Patent ID: 7778030

Claim:
A method for cooling a target element comprising: driving a jet of coolant from a back side of a material layer through an opening in said material layer for impingement with a predetermined location on said target element, said opening being a slot having a first end and a second end, said jet having a first side corresponding to said first end of said opening, and said jet having a second side corresponding to said second end of said opening; and actuating a first transducer to produce a first output signal for perturbing said jet said first transducer being positioned between said material layer and said target element and located at said first end of said opening; and actuating a second transducer to produce a second output signal for perturbing said jet, said second transducer being positioned between said material layer and said target element and located at said second end of said opening, said first and second output signals stabilizing said first side of said jet such that said jet provides substantially uniform cooling of said target element in a first direction radiating away from said predetermined location, and said first and second output signals de-stabilizing said second side of said jet such that said jet provides non-uniform cooling of said target element in a second direction radiating away from said predetermined location.