System and method for optimizing passive control strategies of oscillatory instabilities in turbulent systems using finite-time Lyapunov exponents

A system for controlling onset of oscillatory instabilities in a turbulent flow system, the system comprising:

• a memory unit;
• one or more measuring devices configured to measure data associated with turbulent flow system incorporating a control strategy in the flow field;
• a processor coupled to the memory unit, wherein the processor is configured to:
• receive data from one or more measuring devices connected to the turbulent flow system;
• determine one or more flow characteristics from the data obtained from the measuring devices;
• compute critical dynamics from backward time finite-time Lyapunov exponent (FTLE) fields based on the one or more flow characteristics;
• and
• identify one or more regions of critical dynamics associated with impending oscillatory instabilities in the turbulent flow system;
• and
• a passive control unit configured to disrupt the identified region of critical dynamics to control the onset of oscillatory instabilities in the turbulent flow system.

A computer program product having non-volatile memory therein, carrying computer executable instructions stored therein to control onset of oscillatory instabilities in a turbulent flow system, the instructions comprising:

• receiving data from one or more measuring devices connected to the turbulent flow system incorporating a control strategy in the flow field;
• determining one or more flow characteristics from the data obtained from the measuring devices;
• computing critical dynamics from backward time finite-time Lyapunov exponent (FTLE) fields based on the one or more flow characteristics;
• identifying one or more regions of critical dynamics associated with impending oscillatory instabilities in the turbulent flow system;
• and
• disrupting the identified region of critical dynamics to control the onset of oscillatory instabilities in the turbulent flow system.