Tutorial 1 Sample Problem 1 (Draft)
1. Start Hytran Program
2. Make following changes:
a.
Select Schematic in Drawing Option
b.
Line 1: Hytran Training
c.
Line 2: Sample Problem 1
d.
Line 3: Surge and water hammer analysis for load rejection
e.
Click OK button
3. Draw pipe tool activated by default.
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Tutorial 1 Sample Problem 1 (Draft)
4. Draw two pipe as shown below:
5. Define level
a. Go to List Data Menu
b. Select 2. Node Coordinates command
c. List Network Data dialogue box open
d. Make changes in Elevation column only, node 1 elevation 1830, node 2 elevation
1810 and node 3 elevation 1215.
e. Click OK button
f. Select full size zoom option
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Tutorial 1 Sample Problem 1 (Draft)
6. Edit pipe data
a. Select input tool from Select BC tool bar
b. Select Pipe 1 and make change in Pipe Dialog dialogue box as follow:
Pipe Length (m):
8700
Diameter (mm):
3070
Discharge (m^3/s):
7.72
Wall Thickness (mm):
50 (assumed no significant role in calculation for
tunnel)
Select Pipe Material:
Concrete (notice change in Elasticity, Poisson’s
Ratio, and Friction Factor value)
Pipe Constraints:
3. Fully Anchored
Type of Pipe:
3. Circular Tunnel (eg Rock)
c. Click OK button
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Tutorial 1 Sample Problem 1 (Draft)
d. Select Pipe 2 and make change in Pipe Dialog dialogue box as follow:
Pipe Length (m):
1500
Diameter (mm):
1600
Discharge (m^3/s):
7.72
Wall Thickness (mm):
30
Select Pipe Material:
Steel (notice change in Elasticity, Poisson’s Ratio,
and Friction Factor value)
Pipe Constraints:
1. Expansion Joints
Type of Pipe:
1. Thin Walled (D/e > 25)
e. Click OK button
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Tutorial 1 Sample Problem 1 (Draft)
7. Defining BC at node
a. Select upstream reservoir tool from Select BC tool bar
b. Click on node 1
c. Select surge tank tool from Select BC tool bar
d. Click on node 2
e. Select Downstream valve tool from Select BC tool bar
f. Click on node 3
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Tutorial 1 Sample Problem 1 (Draft)
8. Input BC
a. Select Input tool from Select BC tool bar
b. Select node 1 or Select upstream reservoir
c. URES: Upstream Reservoir dialogue box open and make following changes in it:
Reservoir Level RL (m):
1840
d. Click OK button
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Tutorial 1 Sample Problem 1 (Draft)
e. Select node 2 or Select surgre tank
f. SURG: Surge Tank Data dialogue box open and make following changes in it:
Tank Diameter (m):
7
Minimum Water RL (m):
crown)
1820 (select value above inlet/tunnel
Inlet Diameter (m):
3.07
Inflow Coefficient Cd:
1
Outflow Coefficient Cd
0.5
Print Surge Data
√
g. Click OK button
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Tutorial 1 Sample Problem 1 (Draft)
h. Select node 3 or Select downstream control valve
i. VALD: Downstream Control Valve dialogue box open and make following
changes in it:
Rated Discharge (m3/s):
7.72
Diameter (mm):
582 (select value such that Estimated Rated
Head will be about net head of the system,
shall be updated before running model)
Time of Operation (s):
20
Valve Opening:
1
0
(open
Close)
Time (s)
0
20
(open time
Close time)
Head Loss Discharge Coefficient (Cd):
j.
Select Cd
No of Coefficients:
11 (For detail value see image)
Print Surge Data
√
Click OK button
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Tutorial 1 Sample Problem 1 (Draft)
9. Transient Setup
a. Select Node Sequence command tool.
b. Select Let the computer select option in Select Node Sequence in Node
Sequence Dialogt dialogue box.
c. Click on OK button.
d. Select Select HGL pipes command tool.
e. Select Let the computer select option in Manually Select HGL Pipe Profile in HGL
Pipe Profile dialogue box.
f. Click on OK button.
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Tutorial 1 Sample Problem 1 (Draft)
g. Check sequence, Click on OK button in Hytran dialogue box.
h. Select Select Plot Nodes command tool.
i. List Network Data Dialogue box open input as in image:
j.
Click on OK button
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Tutorial 1 Sample Problem 1 (Draft)
k. Go to Check Network Menu
l. Select Check Network Command
m. Click on OK button in Dialog dialogue box
n. Check Error Massages dialogue box for error and close it
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Tutorial 1 Sample Problem 1 (Draft)
o. Select Setup Parameters command tool
p. Make following changes in Pipe Network Parameters dialogue box
Network Data tab
Minimum No Sub‐Reaches (s): 10
Maximum Run Time (s): 800
Scale and Plotting Parameters tab
Select Plot HGL Head
Plot HGL Profile Head :
Min (m)
1200
Max (m)
2000
Plot Node Line Head :
Min (m)
1820
Max (m)
1900
Plot Node Position:
3
q. Click on OK button
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Tutorial 1 Sample Problem 1 (Draft)
10. Run Model
a. Select Go command to analyse/run the model.
b. Select yes to save the model in Hytran dialogue box.
c. Select Save button in Save As dialogue box
d. Note the Warning if any and change BC as required
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Tutorial 1 Sample Problem 1 (Draft)
e. Close new Hytran window
f. Make necessary change in BC Downstream Control Valve
g. .Repeat process 10a to 10c
h. Click on Go command tool to run transient
i. After completing the model run close the window
11. Go to Report menu
12. Select Network diagnostic and note time step
13. Go to Report menu
14. Select Output Listing to check output
15. Record Surge tank result at end and maximum and minimum pressure with their
location
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Tutorial 1 Sample Problem 1 (Draft)
16. For Water hammer oscillation make following changes in Pipe Network Parameters
dialogue box (Alternatively these parameter can be changed in run window)
17. Repeat process 10
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1. Check Salient feature
2. Open general layout and find x, y coordinates (node coordinates) at the bend location
(horizontal and vertical bend) or section change or junctions etc
3. Open tunnel and penstock drawing to find the elevation at the each nodes, the result
shall be as resembles to 03_Cordinates and data.xlsx file
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