|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | Numerical Simulation of the Supersonic Flows in the Second Throat Ejector-Diffuser Systems显示文摘The supersonic ejector-diffuser system with a second throat was simulated using CFD. A fully implicit finite volume scheme was applied to solve the axisymmetric Navier-Stokes equations and a standard k-E turbulence model was used to close the governing equations. The flow field in the supersonic ejectordiffuser system was investigated by changing the ejector throat area ratio and the secondary mass flow ratio at a fixed operating pressure ratio of 10. A convergent-divergent nozzle with a design Mach number of 2.11 was selected to give the supersonic operation of the ejector-diffuser system. For the constant area mixing tube the secondary mass flow seemed not to significantly change the flow field in the ejector-diffuser systems. It was, however, found that the flow in the ejector-diffuser systems having the second throat is strongly dependent on the secondary mass flow. | HeuydongKim ToshiakiSetoguchi 等 | 1999 | Journal of Thermal Science1999，8，4： | 9 |
| 2 | Navier-Stokes Computstions of the Supersonic Ejector Diffuser System with a Second Throat显示文摘The supersonic ejector-diffuser system with a second throat was simulated using CFD. An explicit finite volumescheme was aPPlied to solve tWo-dimensional Navier-Stokes equations with standard k - E tulbulence model. Thevacuum Performance of the supersonic ejector-diffuser system was investigated by changing the ejector throat arearatio and the operating Pressure ratio. Two convergent-divergent nozzles with design Mach nUmber of 2. 11 and 3.41were selected to give the supersonic operahon of the ejector-diffoser system. The presence of a second throat stronglyaffected the shock wave sir’UctUI’e inside the 'dxing tube as well as the spreading of the under-expanded jetdischarging from the Primary nozzle. There were optimum values of the operating pressure ratio and ejector throatarea ratio for the vacuum performance of the system to maximize. | Heuy-DongKim ToshiakiSetoguchi 等 | 1999 | Journal of Thermal Science1999，8，2： | 3 |
| 3 | Effects of Blade Geometry on Performance of Wells Turbine for Wave Power Conversion显示文摘An optimum design of the turbine would need a clear understanding of the influence of blade geometry on a Wells turbine performance. Practically, it is difficult to suggest the optimum geometry for the Wells turbine due to the complex interrelation among important parameters, the solidity, hub-to-tip ratio, aspect ratio, blade sweep of rotor, and so on. In the present study, the effect of blade geometry with the hub-to-tip and aspect ratios of rotor on the turbine performance was investigated with a numerical technique. As a result, the optimum blade geometry is as follows: the hub-to-tip ratio is about 0.7, and the aspect ratio about 0.5 under other constant important parameters, NACA0020 blade with blade sweep ratio of 0.35, and solidity of about 0.67. Furthermore, the detailed flow patterns for blade geometry were also shown and discussed in this paper. | TaehoKim ToshiakiSetoguchi 等 | 2001 | Journal of Thermal Science2001，10，4： | 3 |
| 4 | A Study of the Gas Flow through a LNG Safety Valve显示文摘一个安全阀门工作在交通的 LNG 线内控制压力的上面的限制。如果在安全阀门嘴内的压力在插嘴的阀门表上超过预定价值, LNG 的过量通过在嘴出口和阀门表之间的差距排出。处于这种状况,对阀门表起作用的力量是 LNG 的分泌物产生的 gasdynamic 力量和在阀门表后面到春天支持的机械力量。通过差距的流动是很复杂的,包含旋涡,流动分离,和冲击波。这些在与噪音和颤动伴随的系统上不利地影响。现在的学习瞄准理解安全阀门的流动物理。一个计算工作用二维, axisymmetric,可压缩的海军司烧方程被执行模仿在嘴出口和阀门表之间的煤气的流动,并且与理论结果相比。在那里存在,这被发现了在在阀门表的戳系数突然地在增加的嘴出口和阀门表之间的距离。关键词可压缩的流动 - 安全阀门 - 戳系数 - 内部流动 - 流动窒息 CLC 数字 O | Heuy-DongKim Jun-HeeLee Kyung-Am Park ToshiakiSetoguchi ShigeruMatsuo | 2006 | Journal of Thermal Science2006，15，4： | 2 |
| 5 | Numerical Study for Hysteresis Phenomena of Shock Wave Reflection in Overexpanded Axisymmetric Supersonic Jet显示文摘当高压的气体对从超声的嘴的真空房间精疲力尽时, overexpanded 超声的喷气以特定的状况被形成。在二维的超声的喷气,而且,为流动地里的冲击波的思考类型的磁滞现象现象在伪稳定的流动下面并且例如被发生,这被知道,在常规思考( RR )和马赫思考(先生)之间的过渡压力比率被这现象影响。许多报纸为 underexpanded 描述了磁滞现象现象在 overexpanded axisymmetric 喷气下面的超声的喷气,而是这现象没在过去的报纸被详细说明。这研究的目的是用 TVD 方法在 overexpanded axisymmetric 喷气为冲击波的思考类型清除磁滞现象现象并且讨论磁滞现象现象的特征。 | Tsuyoshi Yasunobu Ken Matsuoka Hideo Kashimura ShigeruMatsuo ToshiakiSetoguchi | 2006 | Journal of Thermal Science2006，15，3： | 1 |
| 6 | Passive Control of Transonic Flow Fields with Shock Wave Using Non-equilibrium Condensation and Porous Wall显示文摘When non-equilibrium condensation occurs in a supersonic flow field.the flow is affected by the latent heat released.In the present study.in order to control the transonic flow field with shock wave,a condensing flow was produced by an expansion of moist air on a circular bump model and shock waves were occurred in the supersonic parts of the fields.Furthermore,the additional passive technique of shock /boundary layer interaction using the porous wall with a cavity underneath was adopted in this flow .The effects of these methods on the shock wave characteristics were investigated numerically and experimentally.The result obtained showed that the total pressure loss in the flow fields might be effectively reduced by the suitable combination between non-equilibrium condensation and the position of porous wall. | MasanoriTanaka Shigerumatsuo ToshiakiSetoguchi Kenjikaneko Heuy-DongKim ShenYu | 2003 | Journal of Thermal Science2003，12，2： | 1 |
| 7 | Effects of Hub-To-Tip Ratio and Tip Clearance on Hysteretic Characteristics of Wells Turbine for Wave Power Conversion显示文摘A Wells turbine for wave power conversion has hysteretic characteristics in a reciprocating flow. The hysteretic loop is opposite to the well-known dynamic stall of an airfoil. In this paper, the mechanism of the hysteretic behavior was elucidated by an unsteady 3-dimensional Navier-Stokes numerical simulation. It was found that the hysteretic behavior was associated with a streamwise vortical flow appearing near the blade suction surface. The effects of hub-to-tip ratio and tip clearance on the hysteretic characteristics of the Wells turbine have also been discussed in this paper. | Tae-HoKim YoichiKinoue ToshiakiSetoguchi KenjiKaneko | 2002 | Journal of Thermal Science2002，11，3： | 1 |
| 8 | Passive Control of an Impulsive Wave Using a Cavity/Helical Vane System显示文摘INTRODUCTIONUnsteadycompressiblegasflowthroughaductisoftenencoullteredinmanyengineeringapplicationsandhasbeeninvestigatedbymanyresearchers.Whenapressurewavegeneratedinsideaductisdischargedfromanopenendoftheduct.animpulsivewave,whichcanbefrequentlycha... | ToshiakiSetoguchi Heuy-DongKim 等 | 1999 | Journal of Thermal Science1999，8，1： | 1 |
| 9 | Effect of Nonequilibrium Homogenous Condensation on Flow Fields in a Supersonic Nozzle显示文摘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 a supersonic circular nozzle, and, by inserting a wedge-type shock generator placed in the supersonic part of the nozzle, the experimental investigations were carried out to clarify the effect of condensation on the normal shock wave and the boundary layer. As a result, the position of the shock wave relative to the condensation zone was discussed, together with the effect of condensation on pressure fiuctuations. Furthermore, a compressible viscous two-phase flow of moist air in a supersonic half nozzle was calculated to investigate the effect of condensation on boundary layer. | ToshiakiSetoguchi ShenYu 等 | 1997 | Journal of Thermal Science1997，6，2： | 1 |
| 10 | Experimental Study of Twin Pulse Jet Engines for Power Plant Application显示文摘The total efficiency of power plants depends on the energy conversion in a combustor and a turbine .Considerably higher energy transfer rates can be obtained from a pulsed combustion.but unsteady flow of a single jet combustor reduces the turbine efficiency.Therefore.two pulse combustors were set in parallel and connected to a settling chamber that supplies a flow with constant pressure to the turbine.The aim of investigations presented here is a demonstration of technical feasibility for industrial applications and to show the benefits obtained from the pulse combustors. | ToshihiroNakano Shigerumatsuo ToshiakiSetoguchi ShenYu | 2003 | Journal of Thermal Science2003，12，2： | 0 |
| 11 | Comparative Study of Turbines for Wave Energy Conversion显示文摘The objective of this paper is to compare the performances of the themes, which could be used for wave energy conversion in the near future, under various irregular wave conditions. The turbines included in the paper are as follows: (a) Wells turbine with guide vanes; (b) impulse turbine with self-pitch-controlled guide vanes; (c) impulse turbine with fixed guide vanes. In this study, experimental investigations were carried out to clarify the performances of the turbines under steady flow conditions, and then a numerical simulation was used for predicting the performances under irregular wave conditions with various significant wave heights. As a result it was found that the running and starting characteristics of the impulse turbines could be superior to those of the Wells turbine. | HideakiMaeda ToshiakiSetoguchi 等 | 2001 | Journal of Thermal Science2001，10，1： | 0 |
| 12 | Pressure Drop Control Using Multiple Orifice System in Compressible Pipe Flows显示文摘In order to investigate the effectiveness of an orifice system in producing pressure drops and the effect of compressibility on the pressure drop, computations using the mass-averaged implicit Navier-Stokes equations were applied to the axisymmetric pipe flows with the operating pressure ratio from 1.5 to 20.0. The standard k- ε turbulence model was employed to close the governing equations. Numerical calculations were carried out for some combinations of the multiple orifice configurations. The present CFD data showed that the orifice systems, which have been applied to incompressible flow regime to date, could not be used for the high operating pressure ratio flows. The orifice interval did not strongly affect the total pressure drop, but the orifice area ratio more than 2.5 led to relatively high pressure drops. The total pressure drop rapidly increased in the range of the operating pressure ratio from 1.5 to 4.0, but it nearly did not increase when the operating pressure ratio was over 4.0. In the compressible pipe flows through double and triple orifice systems, the total pressure drop was largely due to shock losses. | HeuydongKim ToshiakiSetoguchi 等 | 2001 | Journal of Thermal Science2001，10，4： | 0 |
| 13 | A Computational Investigation on the Control of Cavity-Induced Pressure Oscillations Using Sub-Cavity显示文摘计算调查被进行了决定 attenuating 的一种被动控制技术的有效性在限制二维的超声的流动的导致洞的压力摆动。被动控制技术被试穿二扁平的盘子在在洞入口的马赫数字 1.83 点在一个方形的洞的前面墙附近完成。结果证明扁平的盘子在洞的前面墙附近属于,阻止了广泛地被相信是洞回声的原因的反馈循环的形成。压力摆动的变细的结果的数量也依赖于用作摆动 suppressor 的扁平的板的长度。 | Md.Mahbubul Alam ShigeruMatsuo KenbuTeramoto ToshiakiSetoguchi Heuy-Dong Kim | 2006 | Journal of Thermal Science2006，15，3： | 0 |
| 14 | Effect of Exit Geometry of Tail Pipe on the Performance of Pulse Jet Engines显示文摘In this paper,the effect of geometries of tube open end on the shock,compression and expansion wavespropagating in the tube was investigated numerically and experimentally.One of them is a conventional straightshock tube with an open end.The other has a divergent tail tube at the exit.Applying a divergent tail tube(flaretube)to an open end shock tube,the period of one-cycle process could be shortened and the pressure behind theexpansion wave produced at the exit of the shock tube could be lowered much more below the atmosphericpressure than that produced in the straight tube.The results suggested that the intake air into the engine wassignificantly increased by applying a flare tube instead of a straight tube. | Toshihiro NAKANO ShigeruMATSUO KenbuTERAMOTO ToshiakiSETOGUCHI | 2006 | Journal of Thermal Science2006，15，3： | 0 |
| 15 | Numerical Simulation of a Negative Impulsive Wave显示文摘NumericalSimulationofaNegativeImpulsiveWaveToshiakiSETOGUCHI;ManabuTAKAO(DepartmentofMechanicalEngmeering,SagaUniversity,Honj... | ToshiakiSETOGUCHI ShenYU 等 | 1996 | Journal of Thermal Science1996，5，3： | 0 |
| 16 | Characteristics of Compression Wave Caused by Reflection of Expansion Wave at Open End of Tube显示文摘When an expansion wave propagated along a constant area straight tube reaches at the open end, the negative impulsive wave and the compression wave are formed by the emission and reflection of expansion wave. The negative impulsive wave is emitted toward the surrounding area and causes an impulsive noise like the sonic boom. The compression wave propagates in the tube toward the upstream and may cause the impulsive noise at the surrounding area of tube portal. With the advance of industrial engineering, it seems that the discharging of the expansion wave will become important problems. In this study, the experimental and numerical investigations are carried out using the shock tube and the TVD numerical method. The formation process of compression wave near the open end, the relationship with the compression wave and the expansion wave and the characteristics of compression wave are discussed. | TsuyoshiYasunobu ShigeruKuchii HideoKashimura ToshiakiSetoguchi | 2002 | Journal of Thermal Science2002，11，2： | 0 |
| 17 | Effect of Non-Equilibrium Condensation of Moist Air on Flow Field in Ludwieg Tube显示文摘The time-dependent behavior of non-equilibrium condensation of moist air through a Ludwieg tube with a diaphragm downstream is investigated by using a computational fluid dynamics work. The two-dimensional, compressible, Navier-Stokes equations, fully coupled with the condensate droplet growth equations, are numerically solved by a third-order MUSCL type TVD finite-difference scheme with a second-order fractional time step. Baldwin-Lomax turbulence model is employed to close the governing equations. The present computations represent the experimental flows well. The results obtained show that for an initial relative humidity over 40 %, the periodic excursions of the condensation shock occurs in the Ludwieg tube, and the frequency increases with the initial relative humidity. It is also found that total pressure loss due to non-equilibrium condensation in the Ludwieg tube should not be ignored even for a very low initial relative humidity. Furthermore, the variations of condensation properties are also | ShigeruMatsuo MasanoriTanaka ToshiakiSetoguchi | 2002 | Journal of Thermal Science2002，11，2： | 0 |
| 18 | Passive Control of Unsteady Condensation Shock Wave显示文摘A rapid expansion of moist air or steam in a supersonic nozzle gives rise to nonequilibrium condensation phenomena. Thereby, if the heat released by condensation of water vapour exceeds a certain quantity, the flow will become unstable and periodic flow oscillations of the unsteady condensation shock wave will occur. For the passive control of shock-boundary layer interaction using the porous wall with a plenum underneath, many papers have been presented on the application of the technique to transonic airfoil flows. In this paper, the passive technique is applied to three types of oscillations of the unsteady condensation shock wave generated in a supersonic nozzle in order to suppress the unsteady behavior As a result, the effects of number of slits and length of cavity on the aspect of flow field have been clarified numerically using a 3rd-order MUSCL type TVD finite-difference scheme with a second-order fractional-step for time integration. | ToshiakiSetoguchi ShenYu 等 | 2000 | Journal of Thermal Science2000，9，4： | 0 |
| 19 | Temperature Distribution on Inclined Plate Caused by Interaction withSupersonic Jet显示文摘The Phenomena of the interaction between a supersonic jet and an obstacle is a very interesting and important problem relating to the industrial engineering. This paper aims to investigate the characteristics of the two-dimensional temperature distribution on an inclined plate surface and the relation between the temperature distribution and some shock waves formed in the flow field. In this study, the measurement of temperature distribution on an inclined plate surface and the now visualization has carried out for various conditions using the thermo-sensitive liquid crystal sheet and the schlieren method. The two dimensional temperature distribution on the plate surface is clearly obtained by the thermo-sensitive liquid crystal sheet. The relation between the temperature distribution on an inclined plate surface and some shock waves reached at a plate surface is discussed. In this paper, the characteristics of the temperature distribution and the maximum temperature, and some other experimental evidences are presented. | TsuyoshiYasunobu ToshiakiSetoguchi 等 | 2000 | Journal of Thermal Science2000，9，4： | 0 |
您所在的机构暂未开通此部分的功能，请联系管理员