Instruments for pressure measurement

W = 0,1^.n, м³ (7)
where n – number of divisions of the dial of the counter;
0,1 m³ – the volume of water corresponding to one division of the meter's dial;
2. Time τ by stopwatch;
3. Readings of differential pressure gauges (9), (10), (11), (12), (13) в m.hg.c.;
4. The water temperature is a thermometer.
When processing the measurement results, calculate:

1. 
   Air flow rate
   

, м³/с (8)

2. 
   Average flow rate in the pipeline
   

, м/с (9)
3. Recalculate the mercury manometer readings in the water (10)
4. The coefficient of local resistance of rotation, gate valve, crane and check valve according to the formula:
(11)
5. Kinematic viscosity corresponding to the water temperature
, (12)
6. The Reynolds number
(13)
Students determine the equivalent length according to formula (2) and drag coefficients for friction using the Darcy-Weisbach formula. The obtained experimental data should be recorded in a table and, on the basis of experimental data, written down in a table and based on the experimental data, plotted curves with the application of experimental points.
Preset values

1. 
   The internal diameter of the pipe d = 5,08 sm.
   

2. Distance between sections А^* и В^* l = 6 m.

3. 
   γ_рт = 13,6 q/sm³; γ_вод = 1 q/sm³
   

№№	Hydraulic parameters	The results obtained from the experiments
		Turn				Gate valve				tap				Check Valve
		1	2	3	4	1	2	3	4	1	2	3	4	1	2	3	4
1.	The volume of water flowing in time W, m^3
2.	Time of water flow, τ
3.	Flow rate of running water, Q , m^3/s
4.	Average flow velocity in the pipe v, m/s
5.	The readings of differential pressure gauges,м.рт.ст.
6.	Frictional loss of friction,m.hg.c.
7.	Loss of pressure on local resistance: hg.c. w.c.
8.	Coefficient of local resistance
9.	Reynolds number
10.	Coefficient of hydraulic resistance
11.	Length equivalent

Note: In determining the head loss during cornering, it is necessary to take
into account the effect of changing the geometric head