年間 18 号発行
ISSN 印刷: 1064-2285
ISSN オンライン: 2162-6561
Indexed in
EXPERIMENTAL AND NUMERICAL INVESTIGATION OF THE EFFECTIVENESS OF IMPINGEMENT–FILM HYBRID COOLING
要約
This paper reports on an experimental and numerical study of an impingement-film hybrid cooling technique. The effects of four important parameters on cooling effectiveness are discussed, including density flow ratio (DFR), length of inducting slab, jet-to-slab spacing, and axial location of jets. The temperatures of hot gas and coolant were 430 K and 300 K, respectively. The results show that the cooling effectiveness can be increased either by increasing the DFR or by increasing the length of the inducting slab. In the range of DFR higher than 2, reducing the jet-to-slab spacing will improve the cooling effectiveness significantly. The axial location of jets has little influence on cooling effectiveness in the present work.
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