CE 321 Bernoulli Equation Lab Report Worksheet

List your objectives. / List your conclusions for each objective. Do so in order of importance. / List the specific results that support each conclusion.
·  To investigate the validity of Bernoulli’s Equation as applied to the flow of water in a tapering horizontal tube—specifically, to determine if the total pressure head remains constant along the length of the tube as the equation predicts. /
  1. The Bernoulli Equation asserts that the total head, hT, is constant along the length of a horizontal tube. Based on the results of this experiment, the measured total head does / does not remain constant for the flow of water in a tapering horizontal tube. Note the trends you observe.
a)  For converging section points (A through D), hTm was/was not constant for a given flow rate, compared to diverging section points (E and F). The Bernoulli assumptions were / were not satisfied in the converging portions of the tube.
b)  For diverging section points, E and F, hTm was / was not constant, indicating that one of the Bernoulli assumptions is valid / invalid along this portion of the tube.
If invalid, which assumption(s). Why?
c)  Total head measurements were more consistent at high/low/medium flow rate. /
  1. State Total head best estimate value (point A).
  2. List total head measurements, for all flows. Note the trends you observe.
  3. Refer to tables 1-3, and fig 1-3.
  4. List range of total head measurements for the converging section (for all flows). How closely are they related? (Quantify)
  5. List range of total head measurements for the converging section. How closely are they related? (Quantify)

·  To determine if the variations in static pressure head along the length of the tube can be predicted with Bernoulli’s Equation. /
  1. The Bernoulli Equation can/cannot accurately predict variations in static pressure head through the converging section of the tube. State what happens over the converging section, with respect to hSm and hsc. Note the trends you observe.
  2. The Bernoulli Equation can/cannot accurately predict variations in static pressure head through the diverging section of the tube.
  3. Is Bernoulli’s Equation a better predictor in the converging or diverging section? Note the trends you observe for different flow rates.
/
  1. List the values of hSm and hSc for all flow rates in the converging section. Note the differences between the two.
  2. Refer to the Bernoulli Equation, what happens to the static head and the velocity head as the diameter decreases? Refer to Figure 4 and list relevant values.
  3. State the differences between hSm and hSc for each of the flow rates.
*Make sure that you define the variables in your report.

10/30/09