Fluid mixing systems and methods

1. A jet-mixer for a fluid mixing system, comprising:

a housing comprising a mixer port formed in an inner surface of the housing; and a rotor rotatably disposed in the housing, the rotor comprising a rotor blade;

wherein the rotor comprises a first angular position in the housing restricting fluid flow through the mixer port, and a second angular position allowing fluid flow through the mixer port;

wherein, in response to rotation of the rotor in the housing, the jet-mixer is configured to inject a first fluid jet through the mixer port into a passage of a fluid conduit that has a pulsed velocity profile.

2. The jet-mixer of claim 1 , wherein the pulsed velocity profile comprises a plurality of velocity cycles, each velocity cycle of the velocity cycles, comprising a maximum velocity, a minimum velocity, and a velocity transition extending between the maximum and minimum velocities, wherein the maximum velocity is greater than the minimum velocity.

3. The jet-mixer of claim 2 , wherein:

the rotor comprises a first surface area that is greater than a second surface area comprising an arcuate gap formed in the rotor; and

the minimum velocity for each velocity cycle of the pulsed velocity profile obtains for a greater period of time than the maximum velocity for each velocity cycle.

4. The jet-mixer of claim 1 , further comprising a motor coupled to the rotor, the motor configured to control a rotational speed of the rotor in the housing and thereby control a frequency of the velocity cycle of the pulsed velocity profile.

5. The jet-mixer of claim 1 , wherein the pulsed velocity profile comprises a sinusoidal velocity profile.

6. The jet-mixer of claim 1 , wherein the mixer port is defined by a curved inner surface.

7. The jet-mixer of claim 1 , wherein the mixer port is defined by a linear inner surface.

8. The jet-mixer of claim 1 , wherein the jet-mixer is configured to inject a second fluid jet through the mixer port into the passage of the fluid conduit that has a constant velocity profile when the rotor is held in the second angular position.

9. A fluid system for use with a fluid conduit, comprising:

a probe that extends into a central passage of the fluid conduit through a first port of the fluid conduit; and

a first conduit coupled between the probe and a jet-mixer and configured to direct a first fluid flow to the jet-mixer, wherein the first fluid flow is captured from the passage of the fluid conduit by the probe;

wherein the jet-mixer is configured to receive the first fluid flow from the first conduit and inject a first fluid jet into the passage of the fluid conduit that has a pulsed velocity profile, the first fluid jet configured to mix a conduit fluid flow disposed in the passage of the fluid conduit.

10. The fluid system of claim 9 , wherein the jet-mixer comprises:

a housing comprising a mixer port formed in an inner surface of the housing; and

a rotor rotatably disposed in the housing, the rotor comprising a rotor blade;

wherein the rotor comprises a first angular position in the housing restricting fluid flow through the mixer port, and a second angular position allowing fluid flow through the mixer port.

11. The fluid system of claim 10 , wherein:

the jet-mixer is configured to inject the first fluid jet through the mixer port into the passage of the fluid conduit in response to rotation of the rotor in the housing; and

the jet-mixer is configured to inject a second fluid jet through the mixer port into the passage of the fluid conduit that has a constant velocity profile when the rotor is held in the second angular position.

12. The fluid system of claim 10 , further comprising a fluid energizer coupled between the first conduit and the jet-mixer, wherein the fluid energizer is configured to energize the first fluid flow.

13. The fluid system of claim 12 , wherein the fluid energizer comprises a pump configured to pressurize the first fluid flow.

14. The fluid system of claim 13 , wherein the pump is configured to increase fluid pressure in the housing of the jet-mixer when the rotor of the jet-mixer is disposed in the first angular position.

15. The fluid system of claim 10 , further comprising a motor coupled to the rotor of the jet-mixer, the motor configured to control a rotational speed of the rotor in the housing.

16. The fluid system of claim 9 , further comprising a fluid sampler coupled to the first conduit and configured to capture a fluid sample from the first fluid flow.

17. A method for mixing a fluid flow in a fluid conduit, comprising:

providing a first fluid flow to a jet-mixer from a passage of the fluid conduit; and

injecting a fluid jet through a mixer port of the jet-mixer into the passage of the fluid conduit, the fluid jet having a pulsed velocity profile.

18. The method of claim 17 , further comprising increasing a rotational speed of a rotor of the jet-mixer to thereby increase a frequency of a velocity cycle of the pulsed velocity profile, the velocity cycle comprising a maximum velocity and a minimum velocity.

19. The method of claim 17 , further comprising pressurizing the first fluid flow provided to the jet-mixer using a pump.

20. The method of claim 17 , further comprising increasing an output pressure of a pump to thereby increase energy imparted to fluid in the fluid conduit from the fluid jet.