抄録
Experiments have been performed for a turbulent channel flow obstructed by two parallel triangular cylinders in tandem arrangement. The triangular cylinder of two kinds of the angle is used. The first and second triangular cylinder is same. The clearance between the wall and the triangular cylinder is changed in three steps. The distance between two triangular cylinders is varied from 80mm to 300mm. The total performance between pressure drop and heat transfer are estimated under the condition of an equal pumping power. When the angle of triangular cylinder is 45 degrees and the clearance is small (S=1mm), the highest performance is obtained.
