What is head equation?
hp—the pressure head = u/γw—the fluid pressure divided by the unit weight of the fluid. ht—the total head = he + h.
What does head mean in hydraulics?
In general, the hydraulic head, or total head, is a measure of the potential of fluid at the measurement point. It can be used to determine a hydraulic gradient between two or more points.
What is hydraulic head of pump?
Hydraulic head is a specific measurement of liquid pressure above a geodetic datum. Head is equal to the fluid’s energy per unit weight and is useful in specifying centrifugal pumps because their pumping characteristics tend to be independent of the fluid’s density.
What is total head in hydraulics?
The total hydraulic head of a fluid is composed of pressure head and elevation head. The pressure head is the equivalent gauge pressure of a column of water at the base of the piezometer, and the elevation head is the relative potential energy in terms of an elevation.
What is the formula of velocity head?
It has the physical dimension of length (hence the term “head”), and corresponds to an energy per unit weight. If u is the velocity and g the acceleration due to gravity, the velocity head is defined by u2/2g.
What is head in Bernoulli equation?
The velocity head represents the kinetic energy of the fluid. It is the height in feet that a flowing fluid would rise in a column if all of its kinetic energy were converted to potential energy. The pressure head represents the flow energy of a column of fluid whose weight is equivalent to the pressure of the fluid.
What is pump head formula?
The pump head H=z+hw z is the height difference of the pumping height, that is, the water level from the inlet to the water surface at the exit. Hw is the head loss, including the Darcy formula or Xie Cai formula for calculating the head loss hf and the local head loss hw hf along the path.