Showing papers by "Hideo Nakamura published in 2004"
TL;DR: The studies indicate that subchronic ingestion of GTE or GSE may alter the pharmacokinetics of MDZ, and the effects ofGTE on CYP3A activity appear opposite between liver and small intestine, which could not be predicted from in vitro experiments.
81 citations
TL;DR: In this article, a double reducer (two-step contraction) nozzle with a high-contraction ratio of 10 was proposed for the liquid lithium flow target of International Fusion Materials Irradiation Facility (IFMIF).
20 citations
TL;DR: In this paper, a water jet experiment simulating Li flow validated stable flow up to 20 m/s with a double reducer nozzle, and a small Li loop experiment validated stable Li flow with up to 14m/s.
13 citations
TL;DR: In this paper, Li flow was tested in a free surface test channel under pressurized or evacuated condition for the IFMIF target, and the shape was found to agree well with the theoretical prediction, and it was indicated that the wakes emerge from the corners will not disturb the presently designed beam region.
13 citations
TL;DR: In this article, the authors investigated the instabilities on a high-speed liquid jet, induced by amplification of perturbations in the initially-laminar shear layer underneath the free surface (internal-shear mode instabilities), theoretically and experimentally.
Abstract: The instabilities on a high-speed liquid jet, induced by amplification of perturbations in the initially-laminar shear layer underneath the free surface (internal-shear mode instabilities), are investigated theoretically and experimentally. Part I of the present paper describes the characteristics of temporally and spatially unstable modes predicted by a linear perturbation equation where the shear layer velocity profile is represented by a single straight line. The analysis focuses on simulated liquid-metal beam target flow conditions characterized by high Froude numbers Fr Δ and moderate Weber numbers We Δ, both based on the velocity difference and the thickness of the shear layer. Temporally and spatially unstable modes are predicted for We Δ >1.8, for a certain range of wave number. For these spatiotemporal modes, the temporal growth rate tends to decrease with an increase in the spatial growth rate. The instabilities predicted by the present theory are all convective, and not absolute, for We Δ rangi...
9 citations
TL;DR: In this article, the wave generation on high-speed liquid jets, induced by the instabilities of a laminar shear layer underneath the free surface (the internal-shear mode instabilities), is investigated theoretically and experimentally.
Abstract: The wave generation on high-speed liquid jets, induced by the instabilities of a laminar shear layer underneath the free surface (the internal-shear mode instabilities), are investigated theoretically and experimentally Part II analyzes the jet curvature effect on the velocity profile and the surface configuration near the nozzle exit The initial characteristics of the free-surface shear layer and the relaxation of the shear layer with the distance from the nozzle exit are also analyzed Based on these results, the stability of the shear layer is analyzed for curved jet geometries simulating high-energy beam targets The analytical results show that the gravity and the jet curvature have little effect on the stability of the shear layer, and that the shear layer stabilizes quickly with its relaxation The predicted most-unstable wave numbers are in fair agreement with available experimental data for curved jets of both water and Li This indicates that the internal-shear mode instabilities are responsib
4 citations
Patent•
16 Dec 2004
TL;DR: In this article, a measurement device consisting of a sensor output receiving part arranged in the gas and liquid two-phase flow and receiving an output signal from a sensor detecting a gas phase and a liquid phase in the Gas and Liquid Two-Phase Flow (GL2P) is presented.
Abstract: PROBLEM TO BE SOLVED: To provide a measurement device for resolving an interface minute structure and a transport mechanism of complicated gas and liquid two-phase flow. SOLUTION: The measurement device comprises a sensor output receiving part arranged in the gas and liquid two-phase flow and receiving an output signal from a sensor detecting a gas phase and a liquid phase in the gas and liquid two-phase flow, and a measurement calculation part for calculating physical characteristics concerning an interface between the gas phase and the liquid layer in the gas and liquid two-phase flow on the basis of the output signals received by the sensor output receiving part. The measurement calculation part sets three sensor sets comprising six sensors and four sensors. The sensor output receiving part receives the output signals from each sensor. The measurement calculation part calculates a three-dimensional speed of the interface on the basis of the output signal from each sensor. COPYRIGHT: (C)2006,JPO&NCIPI
2 citations