Patent ID: 11933334
Assignee: ENTERPRISE SCIENCE FUND, LLC
Field: Mechanical elements (Mechanical engineering)
Classification: CPC B  F  Y | IPC B  F

Claim 6:
7. A turbulent boundary layer control system, comprising:
one or more actuators on a surface of an object, wherein each actuator is controllable to inject momentum into a turbulent boundary layer of a fluid flowing relative to the surface with a friction Reynolds number, Reτ, greater than 200; and
a controller to operate the one or more actuators according to an oscillation period based on a time scale multiplier, T+, of at least 150 to inject momentum into the turbulent boundary layer in a direction transverse to a flow direction of the fluid relative to the surface,
wherein the time scale multiplier, T+, is selected such that the injected momentum disrupts large-scale eddies having a range of characteristic time scales exceeding 150η′, where η′ is a viscous time scale of the turbulent boundary layer of the fluid.