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Keywords: swirling flow
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Journal Articles
Article Type: Research Papers
J. Turbomach. July 2022, 144(7): 071006.
Paper No: TURBO-21-1092
Published Online: February 25, 2022
... been investigated. The tangential jets can induce large-scale swirling flows and significantly enhance the connective heat transfer. The swirl multi-pass channel can be considered as an effective internal cooling strategy for the gas turbine blades. Transient liquid crystal thermography is used...
Journal Articles
Article Type: Research-Article
J. Turbomach. May 2014, 136(5): 051001.
Paper No: TURBO-12-1252
Published Online: September 27, 2013
... in staggered positions. These two impingement jets generated a swirling flow inside the plenum, which entered the film-cooling hole and maintained its angular momentum until exiting the film-cooling hole. The slant angle of the impingement jets was changed to α = 0 deg, 10 deg, 20 deg, and 30 deg in the wind...
Journal Articles
Article Type: Research Papers
J. Turbomach. July 2012, 134(4): 041018.
Published Online: July 25, 2011
... exhaust systems gas turbines Mach number swirling flow turbulence Diffusers are used in different technical applications for pressure recovery, i.e., for conversion of kinetic energy of fluid into static pressure at minimal loss. The flow in the diffuser is decelerated and therefore prone...
Journal Articles
Article Type: Research Papers
J. Turbomach. July 2012, 134(4): 041008.
Published Online: July 20, 2011
... engines gas turbines rotors swirling flow Paired swirl consists of two or more vortices rotating in opposite directions. If the paired vortices are symmetric (same magnitude and extent), then the pattern is called twin swirl. If one of the vortices dominates the other, resulting in an asymmetric...
Journal Articles
Article Type: Research Papers
J. Turbomach. May 2012, 134(3): 031013.
Published Online: July 15, 2011
... asymptote is quantified, and it is suggested how the orifice model could be used to extrapolate the effectiveness data obtained from an experimental rig to engine-operating conditions. 14 07 2010 22 07 2010 15 07 2011 15 07 2011 engines orifices (mechanical) swirling flow...
Journal Articles
Article Type: Research Papers
J. Turbomach. July 2011, 133(3): 031005.
Published Online: November 12, 2010
... ingress are significant, these cases are referred to as combined ingress. In Part I of this two-part paper, the so-called orifice equations are derived for compressible and incompressible swirling flows, and the incompressible equations are solved analytically for the RI ingress. The resulting algebraic...
Journal Articles
Article Type: Research Papers
J. Turbomach. July 2011, 133(3): 031006.
Published Online: November 12, 2010
...J. Michael Owen Ingress of hot gas through the rim seals of gas turbines can be modeled theoretically using the so-called orifice equations. In Part I of this two-part paper, the orifice equations were derived for compressible and incompressible swirling flows, and the incompressible equations were...
Journal Articles
Article Type: Research Papers
J. Turbomach. April 2011, 133(2): 021008.
Published Online: October 21, 2010
... 2009 21 10 2010 21 10 2010 aerodynamics aerospace engines cavitation computational fluid dynamics cooling jets stators swirling flow turbines The ingestion of hot gas in the stator-rotor gas turbine cavities has to be avoided in order to prevent or limit the overheating...
Journal Articles
Article Type: Research Papers
J. Turbomach. January 2011, 133(1): 011028.
Published Online: September 28, 2010
... number range between 50,000 and 500,000 with a characteristic swirl number of 0.7. It is observed that the flow field in the combustor is characterized by an expanding swirling flow, which impinges on the liner wall close to the inlet of the combustor. The impinging shear layer is responsible...
Journal Articles
Article Type: Research Papers
J. Turbomach. October 2007, 129(4): 694–704.
Published Online: August 19, 2006
.... 26 07 2006 19 08 2006 aerodynamics blades design engineering gas turbines jet engines swirling flow aerospace components Mach number flow separation However, as we know already from the experimental data, Fig. 8 center, the actual difference between BASE and ES...
Journal Articles
Article Type: Technical Papers
J. Turbomach. January 2007, 129(1): 53–61.
Published Online: January 11, 2006
... rotors swirling flow A radial flow turbine is employed in almost all turbocharging applications for its compactness, robustness, economic production, and relatively low specific speed. The radial turbine comprises two main elements; a rotating component that extracts work from a swirling fluid...
Journal Articles
Article Type: Technical Papers
J. Turbomach. January 2004, 126(1): 1–12.
Published Online: March 26, 2004
...Z. S. Spakovszky Rotating stall waves that travel against the direction of rotor rotation are reported for the first time and a new, low-order analytical approach to model centrifugal compressor stability is introduced. The model is capable of dealing with unsteady radially swirling flows...
Journal Articles
Article Type: Technical Papers
J. Turbomach. January 2007, 129(1): 175–183.
Published Online: March 1, 2004
... operation and the use of engine parts in place of two-dimensional counterparts. By employing an annular sector of deswirl vanes downstream of the annular sector of test vanes, the radial pressure gradient established in the swirling flow downstream of the test vanes is not disturbed. The deswirl vane exit...
Journal Articles
Article Type: Technical Papers
J. Turbomach. July 2005, 127(3): 564–572.
Published Online: March 1, 2004
..., static pressure and temperature assume a specific form for a perfect gas. A robust method for solving the system of equations that define the state of complete equilibrium (or mixed-out state) is presented using an efficient algorithm. The procedure is applied to the swirling flow exiting an isolated...
Journal Articles
Article Type: Technical Papers
J. Turbomach. October 2003, 125(4): 641–647.
Published Online: December 1, 2003
... between the outlet from the pre-swirl nozzles and the rotating core of fluid in the wheel-space. This loss increased as the pre-swirl flow-rate and inlet swirl ratio increased, and as the number of nozzles decreased. C D increased as the swirl ratio at the receiver hole radius approached unity; also C D...
Journal Articles
Article Type: Technical Papers
J. Turbomach. July 2003, 125(3): 505–512.
Published Online: August 27, 2003
... in the disk cavity indicate the strength of the swirling flow in the cavity, and show the effects of mainstream gas ingestion at low sealing flows. Ingestion is further quantified through seeding of the sealing air with nitrous oxide or carbon dioxide and measurement of gas concentrations in the cavity...
Journal Articles
Article Type: Technical Papers
J. Turbomach. April 2003, 125(2): 380–386.
Published Online: April 23, 2003
..., 2002. Paper No. 2002-GT-30480. Review Chair: E. Benvenuti. 03 June 2002 23 January 2002 23 04 2003 cooling pipe flow computational fluid dynamics gas turbines vortices swirling flow heat transfer CFD Modeling Offtake Passages Optimization It is a common...
Journal Articles
Article Type: Technical Papers
J. Turbomach. January 2003, 125(1): 48–56.
Published Online: January 23, 2003
..., 2002. Paper No. 2002-GT-30529. Review Chair: E. Benvenuti. 03 June 2002 03 January 2002 23 01 2003 gas turbines flow control aerodynamics losses heat transfer Navier-Stokes equations flow simulation nozzles swirling flow Secondary flows in airfoil passages...
Journal Articles
Article Type: Technical Papers
J. Turbomach. April 2002, 124(2): 235–241.
Published Online: April 9, 2002
... appears in the form of swirling flow. A rotation of the entire flow about the engine or compressor hub constitutes a bulk swirl and either increases or decreases engine performance depending on the direction of rotation with respect to the machine...
Journal Articles
Article Type: Technical Papers
J. Turbomach. April 2001, 123(2): 281–287.
Published Online: February 1, 2000
... the channels. The test sections were viewed from the endwall. Figure 4 shows the smoke flow patterns for each of Cases 4–6. The flow patterns clearly show the swirling flow and the vortices generated by the new geometry. The straight hole injection in Case 4 indicates that the flow impinges against the top...