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International Journal of Turbomachinery, Propulsion and Power, Volume 4, Issue 1

March 2019 - 5 articles

Cover Story: To gather the 4Q behavior, a test rig allowing the flow direction as well as the rotation direction to be reverted is necessary, with time-consuming measurements at variable positive and negative discharge in both directions of rotation the complete pump characteristics are evaluated. In the present study, an approach to investigate the complete pump characteristics by means of computational fluid dynamics (CFD) calculations is presented. Two different types of mixed flow diffuser pumps were investigated—one equipped with adjustable impeller blades, the second one with comparable low specific speed. Experimental verifications have shown a remarkably good agreement. Furthermore, an exemplary numerical waterhammer analysis shows the successful application of the presented approach. View this paper.

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Articles (5)

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Article

3 Citations

5,886 Views

22 Pages

Effect of a Recirculating Type Casing Treatment on a Highly Loaded Axial Compressor Rotor

Motoyuki Kawase and
Aldo Rona

Int. J. Turbomach. Propuls. Power2019, 4(1), 5;https://doi.org/10.3390/ijtpp4010005

25 March 2019

The tip leakage flow over the blades of an axial compressor rotor adversely affects the axial rotor efficiency and can determine the onset of tip leakage stall. The performance of a new casing treatment concept in the shape of an axisymmetric recircu...

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Article

4 Citations

4,104 Views

14 Pages

Numerical Modelling of the Ice Throw from Wind Turbines

Róbert-Zoltán Szász,
Alexandre Leroyer and
Johan Revstedt

Int. J. Turbomach. Propuls. Power2019, 4(1), 4;https://doi.org/10.3390/ijtpp4010004

26 February 2019

Ice throw is a significant risk factor in the vicinity of wind turbines located in cold climate areas. We present a method to estimate the ice chunk trajectories. First, similar to the common practice, only translation is accounted for and the object...

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Article

11 Citations

6,013 Views

18 Pages

Numerical and Experimental Investigation of the 4-Quadrant Behavior of Different Mixed Flow Diffuser Pumps

Stefan Höller,
Helmut Benigni and
Helmut Jaberg

Int. J. Turbomach. Propuls. Power2019, 4(1), 3;https://doi.org/10.3390/ijtpp4010003

7 February 2019

Besides operating a centrifugal pump under normal conditions there are additional operating conditions possible; for example, a pump operated as turbine. Another example would be a pump trip where there are several abnormal operating conditions possi...

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Article

4 Citations

6,002 Views

13 Pages

Parametric Study of a Turbofan Engine with an Auxiliary High-Pressure Bypass

Sharanabasaweshwara A. Asundi and
Syed Firasat Ali

Int. J. Turbomach. Propuls. Power2019, 4(1), 2;https://doi.org/10.3390/ijtpp4010002

14 January 2019

A parametric study of a novel turbofan engine with an auxiliary high-pressure bypass (AHPB) is presented. The underlying motivation for the study was to introduce and explore a configuration of a turbofan engine which could facilitate clean secondary...

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