Masami Ochiai
Hitachi Construction Machinery
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Publication
Featured researches published by Masami Ochiai.
International journal of fluid power | 2007
Xin Fu; Xuewen Du; Jun Zou; Hong Ji; Shohei Ryu; Masami Ochiai
Abstract This paper presents predictions and measurements of the structures of cavitation flow inside the throttling valve. The three-dimensional Navier-Stokes equations in a moving reference frame are solved on tetrahedral meshes. A sliding mesh technique is utilized to characterize unsteady interactions. The accuracy of the predicted flow fields is evaluated by comparison to measurement results taken with a high-speed camera. Results show that the pressure distribution inside the throttling groove is sensitive to the valve port configuration and flow direction. Bubbles form near the side wall of the groove on the throttling edge where, in the case of flow into the throttling groove, the pressure is at a minimum. With the increase of the pressure gradient bubbles saturate the flow. Noise spectrum analysis indicates that the noise level induced by cavitation is determined by the number and size of the bubbles passing through the valve grooves.
Archive | 1997
Yasuo Tanaka; Masami Ochiai; Takashi Yagyu; Akira Hashimoto; Yoshinori Furuno; Yutaka Watanabe; Yukihiko Sugiyama
Archive | 1988
Ken Ichiryu; Takashi Kanai; Masami Ochiai; Yuusaku Nozawa; Hideyo Kato
Archive | 2001
Eiji Egawa; Hirotsugu Kasuya; Toru Kurenuma; Masami Ochiai; Shuji Ohira; Seiji Yamashita; 修司 大平; 誠二 山下; 榑沼 透; 栄治 江川; 博嗣 糟谷; 正巳 落合
Proceedings of the JFPS International Symposium on Fluid Power | 2008
Masami Ochiai; Shohei Ryu
Archive | 2001
Eiji Egawa; Hirotsugu Kasuya; Toru Kurenuma; Masami Ochiai; Shuji Ohira; Shiyouhei Riyuu; Junji Tsumura; Seiji Yamashita; 小平 劉; 修司 大平; 誠二 山下; 榑沼 透; 栄治 江川; 淳二 津村; 博嗣 糟谷; 正巳 落合
Archive | 1988
Ken Ichiryu; Takashi Kanai; Masami Ochiai; Nobuhiko Ichiki
Archive | 2003
Eiji Egawa; Masami Ochiai; Mitsuo Sonoda; Seiji Yamashita; 光夫 園田; 誠二 山下; 栄治 江川; 正巳 落合
Archive | 2000
Tsutomu Udagawa; Teruo Igarashi; Masami Ochiai; Toshimi Sakai; Kazuhisa Ishida; Kouji Funato
Archive | 2005
Kazuo Takiguchi; Masami Ochiai; Tsutomu Udagawa; Katsumi Ueno; Takashi Yagyu; Yukihiko Sugiyama; Mitsuo Aihara