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Keywords: compressible flow
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Journal Articles
Article Type: Research Papers
J. Turbomach. July 2012, 134(4): 041011.
Published Online: July 21, 2011
...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...
Journal Articles
Article Type: Research Papers
J. Turbomach. July 2012, 134(4): 041010.
Published Online: July 21, 2011
...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...
Journal Articles
Article Type: Research Papers
J. Turbomach. March 2012, 134(2): 021023.
Published Online: July 7, 2011
... 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...
Journal Articles
Article Type: Research Papers
J. Turbomach. October 2011, 133(4): 041029.
Published Online: April 27, 2011
... 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...
Journal Articles
Article Type: Research Papers
J. Turbomach. October 2011, 133(4): 041013.
Published Online: April 21, 2011
... 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...
Journal Articles
Article Type: Research Papers
J. Turbomach. October 2011, 133(4): 041010.
Published Online: April 20, 2011
... 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...
Journal Articles
Article Type: Research Papers
J. Turbomach. July 2011, 133(3): 031014.
Published Online: November 16, 2010
... 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...
Journal Articles
Article Type: Research Papers
J. Turbomach. July 2011, 133(3): 031005.
Published Online: November 12, 2010
... 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...
Journal Articles
Article Type: Research Papers
J. Turbomach. July 2011, 133(3): 031006.
Published Online: November 12, 2010
... 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...
Journal Articles
Article Type: Research Papers
J. Turbomach. April 2010, 132(2): 021010.
Published Online: January 12, 2010
... 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...
Journal Articles
Article Type: Research Papers
J. Turbomach. October 2009, 131(4): 041017.
Published Online: July 9, 2009
... 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...
Journal Articles
Article Type: Research Papers
J. Turbomach. July 2008, 130(3): 031017.
Published Online: May 6, 2008
... 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...
Journal Articles
Article Type: Technical Papers
J. Turbomach. January 2005, 127(1): 107–117.
Published Online: February 9, 2005
... 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...
Journal Articles
Article Type: Technical Papers
J. Turbomach. October 2006, 128(4): 597–605.
Published Online: February 1, 2005
... 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...
Journal Articles
Article Type: Technical Papers
J. Turbomach. October 2006, 128(4): 606–615.
Published Online: February 1, 2005
.... 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...
Journal Articles
Article Type: Technical Papers
J. Turbomach. October 2004, 126(4): 464–472.
Published Online: December 29, 2004
... 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...
Journal Articles
Article Type: Technical Papers
J. Turbomach. July 2004, 126(3): 406–413.
Published Online: September 3, 2004
... 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...
Journal Articles
Article Type: Technical Papers
J. Turbomach. April 2004, 126(2): 268–276.
Published Online: June 15, 2004
... 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 ...
Journal Articles
Article Type: Technical Papers
J. Turbomach. April 2004, 126(2): 323–331.
Published Online: June 15, 2004
... 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...
Journal Articles
Article Type: Technical Papers
J. Turbomach. January 2004, 126(1): 24–34.
Published Online: March 26, 2004
... revision March 2003. Paper No. 2003-GT-38863. Review Chair: H. R. Simmons. 16 June 2003 01 December 2002 01 March 2003 26 03 2004 flow control compressors closed loop systems stators compressible flow aerodynamics flow separation pressure measurement In recent...