Please use this identifier to cite or link to this item: http://krishikosh.egranth.ac.in/handle/1/5810060576
Authors: Farecdl Ahmed. Md et.al.
Editor: SHIVAKUMAR, A.
Title: STUDY OF FLOW CHARACTERISTICS OF DIFFERENT ORIFICES AND MOUTHPIECES
Publisher: PROFESSOR JAYASHANKAR TELANGANA STATE AGRICULTURAL UNIVERSITY
Citation: CAES 30
Language: en
Type: Technical Report
Agrotags: null
Keywords: STUDY OF FLOW CHARACTERISTICS OF DIFFERENT ORIFICES AND MOUTHPIECES
Abstract: Reservoirsortankscanbecontrolledbynumberofhydraulicstructures,such assluicegates,weirs,pipesandorifices.Thesetypesofstructuresmaybeclassified intotwogroups.Inonegroup,the flowtakesplaceunderpressurethrougha fixed crosssectionasisthecasefororifices,nozzles,shorttubes,sluicewaysandgates.The second group includes cases in which the flow occurs through an initially undeterminedcrosssection,suchasoverweirs,spillways,chutesanddropstructures (Simon,1981). . In this studythe determination ofcoefficient ofdischarge, coefficient of velocityand coefficientofcontractionoforifices and coefficientofdischarge of differentmouthpiecesaretakenintoconsideration. Themeanvalues ofcoefficientofdischargeby constanthead method of Bourda,Converging-diverging,mouthpiecewith1/d=4,mouthpiecewith1/d=2.5are 0.79, 0.75, 0.8, 0.82 with Coefficient ofvariation 3.11, 3.98, 7.2, 6.7 percentage respectively.ThemeanvaluesofcoefficientofdischargebyTimefallmethodof Bourda,Converging-diverging,mouthpiecewith1/d=4,mouthpiecewith1/d=2.5are 0.84,0.81,0.86,0.86withCoefficientofvariation168, 1.97,4.77,3.18percentage respectively. Themeanvalues ofcoefficientofdischargeby constantheadmethod of Orificeof12mmandOrificeof10mmare0.78and0.66withCoefficientofvariation 7.04and3.86respectively.ThemeanvaluesofcoefficientofdischargebyTimeof fall method ofOrifice of 12mm and Orifice of10mm are 0.65 and 0.66 with Coefficient ofvariation 1.90 and 2.49 percentrespectively. Themeanvalues of CoefficientofvelocityofOrifices of12mm and 10mm are0.98 and 0.98 with Coefficientofvariation 1.82 and 1.64percentrespectively. Themean values of CoefficientofcontractionofOrificesof12mmand 10mmare0.79and0.67with Coefficientofvariation8.0and4.19percentrespectively. The Coefficient ofvariation is lowerin Bourda Mouthpiece followed by Converging-diverging, mouthpiece with 1/d=4, mouthpiece with 1/d=2.5. The CoefficientofvariationislowerinOrificeof101nmcomparedtoOrifice12mm. Keywords: Orifice,Mouthpiece,coefficientofdischarge,Coefficientofvelocity, Coefficientofcontraction.
Issue Date: 2017
Appears in Collections:B.Tech Theses

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