| Experimental Study on Shock Wave Structures in Constant-area Passage of Cold Spray Nozzle |
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| 作者单位： | Dept.Mechanical Engineering Kagoshima University，1-21-40 Korimoto，Kagoshima，890-0065 Japan，Takagi Precision Dies Co.，Ltd.，2-4-1 Ishida-Minami，Minami-ku，Kitakyushu，Fukuoka，802-0836 Japan，Dept.Mechanical Systems and Environmental Engineering，The University of Kitakyushu，1-1 Hibikino，Wakamatsuku，Kitakyushu，Fukuoka，808-0135 Japan |
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| 摘 要： | Cold spray is a technique to make a coating on a wide variety of mechanical or electric parts by spraying solidparticles accelerated through a high-speed gas flow in a converging-diverging nozzle.In this study,pseudo-shockwaves in a modeled cold spray nozzle as well as high-speed gas jets are visualized by schlieren technique.Theschlieren photographs reveals the supersonic flow with shock train in the nozzle,Static pressure along the barrelwall is also measured.The location of the head of pseudo-shock wave and its pressure distribution along the noz-zle wall are analytically explained by using a formula of pseudo-shock wave.The analytical results show that thesupersonic flow accompanying shock wave in the nozzle should be treated as pseudo-shock wave instead of nor-mal shock wave.
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| 关 键 词： | 超音速气流 激波结构 射流 冷喷嘴 等截面出口 |
| 收稿时间： | 10 December 2006 |
Experimental study on shock wave structures in constant-area passage of cold spray nozzle |
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| Authors: | Hiroshi Katanoda Takeshi Matsuoka Kazuyasu Matsuo |
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| Affiliation: | (1) Dept. Mechanical Engineering, Kagoshima University, 1-21-40 Korimoto, Kagoshima 890-0065, Japan;(2) Takagi Precision Dies Co., Ltd., 2-4-1 Ishida-Minami, Minami-ku, Kitakyushu, Fukuoka 802-0836, Japan;(3) Dept. Mechanical Systems and Environmental Engineering, The University of Kitakyushu, 1-1 Hibikino, Wakamatsu-ku, Kitakyushu, Fukuoka 808-0135, Japan |
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| Abstract: | Cold spray is a technique to make a coating on a wide variety of mechanical or electric parts by spraying solid particles accelerated through a high-speed gas flow in a converging-diverging nozzle.In this study,pseudo-shock waves in a modeled cold spray nozzle as well as high-speed gas jets are visualized by schlieren technique.The schlieren photographs reveals the supersonic flow with shock train in the nozzle,Static pressure along the barrel wall is also measured.The location of the head of pseudo-shock wave and its pressure distribution along the noz- zle wall are analytically explained by using a formula of pseudo-shock wave.The analytical results show that the supersonic flow accompanying shock wave in the nozzle should be treated as pseudo-shock wave instead of nor- mal shock wave. |
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| Keywords: | Supersonic Flow Pseudo-Shock Wave Jet Flow Cold Spray |
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