...-universite.fr Email: camille.matar@etu.sorbonne-universite.fr Email: xavier.gloerfelt@ensam.eu 24 11 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...

...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...

...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...

... 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...

... to allow representation of the end-wall boundary layers. The computations are based on a 3D, time-accurate, viscous, finite-volume compressible flow solver ( 12 ). The unsteady flow cases are computed as Reynolds-averaged Navier-Stokes (RANS), with the basic assumption that the frequencies of interest...

... 10 2010 21 04 2011 21 04 2011 compressible flow compressors confined flow Navier-Stokes equations rotating stall surge fan speed stall hysteresis stall inception stall recovery Recipient of the IGTI Technical Committee Best Paper Award for 2010. Rotating...

... 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...

... compressible flow confined flow gas turbines orifices (mechanical) swirling flow Even when the external flow is axisymmetric, so that there is no circumferential variation in external pressure, ingress can still occur. The reason for this is that the rotating fluid in the wheel-space creates...

.... A. , and Johnson , B. V. , 1987 , “ Disk Pumping Test, Final Report ,” Air Force Wright Aeronautical Laboratories Report No. AFWAL-TR-87- 2050. 23 07 2009 10 08 2009 12 11 2010 12 11 2010 compressible flow gas turbines orifices (mechanical) seals (stoppers) swirling flow...

.... compressible flow compressors diffusion particle velocity analysis 01 10 2008 25 11 2008 12 01 2010 12 01 2010 2010 American Society of Mechanical Engineers ...

... 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...

... 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...

... cross-sectional area A , a one-dimensional compressible flow with friction, heat addition, and area change is employed ( 9 10 ). Assuming the flow through the orifices to be isothermal, the fractional change in static temperature can be expressed as 24 d T T = ( γ − 1 ) M...

... vortices boundary layer turbulence computational fluid dynamics compressors Runge-Kutta methods compressible flow wakes rotors stators Blade-row interaction in turbomachinery is important because it generates unsteady forces on the blades and causes blade fatigue and interaction noise...

... 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...

... compressible flow Navier-Stokes equations computational complexity In recent years, turbomachinery industry has continued to take more and more advantage of the capabilities of computational fluid dynamic (CFD) techniques in everyday activities. The aerodynamic analysis of components by means...

... 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...