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Petrochemistry and Zircon U-Pb Geochronology of Felsic Xenoliths in Late Cenozoic Gem-Related Basalt from Bo Phloi Gem Field, Kanchanaburi, Western Thailand

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Journal of Earth Science 2021年第4期32卷 1035-1052页

作者： Alongkot Fanka Chidchanok Kasiban toshiaki Tsunogae Yukiyasu Tsutsumi Chakkaphan Sutthirat Department of Geology Faculty of ScienceChulalongkorn UniversityPathumwanBangkok 10330Thailand Graduate School of Life and Environmental Sciences University of TsukubaIbaraki 305-8572Japan Department of Geology University of JohannesburgAuckland Park 2006South Africa Department of Geology and Paleontology National Museum of Nature and ScienceIbaraki 305-0005Japan

The Cenozoic basalts exposed in Bo Phloi Gem Field,Kanchanaburi Province,western Thailand are a host to different gem materials(e.g.,sapphire,black spinel,black pyroxene and zircon)as well as other xenocrysts and xenoliths from the deep-seated formations onto the earth ***,only felsic xenoliths have never been investigated and reported in detail though they are in fact significant evidence of ancient tectonic processes of this *** this study,the felsic xenoliths were sampled and classified,on the basis of petrochemistry,into granite,syenogranite,and ***,they contain similar mineral assemblages including essentials of quartz,K-feldspar,and plagioclase with different proportions and accessories of biotite,zircon,and opaque ***,large phenocrysts of K-feldspar and plagioclase commonly present as a primary texture which are frequently corroded and replaced by‘sieved texture’with secondary cumulative fringe of tiny feldspar and *** secondary textures clearly indicate quenching after re-heating during transportation by basaltic *** analyses indicate that the alkaline and peraluminous magma show enrichment of Rb and depletion of Ba,Nb,Ta,Ti with steep slope of LREE/HREE enrichment *** evidences suggest low-degree partial melting of crustal materials related to the collisional S-type granite *** addition,U-Pb dating of zircon from a felsic xenolith yields 211.6±1.3 Ma comparable to the Late Triassic magmatism of the central belt granite in this region which is resulted from the collision between Sibumasu and Indochina terranes.

关键词： basalt granite sapphire tectonic Thailand xenolith

Effect of Nonequilibrium condensation of Moist Air on Transonic Flow Fields

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Journal of Thermal Science 2000年第1期9卷 37-44页

作者： Katsumi Shimamoto Shigeru Matsuo toshiaki Setoguchi Department of Mechanical Engineering Saga University l Honjo-machi Saga-shiSaga 840-8502 Japan

When condensation occurs in a supersonic flow field, the flow is affected by the latent heat released. In the present study, a condensing flow was produced by an expansion of moist air in nozzle with circular bump models and shock waves occurred in the supersonic parts of the flow fields. The experimental investigations were carried out to show the effects of initial conditions in the reservoir and nozzle geometries on the shock wave characteristics and the turbulences in the flow fields. Furthermore, in order to clarify the effect of condensation on the flow fields with shock waves, Navier-Stokes equations were solved numerically using a 3rd-order MUSCL type TVD finitedifference scheme with a second order fractional step for time integration. As a result the effect of condensation on the aspect of flow field has been clarified.

关键词： compressible flow condensation boundary layer control of shock wave moist air wavelet transform

Turbo-pump with Isolated Two Stage Impellers for Future Rocket Engine (Trial to Drive Impellers Independently)

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Journal of Thermal Science 2008年第1期17卷 28-34页

作者： toshiaki Kanemoto Makoto Shimojyo Ryunosuke Kawashima Daisuke Tanaka Akira Inagaki Shin Oba Kyushu Institute of Technology:Sensui 1-1 TobataKitakyushu 804-8550Japan Professor Kyushu Institute of Technology:Sensui 1-1 TobataKitakyushu 804-8550Japan DMW Corporation:Miyoshi 3-27 Mishima 411-8560Japan

To suppress the cavitation in the impellers and to make the turbo-pump lives longer, the inducer was separated from the main impeller and both impellers were driven independently. The performance of the pump and the flow conditions around the impellers were investigated experimentally and the following results were obtained. （1）The main impeller contributes to the flow interaction between the inducer and the main impeller. （2）The rotational speeds of both impellers can be controlled independently in order to suppress simultaneously the cavitation not only in the main impeller, but also in the inducer.

关键词： Turbo-pump Inducer Impeller Rocket Engine Cavitation NPSH

Flow Fields with Vortex in a Small Semi-open Axial Fan

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Journal of Thermal Science 2009年第4期18卷 294-300页

作者： Norimasa. Shiomi Yoichi Kinoue Ying zi Jin toshiaki Setoguchi Kenji Kaneko Department of Mechanical Engineering Saga University 1 Honjo-machi Saga 840-8502 Japan Institute of Mechatronics Zhejiang Sci-Tech University Xiasha Higher Educational Zone Hangzhou 310018 China

In order to clarify the effect of tip clearance （TC） size on fan performance and the flow field at rotor outlet in a small semi-open axial fan, the experimental investigation was carried out. The tip diameter of test fan rotor was 180mm and test TC sizes were lmm （TC=1mm） and 4mm （TC=4mm）. Fan characteristics tests were carried out for two cases of TC size and three-dimensional velocity fields at rotor outlet were measured using a single slant hot-wire probe at four flow-rate conditions. As a result, it was found that the pressure - flow-rate characteristics curves for two cases showed almost the same tendency. However, the ensemble averaged velocity profiles along radial measurement stations of TC-4mm largely changed compared with that of TC=1mm in cases of small flow-rate condition. From the phase-locked averaging results, it was also found that the vortex existed in the rotor outlet flow field of high flow-rate condition for each TC case. Compared with the vortices for TC=1mm and TC=4mm, the vortex for TC=4mm was stronger than that for TC=1mm.

关键词： fan semi-open type vortex tip clearance

Study for the Gas Flow through a Critical Nozzle

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Journal of Thermal Science 2003年第3期12卷 250-254,259页

作者： Jae-Hyung Kim Heuy-Dong Kim Shigeru Matsuo toshiaki Setoguchi School of Mechanical Engineering Andong National UniversityAndong 760-749 KoreaSchool of Mechanical Engineering Andong National UniversityAndong 760-749 KoreaDepartment of Mechanical Engineering Saga University1 Honjo Saga 840-8502 JapanDepartment of Mechanical Engineering Saga University1 Honjo Saga 840-8502 Japan

In the present study, computational work using the axisymmetric, compressible, Navier-Stokes equations is carried out to predict the discharge coefficient and critical pressure ratio of gas flow through a critical nozzle. The Reynolds number effects are investigated with several nozzles with different throat diameter. Diffuser angle is varied to investigate the effects on the discharge coefficient and critical pressure ratio. The computational results are compared with the previous experimental ones. It is known that the discharge coefficient and critical pressure ratio are given by functions of the Reynolds number and boundary layer integral properties. It is also found that diffuser angle affects the critical pressure ratio.

关键词： compressible flow choke boundary layer critical pressure ratio discharge coefficient

Impact of obesity on the surgical outcome following repeat hepatic resection in Japanese patients with recurrent hepatocellular carcinoma

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World Journal of Gastroenterology 2008年第10期14卷 1553-1558页

作者： Tohru utsunomiya Masahiro Okamoto Toshihumi Kameyama Ayumi Matsuyama Manabu Yamamoto Megumu Fujiwara Masaki Mori Shiomi Aimitsu Teruyoshi Ishida Department of Surgery Hiroshima Red Cross Hospital and Atomic Bomb Survivors Hospital Hiroshima Japan Department of Pathology Hiroshima RedCross Hospital and Atomic Bomb Survivors Hospital Hiroshima730-8619 Japan Department of Radiology Hiroshima Red CrossHospital and Atomic Bomb Survivors Hospital Hiroshima730-8619 Japan Department of Internal Medicine of the Liver Hiroshima Red Cross Hospital and Atomic Bomb SurvivorsHospital Hiroshima 730-8619 Japan

AIM: To evaluate the impact of obesity on the posto- perative outcome after hepatic resection in patients with hepatocellular carcinoma (HCC). METHODS: Data from 328 consecutive patients with primary HCC and 60 patients with recurrent HCC were studied. We compared the surgical outcomes between the non-obese group (body mass index: BMI < 25 kg/m2) and the obese group (BMI ≥ 25 kg/m2). RESULTS: Following curative hepatectomy in patients with primary HCC, the incidence of postoperative complications and the long-term prognosis in the non- obese group (n = 240) were comparable to those in the obese group (n = 88). Among patients with recurrent HCC, the incidence of postoperative complications after repeat hepatectomy was not significantly different between the non-obese group (n = 44) and the obese group (n = 16). However, patients in the obese group showed a significantly poorer long-term prognosis than those in the non-obese group (P < 0.05, five-yearsurvival rate; 51.9% and 92.0%, respectively). CONCLUSION: Obesity alone may not have an adverse effect on the surgical outcomes of patients with primary HCC. However, greater caution seems to be required when planning a repeat hepatectomy for obese patients with recurrent HCC.

关键词： Body mass index Hepatocellular carcinoma Hepatectomy Prognosis

Jet Screech Reduction with Perforated Flat Reflector

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Journal of Thermal Science 2008年第3期17卷 224-227页

作者： Md.Tawhidul Islam Khan Kenbu Teramoto Shigeru Matsuo toshiaki Setoguchi Department of Mechanical Engineering Saga University

In the present experimental study, investigations have been carded out to evaluate the performance of the new control technique of jet screech with different perforated flat reflectors. Mainly two types of porous flat reflectors had been used in the experiment. One reflector （reflector-V） designed for placing the reflector surface vertical to the jet axis, when, another type of reflector （reflector-H） designed for placing the reflecting surface horizontal to the jet axis. In both cases the reflectors had been placed at the nozzle （base tube with uniform cross-sectional area） exit. The diameter of the reflector-V was 15D when the diameter of the reflector-H was 10D. The porous area of the reflector-V was 6D and 4.5D for reflector-H where D indicated the diameter of the nozzle exit. The placement of the reflector at the exit of the nozzle reduces the sound pressure at the nozzle exit. Thus the muted sound can not excite the unstable disturbance at the nozzle exit and the loop of the feedback mechanism disappeared, finally, the generation of jet screech be cancelled. The suction space located at the back side of the porous surface of the reflector-V improves the efficiency of the screech control technique. However, in the case of reflector-H, the receptivity process of feedback loop had been controlled by reducing the disturbances at the effective shock fronts as well as at the nozzle exit. The performance of the proposed method was verified with a flat reflector concept and good performance in jet screech suppression has been confirmed in the case of porous reflector.

关键词： Supersonic jet noise screech tone feedback loop noise reduction porous reflector

Analysis of Aerodynamic Load on Straight-bladed Vertical Axis Wind Turbine

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Journal of Thermal Science 2014年第4期23卷 315-324页

作者： Qing’an LI Takao MAEDA Yasunari KAMADA Junsuke MURATA toshiaki KAWABATA Kazuma FURUKAWA Division of System Engineering Mie University1577 Kurimamachiya-choTsuMie 514-8507JAPAN Division of Mechanical Engineering Mie University1577 Kurimamachiya-choTsuMie 514-8507JAPAN

This paper presents a wind tunnel experiment for the evaluation of energy performance and aerodynamic forces acting on a small straight-bladed vertical axis wind turbine(VAWT) depending on several values of tip speed ratio. In the present study, the wind turbine is a four-bladed VAWT. The test airfoil of blade is symmetry airfoil(NACA0021) with 32 pressure ports used for the pressure measurements on blade surface. Based on the pressure distributions which are acted on the surface of rotor blade measured during rotation by multiport pressure-scanner mounted on a hub, the power, tangential force, lift and drag coefficients which are obtained by pressure distribution are discussed as a function of azimuthally position. And then, the loads which are applied to the entire wind turbine are compared with the experiment data of pressure distribution. As a result, it is clarified that aerodynamic forces take maximum value when the blade is moving to upstream side, and become small and smooth at downstream side. The power and torque coefficients which are based on the pressure distribution are larger than that by torque meter.

关键词： Wind Turbine Wind Energy Straight-bladed VAWT Tip Speed Ratio Pressure Distribution

A Study of the Impulse Wave Discharged from the Exits of Two Parallel Tubes

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Journal of Thermal Science 2003年第4期12卷 332-336,356页

作者： Yong-Hun Kweon Heuy-Dong Kim toshiaki Setoguchi Toshiyuki Aoki School of Mechanical Engineering Andong National University Andong 760-749 KoreaSchool of Mechanical Engineering Andong National University Andong 760-749 KoreaDepartment of Mechanical Engineering Saga University Honjo Saga 840-8502 JapanDepartment of Energy Science and Engineering Kyushu University Kasuga Fukuoka 816-8580 Japan

The twin impulse wave leads to very complicated flow fields, such as Mach stem, spherical waves, and vortex ring. The twin impulse wave discharged from the exits of the two tubes placed in parallel is investigated to understand the detailed flow physics associated with the twin impulse wave, compared with those in a single impulse wave. In the current study, the merging phenomena and propagation characteristics of the impulse waves are investigated using a shock tube experiment and by numerical computations. The Harten-Yee''s total variation diminishing (TVD) scheme is used to solve the unsteady two-dimensional compressible Euler equations. The Mach number Ms of incident shock wave is changed below 1.5 and the distance between two-parallel tubes, L/d, is changed from 1.2 to 4.0. In the shock tube experiment, the twin impulse waves are visualized by a Schlieren optical system for the purpose of validation of computational work. The results obtained show that on the symmetric axis between two-parallel tubes, the peak pressure produced by the twin impulse waves and its location strongly depend upon the distance between two-parallel tubes, L/d and the incident shock Mach number, Ms. The predicted Schlieren images represent the measured twin-impulse wave with a good accuracy.

关键词： compressible flow unsteady flow impulse wave shock wave shock tube.