... anemometry in compressible flows can be found in Refs. [ 6 – 8 ] or in Ref. [ 14 ]; the present section is, however, useful to explain the present calibration approach and the employed analytical expressions used in following sections. In general, the convective heat transfer from a long, heated cylinder...

...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. 19 08 2009 28 10 2009 27 04 2011 27 04 2011 aerodynamics blades compressible flow elasticity fans turbomachinery...

... 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...

... also apply to a radial-clearance seal if V r , e were replaced by V z , e ). It can be seen from Eq. 8 that, apart from p 2 , the variable quantities are based on the upstream conditions in the source. Although compressible flow occurs in the external...

... with the available experimental data, but there are insufficient published data to validate the theory for combined ingress. 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...

... impeller discharge flow, generates a larger unsteadiness toward the hub region of the vaned diffuser. Nominal loading, hub plane, flow angle α ° 01 10 2008 25 11 2008 12 01 2010 12 01 2010 compressible flow compressors diffusion particle velocity analysis...

... 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 Internal gas turbine blade cooling passage Based on the data available...

... 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...

.... In order to model the compressible, viscous flow through an orifice with variable 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...

... 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. In order to reduce these drawbacks it is desirable to investigate the blade-row interaction...

... wakes in compressible flow conditions, as in Coton et al. 17 . Hatman and Wang 12 described the physical development and the main features of the transition for different bubble types. Their results showed that the bubble characteristics are well correlated by the value of some parameters...

... behavior, both at design conditions and in off-design, providing the designer with many useful details about the flow structure. computational fluid dynamics gas mixtures compressible flow Navier-Stokes equations computational complexity 2004 ASME ...

... 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...