ターボファンの内部流れおよびケーシング形状が性能と騒音に及ぼす影響

山崎 進, 小松 茂三郎, 小幡 俊光, 横山 寿人

doi:10.1299/kikaib.65.2770

ターボファンの内部流れおよびケーシング形状が性能と騒音に及ぼす影響

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書誌事項

タイトル別名

Investigation of Flow Pattern in a Backward-Curved Fan and Influence of Its Fan Shape on the Performance and Noise.
ターボファンノナイブナガレオヨビケーシングケイジョウガセイノウトソウオンニオヨボスエイキョウ

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説明

In this paper the velocity and pressure distributions within the casing and influence of its fan shape on the performance and noise of backward-curved fan are studied. It is shown that the meridian velocity of C_m1 at the inlet of the impeller increase with increasing b₂. Incline angle δ₁ has a tendency to increase with increasing b₂. The meridian velocity of C_m2 at the outlet has a tendency to uniform in the axial direction and peripheral direction, and velocity ratio C_m2/U₂ is 0.4∼0.7. The discharge angle of α₂ at the outlet of the impeller is 15∼18 degree. The influence of the inclination of shraud and overlap of rear ede of suction-cone is large.