1 / 11

53:071 Principles of Hydraulics Laboratory Experiment #4 Weir Calibration

53:071 Principles of Hydraulics Laboratory Experiment #4 Weir Calibration. Li-Chuan Chen, Marian Muste, and Larry Weber. Objective.

ivana-russo
Download Presentation

53:071 Principles of Hydraulics Laboratory Experiment #4 Weir Calibration

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. 53:071 Principles of HydraulicsLaboratory Experiment #4Weir Calibration Li-Chuan Chen, Marian Muste, and Larry Weber

  2. Objective • To determine the head-discharge relationship of three different shapes of weirs, and to compare the experimental results with their corresponding analytical expressions.

  3. Principle

  4. Principle Slope Intercept

  5. Apparatus — Flume

  6. Apparatus — Weirs

  7. Procedures • Insert the weir of the desired shape. • Record the reference point of the weir. • Set the appropriate discharge in the flume. • Record the water surface elevation upstream of the weir • Repeat Steps 3 and 4 for four more discharges. • Repeat Steps 1 to 5 for two more weir shapes.

  8. Discharge Triangular 60 h (ft) Q (cfs) Ref. Point (ft) W.S. Elev. (ft) Weir Head (ft) Data Sheet

  9. Analysis • Determine the discharge Q in the flume (using the side-contraction meter) and the head H on the weirs. • Using several measured Q-H pairs, plot log Q versus log H. • From the best-fit line to the experimental points, determine the kexp (the intercept) and nexp (the slope). • Compare kexp and nexp with values indicated in the literature.

  10. Sample Result

  11. Further Considerations • Derive, analytically, the head-discharge relationship for each of the weir shapes. • If data seem to imply nexp ntheory, why?

More Related