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| 1 | Optimization Study of a Coanda Ejector显示文摘Coanda 效果长在太空应用程序被采用了改进各种各样的设备的表演。这效果是流动的能力没有分离,跟随一个弄弯的轮廓并且很好在液体的一口高速度喷气在驱逐者身体从一张嘴出现,跟随弄弯的表面并且拖进驱逐者的第二等的流动的驱逐者被利用了。在 Coanda 驱逐者,第二等的流动由于主要流动动量在驱逐者被拖。到第二等的流动的从主要流动的动量的转移通过狂暴的混合发生并且粘滞效果。第二等的流动然后被拖由狂暴砍当被大狂暴的紧张的坚持在整个驱逐者与主要流动混合时,驱逐者强迫。一个 Coanda 驱逐者的表演主要基于它多好拖第二等的流动和在驱逐者出口在二流动之间混合的数量被学习。现在的学习的目的是在 Coanda 驱逐者表演上调查各种各样的几何参数和压力比率的影响。各种各样的因素的效果,例如,系统性能上的压力比率,主要的嘴和驱逐者配置基于在其它地方定义的一个性能参数被评估了。Coanda 驱逐者的表演强烈取决于主要的嘴配置和压力比率。当它决定第二等的集体流动率的比率到主要集体流动率和混合长度,混合的层生长在优化 Coanda 驱逐者的表演起一个主要作用。关键词 Coanda 驱逐者 - 可压缩的混合层 - 拖的流动 - 混合长度 - 导致的流动 CLC 数字 | H.D.Kim G.Rajesh T.Setoguchi S.Matsuo | 2006 | Journal of Thermal Science2006，15，4： | 6 |
| 2 | Computational Analysis of a Variable Ejector Flow显示文摘现在的学习探讨能改进驱逐者效率并且在固定操作压力比率下面控制再通行比率的一个可变驱逐者。可变驱逐者是一台设备由改变驱逐者喉咙区域比率在给定的操作压力比率下面获得特定的再通行比率。数字模拟被执行在可变驱逐者内提供流动特征的理解。声音、超声的嘴在驱逐者系统,和活动的锥柱体作为主要的开车的嘴被采用,插入了到一个常规驱逐者弥漫的系统,被用来改变驱逐者喉咙区域比率。数字模拟基于可压缩的、平均 Reynolds 的海军司烧方程的一个充分含蓄的有限体积计划。结果证明可变驱逐者能在固定操作压力比率控制再通行比率。关键词可变驱逐者 - 驱逐者喉咙区域比率 - 再通行比率 CLC 数字 | H.D. KIM J.H. LEE T. SETOGUCHI S.MATSUO | 2006 | Journal of Thermal Science2006，15，2： | 5 |
| 3 | Compressible flow characteristics around a biconvex arc airfoil in a channel显示文摘Shock wave-boundary layer interactions(SWBLI)are observed in several practical high-speed internal flows,such as compressor blades,turbine cascades,nozzles and so on.Shock induced oscillations(SIO),aerodynamic instabilities so-called buffet flows,flutter,aeroacoustic noise and vibration are the detrimental consequences of this unsteady shockboundary layer interactions.In the present study,a numerical computation has been performed to investigate the compressible flow characteristics around a 12%thick biconvex circular arc airfoil in a two dimensional channel.Reynolds averaged Navier-Stokes equations with two equation k-ωshear stress transport(SST)turbulence model have been applied for the computational analysis.The flow field characteristics has been studied from pressure ratio(ratio of back pressure,pb to inlet total pressure,p01)of 0.75 to 0.65.The present computational results have been compared and validated with the available experimental data.The results showed that the internal flow field characteristics such as shock wave structure,its behavior(steady or unsteady)and the corresponding boundary layer interaction are varied with pressure ratio.Self-excited shock oscillation was observed at certain flow conditions.Moreover,the mode of unsteady shock oscillation and its frequency are varied significantly with change of pressure ratio. | Md.Abdul Hamid A.B.M.Toufique Hasan S.M.Alimuzzaman S.Matsuo T.Setoguchi | 2014 | Propulsion and Power Research2014，3，1： | 2 |
| 4 | Nozzle geometry variations on the discharge coefficient显示文摘Numerical works have been conducted to investigate the effect of nozzle geometries on the discharge coefficient.Several contoured converging nozzles with finite radius of curvatures,conically converging nozzles and conical divergent orifices have been employed in this investigation.Each nozzle and orifice has a nominal exit diameter of 12.7x10^(-3)m.A 3rd order MUSCL finite volume method of ANSYS Fluent 13.0 was used to solve the Reynolds-averaged Navier-Stokes equations in simulating turbulent flows through various nozzle inlet geometries.The numerical model was validated through comparison between the numerical results and experimental data.The results obtained show that the nozzle geometry has pronounced effect on the sonic lines and discharge coefficients.The coefficient of discharge was found differ from unity due to the non-uniformity of flow parameters at the nozzle exit and the presence of boundary layer as well. | M.M.A.Alam T.Setoguchi S.Matsuo H.D.Kim | 2016 | Propulsion and Power Research2016，5，1： | 1 |
| 5 | A Study of the Critical Nozzle for Flow Rate Measurement of High-Pressure Hydrogen Gas显示文摘用一张批评的嘴的集体流动率测量显示出 inviscid 理论的有效性,显示当雷纳兹数字在理想的煤气的法律下面增加,分泌物系数增加并且来临统一。然而,当批评的嘴测量集体流动时,在一个压力象氢那样的真实气体评价百锁,分泌物系数超过统一,和真实气体效果应该被考虑。现在的学习瞄准用 high-pressured 氢气体调查批评的嘴的流动特征。axisymmetric,可压缩的海军司烧计算被采用模仿批评的嘴流动,和一个充分含蓄的有限的卷方法习惯于 discretize 管理方程系统。真实煤气的效果被模仿考虑分子间的力量,它说明液化氢气体的可能性。计算结果与过去试验性的数据相比。为真实气体的分泌物的系数能在采用真实煤气的假设的统一下面适当地被改正,这被发现了。 | H.D.Kim J.H.Lee K.A.Park T.Setoguchi andong.ac.kr*****Department of Mechanical Engineering Saga University Honjo-machi Saga-shi Saga 840-8502 Japan S.Matsuo | 2007 | Journal of Thermal Science2007，16，1： | 0 |
| 6 | 丰田公司混合动力车用新款直列4缸1.8L ESTEC2ZR-FXE汽油机显示文摘第四代Prius车用的发动机沿用了第三代车用2ZR-FXE发动机的基本结构,并采用了各种改进措施来提高燃油效率。被称作ESTEC 2ZR-FXE的新发动机,在降低摩擦的同时,采用了各种提高燃油效率的技术来改善燃烧特性、减少爆燃、优化热管理。由于采用了这种注重细节的方法来提高燃油效率,使得ESTEC 2ZR-FXE发动机成为世界上首款最高热效率达到40%的汽油机。介绍此款发动机采用的提高燃油效率的技术。 | E.Ikeda Y.Ito H.Nishiura 陈佳(译) 朱炳全(校) | 2017 | 国外内燃机2017，49，2： | 0 |
| 7 | Characteristics of transonic moist air flows around butterfly valves with spontaneous condensation显示文摘Effects of spontaneous condensation of moist air on the shock wave dynamics around butterfly valves in transonic flows are investigated by experimental and numerical simulations.Two symmetric valve disk shapes namely-a flat rectangular plate and a mid-plane cross-section of a prototype butterfly valve have been studied in the present research.Results showed that in case with spontaneous condensation,the root mean square of pressure oscillation(induced by shock dynamics)is reduced significantly with those without condensation for both shapes of the valves.Moreover,local aerodynamic moments were reduced in case with condensation which is considered to be beneficial in torque requirement in case of on/off applications of valves as flow control devices.However,total pressure loss was increased with spontaneous condensation in both the valves.Furthermore,the disk shape of a prototype butterfly valve showed better aerodynamic performances compared to flat rectangular plate profile in respect of total pressure loss and vortex shedding frequency in the wake region. | A.B.M.Toufique Hasan S.Matsuo T.Setoguchib | 2015 | Propulsion and Power Research2015，4，2： | 0 |
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