摘要：An experimental investigation on the unsteady tip flow field of a transonic compressor rotor has been *** casing-mounted high frequency response pressure transducers were arranged along both the blade chord and the blade *** chord-wise ones were used to indicate both the ensemble averaged and time varying flow structure of the tip region of the rotor at different operating points under 95% design speed and 60% design *** pitch-wise circumferential transducers were mainly used to analyze the unsteadiness frequency of the tip leakage flow in the rotor frame at the near stall *** contours of casing wall pressure show that there were two clear low pressure regions in blade passages,one along the chord direction,caused by the leakage flow and the other along the tangential direction,maybe caused by the forward swept leading *** low pressure regions were originated from the leading edge and formed a scissor-like flow *** 95% design speed condition,the shock wave interacted with the low pressure region and made the flow field *** the mass flow reduced,the two low pressure regions gradually contracted to the leading edge and then a spike disturbance emerged.

摘要：This paper describes the study on aerodynamics design optimization of turbomachinery blading developed by the authors at the Institute of Engineering Thermophysics, Chinese Academy of Sciences, during the recent few years. The present paper describes the aspects mainly on how to use a rapid approach of profiling a 3D blading and of grid generation for computation, a fast and accurate viscous computation method and an appropriate optimization methodology_ including a blade parameterization algorithm to optimize tm-bomachinery blading aerodynamically. Any blade configuration can be expressed by three curves, they are the camber lines, the thickness distributions and the radial stacking line, and then the blade geometry can be easily parameterized by a number of parameters with three polynomials. A gradient-based parameterization analytical method and a response surface method were applied herein for blade optimization. It was found that the optimization process provides reliable design for turbomachinery with reasonable computing time.

摘要：When I listen to the symphony series of German maestro Ludwig Van Beethoven, I am often inspired by the power of spirit as

摘要：The present paper describes an optimization methodology for aerodynamic design of turbomachinery combined with a rapid 3D blade and grid generator （RAPID3DGRID）, a N.S. solver, a blade parameterization method （BPM）, a gradient-based parameterization-analyzing method （GPAM）, a response surface method （RSM） with zooming algorithm and a simple gradient method. By the use of blade parameterization method a transonic com- pressor rotor can be expressed by a set of polynomials, and then it enables us to transform coordinate-expressed blade data to parameter-expressed and then to reduce the number of parameters. With changing any one of the parameters and by applying grid generator and N.S. solver, we can obtain several groups of samples. Here only ten parameters were considered to search an optimized compressor rotor. As a result of optimization, the adiabatic efficiency was increased by 1.73%.

摘要：2019年8月6日是中国著名工程热物理学家陈乃兴先生逝世一周年的纪念日。从6个方面详细阐述了陈乃兴先生的主要学术成就和对科技发展的重要贡献。他一生献身祖国、献身科学研究的拼搏精神,将鼓舞大家砥砺奋进。

摘要：对一台螺旋管式熔盐-氦气换热器进行试验研究,并利用威尔逊法对试验数据进行处理,获得螺旋管式换热器用于熔盐-氦气对流传热的传热准则关系式。将关系式与经验公式对比分析,结果表明螺旋管式换热器在管程和壳程均能提高工质对流换热系数,同时为熔盐-氦气换热器的设计提供设计依据。

摘要：对以He-N_2混合气体为工质的闭式Brayton循环系统进行了优化分析,获得循环最高效率下系统各组成设备的性能参数。以此优化结果为目标,设计了轮机和换热器的初步方案。以纯氦气工质时轮机和换热器的成本为基准,利用设备成本与几何参数之间的近似关系,获得不同氦气摩尔分数下轮机和换热器的相对成本。通过Brayton循环中轮机与换热器的成本权重分配,得到不同氦气摩尔分数下Brayton循环的相对总成本。结果表明:当氦气摩尔分数为50%～60%时,存在一个相对总成本的最小值,与纯氦气时相比,其相对总成本降低了12%左右,这对于闭式Brayton循环系统工质的选择具有一定的指导意义。

摘要：本文采用一种分区算法求解二维Navier-Stokes方程，对叶轮机械多级叶片排内的非定常流场干涉进行数值模拟。在探讨分区计算对于复杂通道内流场和动静叶列非定常干涉作用数值计算的必要性和重要性之后，针对某蒸汽轮机跨音速叶片组进行了数值分析，得到了典型的动静叶间非定常干涉流动图谱、作用于叶片的非定常气动力及其频谱特征。计算结果表明。本文提出的计算方法是合理有效的，为今后进行大规模动静叶非定常气动计算和基于非定常数值模拟的工程设计提供了可靠的依据和有用的工具。

摘要：运用数值模拟研究进口干度对超临界二氧化碳压缩机气动性能的影响,着重对比分析了不同进口干度时叶顶间隙流动的形态特征。结果表明:随着进口干度减小,超临界二氧化碳压缩机的最高效率点对应的流量增大,效率峰值升高,压比增大,喘振裕度增大;在设计流量及小流量工况时,效率随进口干度的减小而降低;在大流量工况时,效率随进口干度的减小而升高;当叶顶间隙为进口叶高的5%时,在相同工况下,进口干度越小,叶顶泄漏流越强,易形成“二次泄漏”。

摘要：针对无短叶片、有长短叶片和短短叶片三种叶轮的离心泵,采用非定常CFD方法数值分析了设计工况点的整机全三维流场,讨论了不同叶片形式对水泵扬程、进出口压力波动及叶片表面和中央回转面内参数分布的影响。其中,与无短叶片情况相比较,详细分析了短叶片的有无和短叶片尺寸对泵内流场的影响;并对一个压力波动周期内,由于叶片和蜗舌相对位置不同内部流场的变化给出了相应的分析结果。从动力学角度对降低水泵的振动和噪声提供了有益的分析结果。