Tests are performed on a 3-ft-long ship model in a water tank. Results obtained (after doing some data analysis) are as follows:
The assumption is that wave drag is done using the Froude number and friction drag by the Reynolds number. The fullsize ship will be 150 ft long when built. Estimate the total drag when it is cruising at 15 knots and at 20 knots in a freshwater lake.
The pressure head is a function of the flow rate, speed,
impeller diameter D, and water density ρ. Plot the pressure
head versus flow rate curve. Find the two Π parameters for
this problem, and, from the above data, plot one against the
other. By using Excel to perform a trendline analysis on this
latter curve, generate and plot data for pressure head versus
flow rate for impeller speeds of 600 rpm and 1200 rpm.