SlotJet¶

class acoular.environments.SlotJet¶

Bases: FlowField

Provides an analytical approximation of the flow field of a slot jet.

See [2] for details.

v0 = Float(0.0, desc='exit velocity')¶

Exit velocity at jet origin, i.e. the nozzle. Defaults to 0.

origin = CArray(dtype=float64, shape=(3,), value=array((0.0, 0.0, 0.0)), desc='center of nozzle')¶

Location of a point at the slot center line, defaults to the co-ordinate origin.

flow = CArray(dtype=float64, shape=(3,), value=array((1.0, 0.0, 0.0)), desc='flow direction')¶

Unit flow direction of the slot jet, defaults to (1,0,0).

plane = CArray(dtype=float64, shape=(3,), value=array((0.0, 1.0, 0.0)), desc='slot center line direction')¶

Unit vector parallel to slot center plane, defaults to (0,1,0).

B = Float(0.2, desc='nozzle diameter')¶

Width of the slot, defaults to 0.2 .

l = Float(5.2, desc='flow establishment length')  # noqa: E741¶

Nondimensional length of zone of flow establishment (jet core length), defaults to 5.2

v(xx)¶

Provides the flow field as a function of the location. This is implemented here only for the component in the direction of flow; entrainment components are set to zero.

Parameters:

xxarray of floats of shape (3, )

Location in the fluid for which to provide the data.

Returns:

tuple with two elements

The first element in the tuple is the velocity vector and the second is the Jacobian of the velocity vector field, both at the given location.