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International Journal of Turbomachinery, Propulsion and Power, Volume 5, Issue 1

March 2020 - 5 articles

Cover Story: In the present paper, hub-sided geometric contouring within the vaneless space and the vaned diffuser is utilized to increase the stable operating range of an open impeller centrifugal compressor stage. In a scale-model test rig, the performance characteristics of the novel contoured diffuser design are evaluated and compared against the baseline diffuser design. An extension of stable operating range of 8% is achieved at the highest stage Mach number. In an operating point near the stability limit, 5-hole probe measurements covering a complete diffuser blade-to-blade passage are performed to analyze the contouring’s effect on the flow at the diffuser inlet. View this paper.
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Articles (5)

  • Article
  • Open Access
6 Citations
3,614 Views
13 Pages

Evaporation Modeling of Water Droplets in a Transonic Compressor Cascade under Fogging Conditions

  • Adrian Seck,
  • Silvio Geist,
  • Janneck Harbeck,
  • Bernhard Weigand and
  • Franz Joos

High-fogging is widely used to rapidly increase the power outputs of stationary gas turbines. Therefore, water droplets are injected into the inflow air, and a considerable number enter the compressor. Within this paper, the primary process of drople...

  • Article
  • Open Access
9 Citations
4,274 Views
11 Pages

State-of-the-art centrifugal compressor units utilised in pipeline and in energy storage applications face the challenge of flexible and highly efficient operation. Geometric contouring on the hub side near a vaned diffuser affects the flow in a way...

  • Article
  • Open Access
11 Citations
3,771 Views
12 Pages

Detection and Analysis of an Alternate Flow Pattern in a Radial Vaned Diffuser

  • Victor Moënne-Loccoz,
  • Isabelle Trébinjac,
  • Nicolas Poujol and
  • Pierre Duquesne

The flow in the vaned diffuser of an aeronautical centrifugal compressor designed by Safran Helicopter Engines is analyzed through steady and unsteady pressure measurements at different rotation speeds. The analysis leads to the identification of dif...

  • Article
  • Open Access
20 Citations
7,322 Views
15 Pages

Focusing Schlieren Visualization of Transonic Turbine Tip-Leakage Flows

  • Maximilian Passmann,
  • Stefan aus der Wiesche and
  • Franz Joos

This paper presents a focusing schlieren system designed for the investigation of transonic turbine tip-leakage flows. In the first part, the functional principle and the design of the system are presented. Major design considerations and necessary t...

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Int. J. Turbomach. Propuls. Power - ISSN 2504-186X