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A Blowdown Cryogenic Cavitation Tunnel and CFD Treatment for Flow Visualization around a Foil

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Journal of Thermal Science 2005年第4期14卷 346-351页

作者： Yutaka ITO Kazuya SAWASAKI Naoki TANI takao nagasaki Toshio NAGASHIMA Tokyo Institute of Technology G3-334259Nagatsuta-choMidori-kuYokohama226-8502Japan Honda Motor Co.Ltd. 2-1-1Minami-AoyamaMinato-kuTokyo107-8556Japan Japan Aerospace Exploration Agency 2-1-1SengenTsukuba305-8505Japan University of Tokyo 7-3-1HongoBunkyo-kuTokyo113-8656Japan

成穴是在火箭引擎的发展的主要问题之一。有很少试验性的研究设想低温实验法的陪衬成穴。因此， blowdown 类型的一条新低温实验法的成穴隧道被造。陪衬形状是鈥減l ano 凸的鈥吗？因为简洁，这侧面被选择，而且类似于为火箭 inducer im... 详细信息

成穴是在火箭引擎的发展的主要问题之一。有很少试验性的研究设想低温实验法的陪衬成穴。因此， blowdown 类型的一条新低温实验法的成穴隧道被造。陪衬形状是鈥減l ano 凸的鈥吗？因为简洁，这侧面被选择，而且类似于为火箭 inducer impeller 的。工作液体是在房间温度，热水和液体氮的水。在攻击(AOA )=8 掳的角度的情况下，期刊洞离开在 90 掳 C 和氮在两水的实验被观察在 ? 在一样的速度下面的 190 掳 C 10 m/sec 和一样的成穴数 0.7。频率被观察分别地，是 110 和 90 Hz 并且几乎旋涡从陪衬流与那些与一致。温度消沉特别在低温实验法的成穴在实验和模拟由于热力学的效果被证实。关键词成穴 - 隧道 - 致冷剂 - CFD - 可视化 - 模拟 - 陪衬 CLC 数字

关键词：低温气穴通道空气动力学 CFD 火箭工程

Numerical Simulation of Sub-cooled Cavitating Flow by Using Bubble Size Distribution

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Journal of Thermal Science 2003年第4期12卷 350-356页

作者： Yutaka ITO es.titech.ac.jp Hideki WAKAMATSU es.titech.ac.jp takao nagasaki es.titech.ac.jp Department of Energy Sciences Tokyo Institute of Technology 4259 Nagatsuta-cho Midori-ku Yokohama 226-8502 Japan E-mail: itoDepartment of Energy Sciences Tokyo Institute of Technology 4259 Nagatsuta-cho Midori-ku Yokohama 226-8502 Japan E-mail: itoDepartment of Energy Sciences Tokyo Institute of Technology 4259 Nagatsuta-cho Midori-ku Yokohama 226-8502 Japan E-mail: ito

A new cavitating model by using bubble size distribution based on mass of bubbles is proposed. Liquid phase is treated with Eulerian framework as a mixture containing minute cavitating bubbles. Vapor phase consists of various sizes of minute vapor bubbles, which is distributed to classes based on their mass. The change of bubble number density for each class was solved by considering the change of bubble mass due to phase change as well as generation of new bubbles due to heterogeneous nucleation. In this method the mass of bubbles is treated as an independent variable, in other word, a new coordinate, and dependant variables are solved in Eulerian framework for spatial coordinates and bubble-mass coordinate. The present method is applied to a cavitating flow in a convergent-divergent nozzle, and the two-phase flow with bubble size distribution and phase change was successfully predicted.

关键词：数值模拟气窝现象液氮气泡尺寸分布涡轮泵火箭燃料

ITTC COMPARATIVE TESTS ON PRESSURE FLUCTUATIONS

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Journal of Hydrodynamics 1989年第3期1卷 11-25页

作者： takao Sasajima Yoshitaka Ukon nagasaki Experimental Tank Mitsubishi Heavy Ind. Ltd. Nagasaki Japan Ship Propulsion Division Ship Research Institute Mitaka Japan

Pressure fluctuation induced by unsteady propeller cavitation is one of the most predominant vibration sources. Cavitation Committee of International Towing Tank Conference (ITTC) has been continuously reviewing the theoretical and experimental prediction methods. In this paper, the accuracy of the existing prediction methods and the parameters which affect the model test results are discussed, especial]y with referring to the results of the comparative tests on the 'Sydney Express' propeller, organized by Cavitation Committee.

关键词： Pro ITTC COMPARATIVE TESTS ON PRESSURE FLUCTUATIONS 几几 mode OO

Fulminant hepatic failure in a case of autoimmune hepatitis in hepatitis C during peg-interferon-alpha 2b plus ribavirin treatment

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World Journal of Gastroenterology 2007年第32期13卷 4394-4397页

作者： Takayuki Kogure Yoshiyuki Ueno Koji Fukushima Futoshi nagasaki Jun Inoue Eiji Kakazu Yasunori Matsuda Osamu Kido Yu Nakagome Osamu Kimura Noriyuki Obara Yuta Wakui takao Iwasaki Tooru Shimosegawa Division of Gastroenterology Tohoku University Graduate School of Medicine1-1 SeiryoAobakuSendai City 980-8574Japan

A 27-year-old Caucasian female with hepatitis C virus (HCV) infection treated with interferon (IFN) who developed severe autoimmune hepatitis (AIH) is described. The infecting viral strain was of genotype Ib and the pre-treatment HCV viral load was at a high level. The patient was treated with pegylated IFN-alpha 2b and ribavirin,and her HCV-RNA became negative at wk 12,but after that she developed fulminant hepatic failure. The patient recovered after steroid pulse therapy consisting of methylprednisolone 1000 mg/d for three days which was administered twice. A needle liver biopsy revealed the typical pathological findings of AIH.

关键词：自体免疫肝炎干扰素病毒唑肝炎病毒急性肝炎失效

Pegylated interferon plus ribavirin for genotype Ib chronic hepatitis C in Japan

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World Journal of Gastroenterology 2008年第47期14卷 7225-7230页

作者： Takayuki Kogure Yoshiyuki Ueno Koji Fukushima Futoshi nagasaki Yasuteru Kondo Jun Inoue Yasunori Matsuda Eiji Kakazu Takeshi Yamamoto Hiroyoshi Onodera Yutaka Miyazaki Hiromasa Okamoto Takehiro Akahane Tomoo Kobayashi Yutaka Mano takao Iwasaki Motoyasu Ishii Tooru Shimosegawa Division of Gastroenterology Tohoku University HospitalSendai 980-8574Japan Department of Gastroenterology Tohoku Rosai HospitalSendai 980-8574Japan Department of Gastroenterology Miyagi Cancer CenterNatori 981-1293Japan Department of Internal Medicine Tohoku Kosai HospitalSendai 980-0803Japan Department of Internal Medicine Shirakawa Kosei General HospitalShirakawa 961-0005Japan Department of Gastroenterology Ishinomaki Municipal HospitalIshinomaki 986-0835Japan Department of Gastroenterology Osaki Citizen HospitalFurukawa 989-6183Japan Department of Gastroenterology Sendai Medical CenterSendai 983-8520Japan Department of Internal Medicine Miyagi Social Insurance HospitalSendai 981-1103Japan

AIM:To evaluate the efficacy of pegylated interferon α-2b(peg-IFNα-2b) plus ribavirin(RBV) therapy in Japanese patients with chronic hepatitis C(CHC) genotype Ib and a high viral ***:One hundred and twenty CHC patients(58.3% male) who received peg-IFNα-2b plus RBV therapy for 48 wk were *** virological response(SVR) and clinical parameters were ***:One hundred(83.3%) of 120 patients completed 48 wk of treatment.53 patients(44.3%) achieved *** virological response(EVR) and end of treatment response(ETR) rates were 50% and 73.3%,*** clinical parameters(SVR vs non-SVR) associated with SVR,ALT(108.4 IU/L vs 74.5 IU/L,P = 0.063),EVR(76.4% vs 16.4%,P 56 years),SVR in females was significantly lower than that in males(17% vs 50%,P = 0.0262).EVR and adherence to Peg-IFN were demonstrated to be the main factors associated with ***:Peg-IFNα-2b plus RBV combination therapy demonstrated good tolerability in Japanese patients with CHC and resulted in a SVR rate of 44.3%.Treatment of elderly female patients is still challenging and maintenance of adherence to peg-IFNα-2b is important in improving the SVR rate.

关键词：慢性丙肝干扰素病毒唑症状