Patent ID: 7513745

Claim:
A passageway through which a fluid flows in a first direction, said passageway comprising: a plurality of trip strips positioned within the passageway; adjacent ones of said trip strips being oriented to converge towards each other at a first end to from an apex portion and to form a first region in which turbulence is created; said apex portion being at an angle with respect to said first direction and having an opening through which said fluid enters said region and forms two fluid cells which unite into a single fluid cell as more fluid enters said opening and which single fluid cell spreads throughout the region and occupies most of the area of the region resulting in full turbulence within said region; said passageway having first and second opposed walls; said plurality of trip strips forming a plurality of regions aligned along an axis transverse to said first direction; and said plurality of regions being formed by at least two rows of trip strips, each said row of trip strips having a first trip strip angled at a first angle with respect to said first direction, a second trip strip angled at a second angle with respect to said first direction, and a third trip strip angled at a third angle with respect to said first direction.