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International Journal of Turbomachinery, Propulsion and Power, Volume 7, Issue 3

September 2022 - 7 articles

Cover Story: The topological analysis of the average flow field, computed from wall-resolved unsteady Reynolds-Averaged Navier–Stokes (URANS) simulations, demonstrates that the saddle point (major critical point) in the corner hub/suction side of the stalled blade migrates upstream, while staying in the corner if the mass flow rate decreases. One main blade over two is stalled on both sides because the flow that originates from this corner separation circumvents the trailing edge and migrates upstream along the pressure side. In the simulation, the pulsation of the alternate stall is coupled with the reflection of acoustic waves on the inlet and outlet planes, which is regarded as an environmental effect. View this paper
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Articles (7)

  • Article
  • Open Access
5 Citations
3,112 Views
16 Pages

The present paper investigates the aerodynamic performance of a cantilevered tandem stator based on experiments conducted within a high speed annular test rig at the Technische Universitaet Berlin. A tandem blade in this context describes a double ro...

  • Feature Paper
  • Article
  • Open Access
1 Citations
2,950 Views
22 Pages

Unsteady Analysis of a Pulsating Alternate Flow Pattern in a Radial Vaned Diffuser

  • Nicolas Poujol,
  • Martin Buisson,
  • Pierre Duquesne and
  • Isabelle Trébinjac

In centrifugal compressors, Mild Surge (MS) leads to unstable operation. Previous experimental work on a centrifugal compressor designed and built by Safran Helicopter Engines (SafranHE) showed that MS corresponds to the pulsation of an alternate sta...

  • Feature Paper
  • Review
  • Open Access
17 Citations
4,460 Views
25 Pages

Design of cooling systems for rotor platforms is critical due to the complex flow field and heat transfer phenomena related to the secondary flow structures originating at the blade leading edge. Horseshoe vortex and passage vortex are the fluid-dyna...

  • Article
  • Open Access
5 Citations
3,519 Views
16 Pages

Topology Rule-Based Methodology for Flow Separation Analysis in Turbomachinery

  • Pierre Duquesne,
  • Joffrey Chanéac,
  • Gabriel Mondin and
  • Jérôme Dombard

Boundary-layer flow separation is a common flow feature in many engineering applications. The consequences of flow separation in turbomachinery can be disastrous in terms of performance, stability and noise. In this context, flow separation is partic...

  • Article
  • Open Access
30 Citations
14,349 Views
19 Pages

Optimization methods have been widely applied to the aerodynamic design of gas turbine blades. While applying optimization to high-fidelity computational fluid dynamics (CFD) simulations has proven capable of improving engineering design performance,...

  • Article
  • Open Access
6 Citations
2,952 Views
21 Pages

Conventional signal processing methods such as Principle Component Analysis (PCA) focus on the decomposition of signals in the 2D time–frequency domain. Parallel factor analysis (PARAFAC) is a novel method used to decompose multi-dimensional ar...

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Int. J. Turbomach. Propuls. Power - ISSN 2504-186XCreative Common CC BY license