Study on Annular Jets : (2nd Report, Experiments of Swirling Air Jets and Unswirled Air Jets Issuing from Annular Nozzle)
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概要
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In this paper are described the effects of the vane-angle β_0 and the nozzle inclination-angle α_0 and the annular slit ratio 2b_0/D on the velocity and static pressure distributions in swirling and unswirled air jets issuing from annular nozzle. The following characteristics were clarified from the experiments : the characteristics of swirling jets (2b_0/D<0.4) are mainly affected by β_0 and slightly by α_0 and 2b_0/D. In the case of β_0<60°, a region of subatmospheric pressure exists near the nozzle exit. Therefore, main stream lines of the jet are deflected toward the nozzle axis, and the main stream surface formed by these lines becomes asymptotically a cylindrical surface in far downstream region. The unswirled annular jets become circular ones at a short distance from the nozzle exit. The characteristics of the jet in the downstream region are similar to those of circular free jet.
- 一般社団法人日本機械学会の論文
著者
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Akagawa Koji
Faculty Of Engiineering Kobe University
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Taga Masao
Osaka Prefectural Technical College.
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Taga Masao
Osaka Prefectual Technical College
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SONOBE Yoshihiro
Asahi Chemical Industry Co., Ltd.
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YAMAJI Katsuhiro
Hitachi Shipbuilding & Engineering Co., Ltd.
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Yamaji Katsuhiro
Hitachi Shipbuilding & Engineering Co. Ltd.
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Sonobe Yoshihiro
Asahi Chemical Industry Co. Ltd.
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Akagawa Koji
Faculty Of Engineering University Of Kobe.
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