Systems and methods for determining fluid flow across a test component

A test component comprising:

• a first gas channel formed in the test component;
• a surface at least partially coated with pressure sensitive paint;
• and
• one or more seed channels formed in the test component extending from the first gas channel to the surface, the one or more seed channels defining one or more seed holes formed in the surface opposite the first gas channel, the one or more seed channels extending from the first gas channel at an angle of greater than or equal to 70 degrees and less than or equal to 110 degrees relative to the surface.

A method for detecting fluid flow across a surface of a test component, the method comprising:

• applying pressure sensitive paint to a test component, the test component comprising:
• a first gas channel formed in the test component;
• a surface at least partially coated with pressure sensitive paint;
• and
• one or more seed channels formed in the test component extending from the first gas channel to the surface, the one or more seed channels defining one or more seed holes formed in the surface opposite the first gas channel;
• triggering a first gas source to deliver a first gas into the test component and through the one or more seed holes;
• triggering a second gas source to deliver a second gas across the one or more seed holes;
• and
• determining whether an angle between a seed flow streak of the first gas exiting the one or more seed holes and an imaginary line extending from the respective seed hole parallel to a centerline of the test component is greater than a predetermined threshold.