Mechanical Engineering - Hydraulics and Fluid Mechanics - Discussion
Discussion Forum : Hydraulics and Fluid Mechanics - Section 1 (Q.No. 3)
3.
In a depressed nappe
Discussion:
26 comments Page 2 of 3.
Saravanan said:
10 years ago
What is nappe?
(1)
Sam said:
10 years ago
Which is the correct answer?
Gurmeet Singh said:
10 years ago
What is the means of negative pressure?
Rahul kumar said:
1 decade ago
Sometimes a weir is not fully ventilated, but is partially ventilated as shown in fig-2 (b). If the pressure below the nappe is negative, it is called a depressed nappe. The discharge of the nappe, in this case, depends upon the amount of ventilation and the negative pressure.
Generally, the discharge of a depressed nappe is 6% to 7% more than that of a free nappe. I hope it'll help you.
Generally, the discharge of a depressed nappe is 6% to 7% more than that of a free nappe. I hope it'll help you.
Rajendra Singh said:
1 decade ago
Because pressure toward downward direction is positive and toward upward direction is negative.
Biradar yogesh said:
1 decade ago
Half of double cone is called nappe.
Fakhre Alam said:
1 decade ago
Depressed Nappe:
In this type, a partial vaccum is created between the nappe and the weir. Discharge for such a flow situation is 8 to 10% greater than that with a free nappe.
In this type, a partial vaccum is created between the nappe and the weir. Discharge for such a flow situation is 8 to 10% greater than that with a free nappe.
Jatin said:
1 decade ago
Can any one tell me about the aeration of nappe?
Ganesh Gole said:
1 decade ago
One half of a double cone is called a nappe.
Vikas mahant said:
1 decade ago
The term Nappe when used in relation to hydro-engineering refers to the sheet of water over-topping a dam. It is an important issue in dam construction because unless air can be introduced into the nappe, the vibration of the water can lead to dam failure.
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