theresultsprovidefavora- bledatabasesforfilingconveyorspeedsetingintheoilpepper productsfilingequipment. Keywords:chilioil;mixture model;elbow pipe;solid-liquid multi- phasefluid;filingspeed;pipingdesign CFD [2] CFD [3] : ( : ); ( : [2012]6008) : 1 : (1982 ) @qq.com Figure1 Chiliautomaticfilingprototype : three-dimensionalstructure 98

2016 4 [4] CFD 980kg/m 3 0.065Pa s; [5] CFD 1280kg/m 3 5 mm 5s 3 70% 975kg/m 3 8mm 10% 1.2 Re 90 Re Mixture [6] 1 1.

2 [4] CFD 980kg/m Pa s; [5] CFD 1280kg/m 3 5 mm 5s 3 70% 975kg/m 3 8mm 10% 1.2 Re 90 Re Mixture [6] mm 1200mm 300mm 2 SolidWorks O 40 3 : Re = ρ vd (1) η : v m/s; ρ kg/m 3 ; η Pa s; D m ICEM Re<2300 Re=2300~4000 [7] Re>4000 Re>10000 Re>2000 (1) : 2 90 Figure2 90 bendstructurediagram mm 3 90 Figure3 Meshof90 bendpipe v= Re η ρd ( 2) 980kg/m Pa s; 0.1m kg/m kg/m 3 (2) Vc 1.33m/s; Vm 6.73m/s 1.3 Mixture [8-10] (3) : t ( ρ )+! ( m ρ mv m )=0 (3) : 99

: v m m/s; ρ m kg/m 3 ;! 1.3.2 (4) : t ( ρ mv m )+! ( ρ mv mv m )=-!p +! [ μ m (!v m +!v m T )]+ρ mg +F +! ( n : k=1 ak ρ kv drkv drk) (4) n 1 2 3 ; 9.

3 : v m m/s; ρ m kg/m 3 ;! (4) : t ( ρ mv m )+! ( ρ mv mv m )=-!p +! [ μ m (!v m +!v m T )]+ρ mg +F +! ( n : k=1 ak ρ kv drkv drk) (4) n ; 9.81m/s 2 z p N; F N; ak k ; v drk k m/s; μ m Pa s; μ Pa s; L μ Pa s S (5) : n t k=1 n (ak ρ kek)+! k=1 akv [ k( ρ kek +p ) ] =! (keff!t)+se (5) : (VELOCITY INLET) (OUTFLOW) RNG k-ε 2 ( 579m/s) 2.1 7m/s ; keff SE ; ; 2 Ek k J : θ=45 5 ; 4 Figure4 Contrastofvelocityfielddistributionofthetwokindsoffluid θ=45 Figure5 Contrastofvelocityfielddistributionofthetwokindsoffluidinthecrosssectionofθ=45

4 m/s θ m/s 7 m/s 7 : 300 mm ; 6 Figure6 Velocityfielddistributionofflowatdiferentspeedonthetypicalcrosssectionofpipebending 7 Figure7 Densitydistributioncloudofflowfieldatdiferentspeed 101

5 : 8 v=5 m/s ; 8 Figure8 Densityfielddistributionofflowatdiferentspeedonthetypicalcrosssectionofpipebending 3 Mixture 90 (4) : (1) 300mm (2) ; ; 102 (3) v=7m/s ( 159 )

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mm 2 α. ( ) β. ( ) Figure Structurediagram ofpneumaticseparatingdevice forlotusseedshelandkernel. CFD-DEM k-

mm 2 α. ( ) β. ( ) Figure Structurediagram ofpneumaticseparatingdevice forlotusseedshelandkernel. CFD-DEM k- OOD & MACHINERY 206 2 食品与机械 Vol.32No.2 Dec.206 DOI:0.3652/j.issn.003-5788.206.2.09 CFD-DEM Simulationoptimizationandtestofpneumaticseparatingdeviceforlotusseed shelandkernelbasedoncfd-demcouplingmethod