ROTA METER H MANDMETER TAPPINGS B C 20 FLEV VENTURI NETEN WIDE ANGLE OIFFUSER ORIFICE METER 90 DEGALE ELBOW Fig.4. Expla

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Rota Meter H Mandmeter Tappings B C 20 Flev Venturi Neten Wide Angle Oiffuser Orifice Meter 90 Degale Elbow Fig 4 Expla 1 (295.15 KiB) Viewed 18 times

Rota Meter H Mandmeter Tappings B C 20 Flev Venturi Neten Wide Angle Oiffuser Orifice Meter 90 Degale Elbow Fig 4 Expla 2 (143.53 KiB) Viewed 18 times

Rota Meter H Mandmeter Tappings B C 20 Flev Venturi Neten Wide Angle Oiffuser Orifice Meter 90 Degale Elbow Fig 4 Expla 3 (91.21 KiB) Viewed 18 times

Rota Meter H Mandmeter Tappings B C 20 Flev Venturi Neten Wide Angle Oiffuser Orifice Meter 90 Degale Elbow Fig 4 Expla 4 (75.72 KiB) Viewed 18 times

Rota Meter H Mandmeter Tappings B C 20 Flev Venturi Neten Wide Angle Oiffuser Orifice Meter 90 Degale Elbow Fig 4 Expla 5 (39.71 KiB) Viewed 18 times

ROTA METER H MANDMETER TAPPINGS B C 20 FLEV VENTURI NETEN WIDE ANGLE OIFFUSER ORIFICE METER 90 DEGALE ELBOW Fig.4. Explanatory diagram of flow measuring apparatus PROCEDURE The flow measuring apparatus is connected to the hydraulic bench water supply and the control valve is adjusted until the rotameter is about at mid-position in its calibrated tapered tube. Air is removed from the manometric tube by flexing it. The pressure within the manometer reservoir is now varied and the flow rate decreased until, with no flow, the manometric height in all tube is about 280mm.the apparatus can be levelled and the level checked by comparing the manometric heights when no water flows. A set of experimental readings can now be obtained. Take the data and fill the table 1 at various speeds by filling the water tank with 15 kg water at each run. Do not rise above 0.37 kg/s mass flow rate. CALCULATIONS 1. Calculate the mass flow rates and head losses for each element and fill in table 2. 2. Plot calibration curves of elements on the same graph.(AH meter vs inmeter) 3. Plot the mass flow rate of element, mm, versus mass flow rate, me, which is found from weight tank on the same graph and assuming the least square method fit an equation for each plot. 4. Calculate the head loss AH, and the inlet kinetic head,KE, of each section then fill the table 3. 5. Plot the curves ΔΗ,c/KE, vs KEA ДНcp/KEc VS KEC AHHI/KE VS KEH

VS On the same graph, AHEF/KER KER AHGH/KEC vs KEG 6. Estimate the appropriate error in the Venturi-meter, orifice meter and rotameter which can be calculated as them the $100 e(%) mt (Use equations in calculation 3) 7. Discuss the results and write conclusion. HINTS the manometric level indicates the hydrostatic heads.CP/pg) -For Venturi meter, AHAB is negligible -For orifice meter, V V K?(hg - hp) 2g 2g Where K=0.601 for this apparatus (K: discharge coefficient) -For rotameter, Use calibration curve -If the diameter of pipe increases two times, mean velocity is one quarter of that in the upstream section and kinetic head is 1/16 of that in the upstream section or vice versa. e.g. VŽ KE2 = 29 REFERENCES 1. Fluid Flow, Sabersky & Acosta. 2. Fluid Mechanics and Hydraulics, Giles Company Notes. 3. Experimental Methods for Engineers, Holman.

MANOMETRIC LEVELS(mm) DEFG A A H 1 Bc Rotameter Water (cm) (kg) Time (seconds) 110 310 270 290 300 302 260 258 267 165 7 5 Run no 1 2 3 4 5 250 304 258 250 140 320 330 305 312 308 316 234 212 10 13 102 96 235 310 216 232 5 5 5 118 358 200 322 329 335 170 158 186 61 17 nun 8.8 380 173 334 345 354 130 120 165 20 19.5 5 80

m(kg/s) Venturi Orifice Rotameter Weight tank RUN NO 1 2 3 4 5

Inlet Kinetic Head , KE AH/KE RUN NO 1 2 3 4 5 Nimi