1列傾斜ピンフィン群を設置したエンドウォールの熱伝達

概要

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The effect of a single row of oblique pin fins on the endwall heat transfer is investigated experimentally using two types arrangement. One is the "single row" arrangement, in which all the pin fins are inclined to the same direction, and the other is the "cross row" arrangement, in which the pin fins are alternately inclined upstream and downstream. Pin fins are inclined to the streamwise direction from θ=-60 degrees (upstreamwise) to +60 degrees (downstreamwise), where θ is an angle between the axis of pin fin and the normal of the endwall. The averaged Nusselt number of the oblique pin fins for "single row" arrangement is smaller than that of the perpendicular pin fins, because the endwall heat transfer in the downstream of the pin fins is not enhanced. In the case of the "cross row" arrangement of -30≨θ≨+30, the heat transfer shows the almost same value at the perpendicular pin fins. The "cross row" arrangement of θ=±30 degrees shows about 25% less pressure loss than that of the perpendicular pin fin in spite of almost the same averaged Nusselt number.
社団法人日本機械学会の論文
2000-09-25