Flow over Weirs

EXPERIMENT 1 RECTANGULAR AND TRIANGULAR WEIRS Aim To analyse the discharge- soul characteristics of a orthogonal weir and 60° and 90° triangular weirs. Equipment Preparation. bone the equipment to the following specification in accordance with division 4.2 Weirs                 P6225 simple-minded Weirs Accessories       P6107 Hook Gauge and Scale Experimental Procedure. 1. | fuck off the pump and tardily open the bench regulating valve until the body of water train r individuallyes the cover of the weir and measure the water level to determine the data point level.| 2. | specify the bench regulating valve to crack the first required head level of approximately 10mm. respect the come down rate employ the volumetric tank or the rotameter. Observe the build of the nappe.| 3. | amplification the flow by rise the bench regulating valve to represent up heads above the datum level in steps of approximately 10mm until the regulat ing valve is to the full open. At each terminal figure measure the flow rate and observe the shape of the nappe.| 4. | finis the regulating valve, stop the pump and then replace the weir with the undermentioned weir to be tested. extract the test procedure.| 5. | Repeat the test with the third base weir. | Results and Analysis. 1. | record book the results on a copy of the results sheet.

Record every observations of the shape and type of nappe paying particular attention to whether the nappe was clinging or sprung clear, and of the reverse contraction and general change in shape.| 2. | fleck a graph of loge Q against loge H for each weir. streak the slopes and the solici ts. Calculate the coefficient of discharge f! rom the grab. Express the relationship in the midst of the head and the discharge in the form: for each weir. From the intercept calculate the coefficients of discharge and from the slopes of the graphs confirm that the index is approximately 2.5 for the immaterial weir and 1.5 for the triangular weirs.| 3. | Compare the results with those predicted using the empirical...If you want to get a full essay, order it on our website: OrderEssay.net

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