1926 円錐オリフィス噴流の流動・伝熱制御(S21-5 噴流,後流及びはく離流れの流動解析と応用(5),21世紀地球環境革命の機械工学:人・マイクロナノ・エネルギー・環境)

概要

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An orifice impinging jet improves the heat transfer characteristics on an impingement plate due to the vena contracta, but it has the high flow resistance. In order to reduce the flow resistance as well as maintain better heat transfer performance, we suggested a cone orifice nozzle. Effects of the cone angle α on the cone orifice free jet flow and heat transfer characteristics of the impinging jet are examined. The results were demonstrated that the suggested cone orifice nozzle with α=15° enhanced the heat characteristics greater than the common orifice nozzle at Re=1.5×10^4. Under the same operation power, the cone orifice jet of α=15° had better heat transfer performance than the pipe jet in the region near the stagnation point as well as the common orifice jet.
社団法人日本機械学会の論文
2008-08-02