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

Claim 0:
1. A turbulent boundary layer control system, comprising:
an actuator on a surface of an object that 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 1,500; and
a controller to operate the actuator according to an oscillation period based on a time scale multiplier, T+, of at least 300 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 modifies large-scale eddies having a range of characteristic time scales exceeding 300η′, where η′ is a viscous time scale of the turbulent boundary layer of the fluid.