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| 1 | Effect of Nonequilibrium Condensation of Moist Air on the Boundary Layer in a Supersonic Nozzle显示文摘When condensation occurs in supersonic flow fields, the flow is thected by the latent heat released. In the present study, Navier-Stokes equations were solved numerically using a 3rd-order MUSCL type TVD finitedifference scheme with a second-order fractionabetep for time integration. Baldwin-Lomax model, that is the algebraic model, called the zero equation model was used in the computations. The effects of initial conditions (initial degree of supersaturation and total temperature in the reservoir) on condensing fiow of moist air in a supersonic circular half nozzle were investigated. In this case, the effect of condensation on the boundary layer was also discussed in detail. As a result, the simulated flow fields were compared with experimental data in good agreement, and the velocity and temperature profiles were largely changed by condensation. | ShigeruMatsuo ShenYu | 1997 | Journal of Thermal Science1997，6，4： | 6 |
| 2 | 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 |
| 3 | 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 |
| 4 | 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 |
| 5 | Passive Control of Steady Condensation Shock Wave显示文摘When condensation occurs in supersonic flow fields, the flow is affected by the latent heat released, and if the heat released exceeds a certain quantity, a condensation shock wave will occur There are many papers for the passive control of shock-boundary layer interaction using the porous wall with a plenum underneath on the application of the technique to transonic airfoil flows. In the present study, this passive technique is applied to the control of a steady condensation shock wave generated in a supersonic nozzle. In order to clarify the effect of the passive shockboundary layer control on condensation shock, Navier-Stokes equations were solved numerically using a 3rd-order MUSCL type TVD finite-difference scheme with a second-order fractional-step for time integration. As a result, the simulated flow fields were compared with experimental data in good agreement and the aspect of the flow field has been clarified. | ShigeruMatsuo ShenYu 等 | 2000 | Journal of Thermal Science2000，9，4： | 1 |
| 6 | 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 |
| 7 | 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 |
| 8 | 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 |
| 9 | Study on the Characteristics of Supersonic Coanda Jet显示文摘Techniques using Coanda effect have been applied to the fiuid control devices. In this field, experimental studies were so far performed for the spiral jet obtained by the Coanda jet issuing from a conical cylinder with an annular slit, thrust vectoring of supersonic Coanda jets and so on. It is important from the viewpoints of effective applications to investigate the characteristics of the supersonic Coanda jet in detail. In the present study the effects of pressure ratios and nozzle configurations on the characteristics of the supersonic Coanda jet have been investigated experhoentally by a schlieren optical method and pressure measurements. Furthermore, Navier-Stokes equations were solved numerically using a 2nd-order TVD finite-volume scheme with a 3rd-rorder three stage Runge-Kutta method for time integration. k - ε model was used in the computations. The effects of initial conditions on Coandaflow were investigated numerically As a result, the simulated flow helds were compared with experimental data in good agreement qualitatively. | ShigeruMatsuo ShenYu 等 | 1998 | Journal of Thermal Science1998，7，3： | 0 |
| 10 | 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 |
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