... 2022 31 05 2023 31 05 2023 26 06 2023 hot-wire anemometry calibration compressible flow real gas effects organic Rankine cycle (ORC) computational fluid dynamics (CFD) measurement techniques Hot-wire anemometry has been used as the main tool for turbulence research...

...Feng Sheng; Hua Chen; Xiao-cheng Zhu; Zhao-hui Du A 3D compressible flow model was presented in Part I of the paper to study the occurrence of weak rotating waves in vaneless diffusers of centrifugal compressors. In this paper, detailed results on the influences of flow and diffuser geometry...

...Hua Chen; Feng Shen; Xiao-Cheng Zhu; Zhao-Hui Du A three-dimensional compressible flow model is presented to study the occurrence of weak rotating waves in vaneless diffusers of centrifugal compressors. The diffuser considered has two parallel walls, and the undisturbed flow is assumed...

... hybridization makes further sense for compressible flow solvers, where, as the Mach number tends to zero at walls, excessive dissipation can occur. The hybrid strategy is used to predict flow over a rib roughened surface and a jet impinging on a convex surface. These cases are important for blade cooling...

... occurs when both stall and acoustic flutters happen at the same speed. It is also found that blade stiffening has no effect on aero-acoustic flutter. aerodynamics blades compressible flow elasticity fans turbomachinery In turbomachinery applications, flutter is usually associated with fan...

... compressible flow compressors confined flow Navier-Stokes equations 12 09 2010 20 10 2010 21 04 2011 21 04 2011 2011 American Society of Mechanical Engineers ...

... in that they (a) preserve the order of the space-discretization and (b) greatly reduce the error in estimating integral output. A coarse-grid CFD analysis of the compressible flow field in an annular duct for which an analytical solution is available yields a mass flow error of 62% or 2%, depending on whether the best...

... of research in aerodynamic shape design optimization. The goal of this work is to extend the adjoint method into turbomachinery design applications for viscous and compressible flow, and to further improve the aerodynamic performance. In the work, the minimization of the entropy generation rate with the mass...

... ) Ω angular velocity of rotating disk Subscripts c seal clearance e egress i ingress max maximum min minimum o superposed flow (or total value for compressible flow) 1,2 locations in wheel-space and annulus...

... be included in the publication of the experimental results. 23 07 2009 10 08 2009 12 11 2010 12 11 2010 compressible flow gas turbines orifices (mechanical) seals (stoppers) swirling flow In Part I of this two-part paper, the orifice equations were derived...

... impeller discharge flow, generates a larger unsteadiness toward the hub region of the vaned diffuser. 01 10 2008 25 11 2008 12 01 2010 12 01 2010 compressible flow compressors diffusion particle velocity analysis Future small gas turbines rely on higher efficiency...

... to predict the rotational heat transfer in the equilateral triangular channel. 29 08 2008 21 09 2008 09 07 2009 blades channel flow compressed air systems compressible flow cooling gas turbines Modern gas turbine blades operate at high temperatures to improve efficiency...

... into the low pressure compression domain but also the expected hysteresis pattern of the surge loop in terms of its mass flow versus pressure characteristic. 20 02 2007 22 02 2007 06 05 2008 compressible flow compressors elasticity flow instability flow visualisation machine testing...

... stability flow measurement compressible flow confined flow nozzles jets Experiments to determine the causes, precursors, and control mechanisms for stall and surge in a centrifugal compressor were conducted at the NASA Glenn Research Center over the past several years. The experimental work...

... for Micro-Electro-Mechanical Systems ,” Ph.D. thesis, Department of Mechanical Engineering, MIT. Another geometric nonuniformity which tends to arise during the micro-fabrication process is the tapering of the thrust-bearing orifices. The viscous, compressible flow through an orifice with variable...

... theory is presented to analyze the effects of compressibility in micro-flows (characterized by low Reynolds numbers and high Mach numbers) through hydrostatic thrust bearings for application to micro-turbomachines. The analytical model, which combines a one-dimensional compressible flow model with finite...

... and interaction noise. In order to reduce these drawbacks it is desirable to investigate the blade-row interaction at an early stage of the design phase. vortices boundary layer turbulence computational fluid dynamics compressors Runge-Kutta methods compressible flow wakes rotors stators...

... turbine profile. Finally, this study is a part of a wider research conducted at the VKI, including the influence of freestream turbulence level and passing wakes in compressible flow conditions, as in Coton et al. 17 . Hatman and Wang 12 described the physical development and the main features...

... June 2003 01 Dec 2002 01 Mar 2003 15 06 2004 computational fluid dynamics gas mixtures compressible flow Navier-Stokes equations computational complexity In recent years, turbomachinery industry has continued to take more and more advantage of the capabilities...

... compressors confined flow computational fluid dynamics Mach number subsonic flow compressible flow gas turbines The blade sections of industrial axial flow compressors require a wider range from surge to choke than typical gas turbine compressors in order to meet the high-volume flow-range...