Development of Cross Flow Fan with Partial Inner Guide Blade

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  • 内部案内羽根を部分設置したクロスフローファンの開発
  • ナイブ アンナイ ハネ オ ブブン セッチシタ クロス フロー ファン ノ カイハツ

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Abstract

Cross flow fan invented by Mortier (1892) had a guide apparatus inside the impeller. After this however attention has been directed to a fan without a guide apparatus. It is attractive that inner guide apparatus can give higher values of total pressure and higher efficiency than the fan without inner apparatus. However the higher values of total pressure are restricted in narrow range of flow rate. Κορο_??_κ_??_ et al. obtained higher pressure coefficient ψt=6 at flow rate coefficientφ=1.5. Furthermore they investigated inner flow around the inner guide apparatus. In this paper two types of cross flow fan with partial inner guide blade are developed. The shape and the settling position of a guide blade are varied, while two types of tongue are used. Partial inner guide blade is shown to give higher performance inner wide range of flow rate.

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